Prof. Dr. Andreas Koch-Hansen
Astronomisches Rechen-Institut
Phone
Office
Bibliotheksbau, Room B.1-06
Postal Address
Zentrum für Astronomie der Universität Heidelberg
Astronomisches Rechen-Institut
Mönchhofstr. 12-14
69120 Heidelberg
Astronomisches Rechen-Institut
Mönchhofstr. 12-14
69120 Heidelberg
87.
12/2024
Lim, Dongwook; Chun, Sang-Hyun et al. (inc. Koch-Hansen, Andreas J.)
Two stellar populations with different metallicities in the low-mass globular cluster Gran 5
A&A 692, A14(2024)
Lim, Dongwook; Chun, Sang-Hyun et al. (inc. Koch-Hansen, Andreas J.)
Two stellar populations with different metallicities in the low-mass globular cluster Gran 5
A&A 692, A14(2024)
86.
5/2024
Prudil, Z.; Smolec, R. et al. (inc. Dékány, I.; Koch-Hansen, A. J.)
The Galactic bulge exploration. II. Line-of-sight velocity templates for single-mode RR Lyrae stars
A&A 685, A153(2024)
Prudil, Z.; Smolec, R. et al. (inc. Dékány, I.; Koch-Hansen, A. J.)
The Galactic bulge exploration. II. Line-of-sight velocity templates for single-mode RR Lyrae stars
A&A 685, A153(2024)
85.
4/2024
Prudil, Z.; Kunder, A.; Dékány, I.; Koch-Hansen, A. J.
The Galactic bulge exploration. I. The period-absolute magnitude-metallicity relations for RR Lyrae stars for GBP, V, G, GRP, I, J, H, and Ks passbands using Gaia DR3 parallaxes
A&A 684, A176(2024)
Prudil, Z.; Kunder, A.; Dékány, I.; Koch-Hansen, A. J.
The Galactic bulge exploration. I. The period-absolute magnitude-metallicity relations for RR Lyrae stars for GBP, V, G, GRP, I, J, H, and Ks passbands using Gaia DR3 parallaxes
A&A 684, A176(2024)
84.
3/2024
Butler, Evan; Kunder, Andrea et al. (inc. Koch-Hansen, Andreas J.)
RR Lyrae Stars Belonging to the Candidate Globular Cluster Patchick 99
ApJ 963, L33(2024)
Butler, Evan; Kunder, Andrea et al. (inc. Koch-Hansen, Andreas J.)
RR Lyrae Stars Belonging to the Candidate Globular Cluster Patchick 99
ApJ 963, L33(2024)
83.
2/2024
Koch-Hansen, Andreas J.; Pasquali, Anna et al.
The Halos and Environments of Nearby Galaxies (HERON) survey. IV. Complexity in the boxy galaxies NGC 720 and NGC 2768
A&A 682, A95(2024)
Koch-Hansen, Andreas J.; Pasquali, Anna et al.
The Halos and Environments of Nearby Galaxies (HERON) survey. IV. Complexity in the boxy galaxies NGC 720 and NGC 2768
A&A 682, A95(2024)
82.
1/2024
Kunder, Andrea; Prudil, Zdenek et al. (inc. Koch-Hansen, Andreas J.)
The Milky Way Bulge Extra-tidal Star Survey: BH 261 (AL 3)
AJ 167, 21(2024)
Kunder, Andrea; Prudil, Zdenek et al. (inc. Koch-Hansen, Andreas J.)
The Milky Way Bulge Extra-tidal Star Survey: BH 261 (AL 3)
AJ 167, 21(2024)
81.
1/2024
Lim, Dongwook; Koch-Hansen, Andreas J. et al.
Chemical Homogeneity of Wide Binary Systems: An Approach from Near-Infrared Spectroscopy
AJ 167, 3(2024)
Lim, Dongwook; Koch-Hansen, Andreas J. et al.
Chemical Homogeneity of Wide Binary Systems: An Approach from Near-Infrared Spectroscopy
AJ 167, 3(2024)
80.
10/2023
Mosenkov, Aleksandr V.; Rich, R. Michael et al. (inc. Koch-Hansen, Andreas J.)
The haloes and environments of nearby galaxies (HERON) - III. A 45-kpc spiral structure in the GLSB galaxy UGC 4599
MNRAS 525, 3016(2023)
Mosenkov, Aleksandr V.; Rich, R. Michael et al. (inc. Koch-Hansen, Andreas J.)
The haloes and environments of nearby galaxies (HERON) - III. A 45-kpc spiral structure in the GLSB galaxy UGC 4599
MNRAS 525, 3016(2023)
79.
6/2023
Kader, Justin A.; Pilachowski, Catherine A. et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS). VI. Extinction Maps Toward Southern Galactic Bulge Globular Clusters
ApJ 950, 126(2023)
Kader, Justin A.; Pilachowski, Catherine A. et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS). VI. Extinction Maps Toward Southern Galactic Bulge Globular Clusters
ApJ 950, 126(2023)
78.
11/2022
Kader, Justin A.; Pilachowski, Catherine A. et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS). VII. Multiple Populations in Globular Clusters of the Galactic Bulge
ApJ 940, 76(2022)
Kader, Justin A.; Pilachowski, Catherine A. et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS). VII. Multiple Populations in Globular Clusters of the Galactic Bulge
ApJ 940, 76(2022)
77.
10/2022
Lim, Dongwook; Koch-Hansen, Andreas J. et al.
High-resolution near-infrared spectroscopy of globular cluster and field stars toward the Galactic bulge
A&A 666, A62(2022)
Lim, Dongwook; Koch-Hansen, Andreas J. et al.
High-resolution near-infrared spectroscopy of globular cluster and field stars toward the Galactic bulge
A&A 666, A62(2022)
76.
10/2022
Bonifacio, P.; Monaco, L. et al. (inc. Christlieb, N.; Koch-Hansen, A. J.; Ludwig, H. -G.)
TOPoS . VI. The metal-weak tail of the metallicity distribution functions of the Milky Way and the Gaia-Sausage-Enceladus structure (Corrigendum)
A&A 666, C1(2022)
Bonifacio, P.; Monaco, L. et al. (inc. Christlieb, N.; Koch-Hansen, A. J.; Ludwig, H. -G.)
TOPoS . VI. The metal-weak tail of the metallicity distribution functions of the Milky Way and the Gaia-Sausage-Enceladus structure (Corrigendum)
A&A 666, C1(2022)
75.
9/2022
Lombardo, Linda; Bonifacio, Piercarlo et al. (inc. Koch Hansen, Andreas J.; Hanke, Michael)
Chemical Evolution of R-process Elements in Stars (CERES). I. Stellar parameters and chemical abundances from Na to Zr
A&A 665, A10(2022)
Lombardo, Linda; Bonifacio, Piercarlo et al. (inc. Koch Hansen, Andreas J.; Hanke, Michael)
Chemical Evolution of R-process Elements in Stars (CERES). I. Stellar parameters and chemical abundances from Na to Zr
A&A 665, A10(2022)
74.
9/2022
Johnson, Christian I.; Rich, R. Michael et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS) IV: Metallicity distributions and bulge structure from 2.6 million red clump stars
MNRAS 515, 1469(2022)
Johnson, Christian I.; Rich, R. Michael et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS) IV: Metallicity distributions and bulge structure from 2.6 million red clump stars
MNRAS 515, 1469(2022)
73.
8/2022
Prudil, Z.; Koch-Hansen, A. J. et al. (inc. Grebel, E. K.; Lemasle, B.)
Milky Way archaeology using RR Lyrae and type II Cepheids. II. High-velocity RR Lyrae stars and Milky Way mass
A&A 664, A148(2022)
Prudil, Z.; Koch-Hansen, A. J. et al. (inc. Grebel, E. K.; Lemasle, B.)
Milky Way archaeology using RR Lyrae and type II Cepheids. II. High-velocity RR Lyrae stars and Milky Way mass
A&A 664, A148(2022)
72.
8/2022
Marchetti, Tommaso; Johnson, Christian I. et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS). V. Cleaning the foreground populations from Galactic bulge colour-magnitude diagrams using Gaia EDR3
A&A 664, A124(2022)
Marchetti, Tommaso; Johnson, Christian I. et al. (inc. Koch-Hansen, Andreas J.)
Blanco DECam Bulge Survey (BDBS). V. Cleaning the foreground populations from Galactic bulge colour-magnitude diagrams using Gaia EDR3
A&A 664, A124(2022)
71.
11/2021
Lim, Dongwook; Koch-Hansen, Andreas J. et al.
Chemodynamics of metal-poor wide binaries in the Galactic halo: Association with the Sequoia event
A&A 655, A26(2021)
Lim, Dongwook; Koch-Hansen, Andreas J. et al.
Chemodynamics of metal-poor wide binaries in the Galactic halo: Association with the Sequoia event
A&A 655, A26(2021)
70.
9/2021
Koch-Hansen, Andreas J.; Hansen, Camilla J. et al.
NGC 1261: An r-process enhanced globular cluster from the Gaia-Enceladus event
A&A 653, A2(2021)
Koch-Hansen, Andreas J.; Hansen, Camilla J. et al.
NGC 1261: An r-process enhanced globular cluster from the Gaia-Enceladus event
A&A 653, A2(2021)
69.
9/2021
Kunder, Andrea; Crabb, Riley E. et al. (inc. Koch-Hansen, Andreas J.)
Spectroscopic Observations of Obscured Populations in the Inner Galaxy: 2MASS-GC02, Terzan 4, and the 200 km s-1 stellar peak
AJ 162, 86(2021)
Kunder, Andrea; Crabb, Riley E. et al. (inc. Koch-Hansen, Andreas J.)
Spectroscopic Observations of Obscured Populations in the Inner Galaxy: 2MASS-GC02, Terzan 4, and the 200 km s-1 stellar peak
AJ 162, 86(2021)
68.
7/2021
Bonifacio, P.; Monaco, L. et al. (inc. Christlieb, N.; Koch-Hansen, A. J.; Ludwig, H. -G.)
TOPoS. VI. The metal-weak tail of the metallicity distribution functions of the Milky Way and the Gaia-Sausage-Enceladus structure
A&A 651, A79(2021)
Bonifacio, P.; Monaco, L. et al. (inc. Christlieb, N.; Koch-Hansen, A. J.; Ludwig, H. -G.)
TOPoS. VI. The metal-weak tail of the metallicity distribution functions of the Milky Way and the Gaia-Sausage-Enceladus structure
A&A 651, A79(2021)
67.
6/2021
Crestani, J.; Braga, V. F. et al. (inc. Lala, H.; Koch-Hansen, A. J.; Grebel, E. K.; Prudil, Z.; Lemasle, B.)
On the Use of Field RR Lyrae as Galactic Probes. III. The α-element Abundances
ApJ 914, 10(2021)
Crestani, J.; Braga, V. F. et al. (inc. Lala, H.; Koch-Hansen, A. J.; Grebel, E. K.; Prudil, Z.; Lemasle, B.)
On the Use of Field RR Lyrae as Galactic Probes. III. The α-element Abundances
ApJ 914, 10(2021)
66.
4/2021
Prudil, Z.; Hanke, M. et al. (inc. Lala, H.; Grebel, E. K.; Koch-Hansen, A. J.; Lemasle, B.)
Milky Way archaeology using RR Lyrae and type II Cepheids. I. The Orphan stream in 7D using RR Lyrae stars
A&A 648, A78(2021)
Prudil, Z.; Hanke, M. et al. (inc. Lala, H.; Grebel, E. K.; Koch-Hansen, A. J.; Lemasle, B.)
Milky Way archaeology using RR Lyrae and type II Cepheids. I. The Orphan stream in 7D using RR Lyrae stars
A&A 648, A78(2021)
65.
3/2021
Lim, D.; Koch-Hansen, A. J. et al.
Blanco DECam Bulge Survey (BDBS). III. A new view of the double red clump in the Milky Way bulge through luminosity and color distribution
A&A 647, A34(2021)
Lim, D.; Koch-Hansen, A. J. et al.
Blanco DECam Bulge Survey (BDBS). III. A new view of the double red clump in the Milky Way bulge through luminosity and color distribution
A&A 647, A34(2021)
64.
1/2021
Lim, Dongwook; Lee, Young-Wook et al. (inc. Kim, Jaeyeon; Koch, Andreas)
Difference in Chemical Composition between the Bright and Faint Red Clump Stars in the Milky Way Bulge
ApJ 907, 47(2021)
Lim, Dongwook; Lee, Young-Wook et al. (inc. Kim, Jaeyeon; Koch, Andreas)
Difference in Chemical Composition between the Bright and Faint Red Clump Stars in the Milky Way Bulge
ApJ 907, 47(2021)
63.
1/2021
Koch-Hansen, Andreas J.; Hansen, Camilla Juul et al. (inc. Hanke, Michael)
Purveyors of fine halos. III. Chemical abundance analysis of a potential ωCen associate
A&A 645, A64(2021)
Koch-Hansen, Andreas J.; Hansen, Camilla Juul et al. (inc. Hanke, Michael)
Purveyors of fine halos. III. Chemical abundance analysis of a potential ωCen associate
A&A 645, A64(2021)
62.
11/2020
Hansen, C. J.; Koch, A. et al. (inc. Klessen, R. S.; Magg, M.)
Mono-enriched stars and Galactic chemical evolution. Possible biases in observations and theory
A&A 643, A49(2020)
Hansen, C. J.; Koch, A. et al. (inc. Klessen, R. S.; Magg, M.)
Mono-enriched stars and Galactic chemical evolution. Possible biases in observations and theory
A&A 643, A49(2020)
61.
9/2020
Johnson, Christian I.; Rich, Robert Michael et al. (inc. Koch, Andreas)
Blanco DECam Bulge Survey (BDBS) II: project performance, data analysis, and early science results
MNRAS 499, 2357(2020)
Johnson, Christian I.; Rich, Robert Michael et al. (inc. Koch, Andreas)
Blanco DECam Bulge Survey (BDBS) II: project performance, data analysis, and early science results
MNRAS 499, 2357(2020)
60.
9/2020
Savino, A.; Koch, A. et al. (inc. Prudil, Z.)
The age of the Milky Way inner stellar spheroid from RR Lyrae population synthesis
A&A 641, A96(2020)
Savino, A.; Koch, A. et al. (inc. Prudil, Z.)
The age of the Milky Way inner stellar spheroid from RR Lyrae population synthesis
A&A 641, A96(2020)
59.
8/2020
Rich, R. Michael; Johnson, Christian I. et al. (inc. Koch, Andreas)
The Blanco DECam bulge survey. I. The survey description and early results
MNRAS 499, 2340(2020)
Rich, R. Michael; Johnson, Christian I. et al. (inc. Koch, Andreas)
The Blanco DECam bulge survey. I. The survey description and early results
MNRAS 499, 2340(2020)
58.
8/2020
Tempel, E.; Tuvikene, T. et al. (inc. Koch, A.; Christlieb, N.)
An optimized tiling pattern for multiobject spectroscopic surveys: application to the 4MOST survey
MNRAS 497, 4626(2020)
Tempel, E.; Tuvikene, T. et al. (inc. Koch, A.; Christlieb, N.)
An optimized tiling pattern for multiobject spectroscopic surveys: application to the 4MOST survey
MNRAS 497, 4626(2020)
57.
7/2020
Cullinane, L. R.; Mackey, A. D. et al. (inc. Koch, A.)
The Magellanic Edges Survey I: Description and first results
MNRAS 497, 3055(2020)
Cullinane, L. R.; Mackey, A. D. et al. (inc. Koch, A.)
The Magellanic Edges Survey I: Description and first results
MNRAS 497, 3055(2020)
56.
6/2020
Kunder, Andrea; Pérez-Villegas, Angeles et al. (inc. Koch, Andreas)
The Bulge Radial Velocity Assay for RR Lyrae Stars (BRAVA-RR) DR2: A Bimodal Bulge?
AJ 159, 270(2020)
Kunder, Andrea; Pérez-Villegas, Angeles et al. (inc. Koch, Andreas)
The Bulge Radial Velocity Assay for RR Lyrae Stars (BRAVA-RR) DR2: A Bimodal Bulge?
AJ 159, 270(2020)
55.
5/2020
Hanke, Michael; Koch, Andreas; Prudil, Zdeněk; Grebel, Eva K.; Bastian, Ulrich
Purveyors of fine halos. II. Chemodynamical association of halo stars with Milky Way globular clusters
A&A 637, A98(2020)
Hanke, Michael; Koch, Andreas; Prudil, Zdeněk; Grebel, Eva K.; Bastian, Ulrich
Purveyors of fine halos. II. Chemodynamical association of halo stars with Milky Way globular clusters
A&A 637, A98(2020)
54.
4/2020
Reina-Campos, Marta; Hughes, Meghan E. et al. (inc. Grebel, Eva K.; Koch, Andreas; Kruijssen, J. M. Diederik)
The mass fraction of halo stars contributed by the disruption of globular clusters in the E-MOSAICS simulations
MNRAS 493, 3422(2020)
Reina-Campos, Marta; Hughes, Meghan E. et al. (inc. Grebel, Eva K.; Koch, Andreas; Kruijssen, J. M. Diederik)
The mass fraction of halo stars contributed by the disruption of globular clusters in the E-MOSAICS simulations
MNRAS 493, 3422(2020)
53.
3/2020
Mosenkov, Aleksandr; Rich, R. Michael et al. (inc. Koch, Andreas)
The haloes and environments of nearby galaxies (HERON) - II. The outer structure of edge-on galaxies
MNRAS 494, 1751(2020)
Mosenkov, Aleksandr; Rich, R. Michael et al. (inc. Koch, Andreas)
The haloes and environments of nearby galaxies (HERON) - II. The outer structure of edge-on galaxies
MNRAS 494, 1751(2020)
52.
3/2020
Tempel, E.; Norberg, P. et al. (inc. Koch, A.; Christlieb, N.)
Probabilistic fibre-to-target assignment algorithm for multi-object spectroscopic surveys
A&A 635, A101(2020)
Tempel, E.; Norberg, P. et al. (inc. Koch, A.; Christlieb, N.)
Probabilistic fibre-to-target assignment algorithm for multi-object spectroscopic surveys
A&A 635, A101(2020)
51.
12/2019
Koch, Andreas; Côté, Patrick
An outer shade of Pal: Abundance analysis of the outer halo globular cluster Palomar 13
A&A 632, A55(2019)
Koch, Andreas; Côté, Patrick
An outer shade of Pal: Abundance analysis of the outer halo globular cluster Palomar 13
A&A 632, A55(2019)
50.
12/2019
Rich, R. Michael; Mosenkov, Aleksandr et al. (inc. Koch, Andreas)
The haloes and environments of nearby galaxies (HERON) - I. Imaging, sample characteristics, and envelope diameters
MNRAS 490, 1539(2019)
Rich, R. Michael; Mosenkov, Aleksandr et al. (inc. Koch, Andreas)
The haloes and environments of nearby galaxies (HERON) - I. Imaging, sample characteristics, and envelope diameters
MNRAS 490, 1539(2019)
49.
10/2019
Watson, Darach; Hansen, Camilla J. et al. (inc. Koch, Andreas)
Identification of strontium in the merger of two neutron stars
Natur 574, 497(2019)
Watson, Darach; Hansen, Camilla J. et al. (inc. Koch, Andreas)
Identification of strontium in the merger of two neutron stars
Natur 574, 497(2019)
48.
7/2019
Koch, Andreas; Xu, Siyi et al.
Chemical composition of the outer halo globular cluster Palomar 15
A&A 627, A70(2019)
Koch, Andreas; Xu, Siyi et al.
Chemical composition of the outer halo globular cluster Palomar 15
A&A 627, A70(2019)
47.
6/2019
Lora, V.; Grebel, E. K.; Schmeja, S.; Koch, A.
Cold, Old, and Metal-poor: New Stellar Substructures in the Milky Way’s Dwarf Spheroidals
ApJ 878, 152(2019)
Lora, V.; Grebel, E. K.; Schmeja, S.; Koch, A.
Cold, Old, and Metal-poor: New Stellar Substructures in the Milky Way’s Dwarf Spheroidals
ApJ 878, 152(2019)
46.
5/2019
Koch, Andreas; Grebel, Eva K. et al.
Purveyors of fine halos: Re-assessing globular cluster contributions to the Milky Way halo buildup with SDSS-IV
A&A 625, A75(2019)
Koch, Andreas; Grebel, Eva K. et al.
Purveyors of fine halos: Re-assessing globular cluster contributions to the Milky Way halo buildup with SDSS-IV
A&A 625, A75(2019)
45.
4/2019
Müller, Oliver; Rich, R. Michael et al. (inc. Koch, Andreas)
A tidal tale: detection of several stellar streams in the environment of NGC 1052
A&A 624, L6(2019)
Müller, Oliver; Rich, R. Michael et al. (inc. Koch, Andreas)
A tidal tale: detection of several stellar streams in the environment of NGC 1052
A&A 624, L6(2019)
44.
3/2019
Hansen, C. J.; Hansen, T. T. et al. (inc. Koch, A.)
Abundances and kinematics of carbon-enhanced metal-poor stars in the Galactic halo. A new classification scheme based on Sr and Ba
A&A 623, A128(2019)
Hansen, C. J.; Hansen, T. T. et al. (inc. Koch, A.)
Abundances and kinematics of carbon-enhanced metal-poor stars in the Galactic halo. A new classification scheme based on Sr and Ba
A&A 623, A128(2019)
43.
2/2019
Koch, Andreas; Reichert, Moritz et al.
Unusual neutron-capture nucleosynthesis in a carbon-rich Galactic bulge star
A&A 622, A159(2019)
Koch, Andreas; Reichert, Moritz et al.
Unusual neutron-capture nucleosynthesis in a carbon-rich Galactic bulge star
A&A 622, A159(2019)
42.
12/2018
François, P.; Caffau, E. et al. (inc. Ludwig, H. -G.; Koch, A.; Klessen, R.; Christlieb, N.)
TOPoS. V. Abundance ratios in a sample of very metal-poor turn-off stars
A&A 620, A187(2018)
François, P.; Caffau, E. et al. (inc. Ludwig, H. -G.; Koch, A.; Klessen, R.; Christlieb, N.)
TOPoS. V. Abundance ratios in a sample of very metal-poor turn-off stars
A&A 620, A187(2018)
41.
11/2018
Hanke, Michael; Hansen, Camilla Juul; Koch, Andreas; Grebel, Eva K.
ATHOS: On-the-fly stellar parameter determination of FGK stars based on flux ratios from optical spectra⋆
A&A 619, A134(2018)
Hanke, Michael; Hansen, Camilla Juul; Koch, Andreas; Grebel, Eva K.
ATHOS: On-the-fly stellar parameter determination of FGK stars based on flux ratios from optical spectra⋆
A&A 619, A134(2018)
40.
11/2018
Piatti, Andrés E.; Koch, Andreas
Search for an Intrinsic Metallicity Spread in Old Globular Clusters of the Large Magellanic Cloud
ApJ 867, 8(2018)
Piatti, Andrés E.; Koch, Andreas
Search for an Intrinsic Metallicity Spread in Old Globular Clusters of the Large Magellanic Cloud
ApJ 867, 8(2018)
39.
8/2018
Koch, Andreas; Hanke, Michael et al.
Kinematics of outer halo globular clusters: M 75 and NGC 6426
A&A 616, A74(2018)
Koch, Andreas; Hanke, Michael et al.
Kinematics of outer halo globular clusters: M 75 and NGC 6426
A&A 616, A74(2018)
38.
5/2018
Hollyhead, K.; Lardo, C. et al. (inc. Grebel, E. K.; Koch, A.)
Kron 3: a fourth intermediate age cluster in the SMC with evidence of multiple populations
MNRAS 476, 114(2018)
Hollyhead, K.; Lardo, C. et al. (inc. Grebel, E. K.; Koch, A.)
Kron 3: a fourth intermediate age cluster in the SMC with evidence of multiple populations
MNRAS 476, 114(2018)
37.
4/2018
Bonifacio, P.; Caffau, E. et al. (inc. Ludwig, H. -G.; Koch, A.; Klessen, R. S.; Christlieb, N.)
TOPoS. IV. Chemical abundances from high-resolution observations of seven extremely metal-poor stars
A&A 612, A65(2018)
Bonifacio, P.; Caffau, E. et al. (inc. Ludwig, H. -G.; Koch, A.; Klessen, R. S.; Christlieb, N.)
TOPoS. IV. Chemical abundances from high-resolution observations of seven extremely metal-poor stars
A&A 612, A65(2018)
36.
4/2018
Kunder, Andrea; Mills, Arthur et al. (inc. Koch, Andreas)
Radial Velocities of RR Lyrae Stars in and around NGC 6441
AJ 155, 171(2018)
Kunder, Andrea; Mills, Arthur et al. (inc. Koch, Andreas)
Radial Velocities of RR Lyrae Stars in and around NGC 6441
AJ 155, 171(2018)
35.
1/2018
Koch, Andreas; Hansen, Terese T. et al.
Detailed chemical abundance analysis of the thick disk star cluster Gaia 1
A&A 609, A13(2018)
Koch, Andreas; Hansen, Terese T. et al.
Detailed chemical abundance analysis of the thick disk star cluster Gaia 1
A&A 609, A13(2018)
34.
9/2017
Koch, Andreas; Kunder, Andrea et al.
Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster
A&A 605, A128(2017)
Koch, Andreas; Kunder, Andrea et al.
Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster
A&A 605, A128(2017)
33.
3/2017
Hanke, M.; Koch, A. et al.
Insights into the chemical composition of the metal-poor Milky Way halo globular clusterNGC 6426
A&A 599, A97(2017)
Hanke, M.; Koch, A. et al.
Insights into the chemical composition of the metal-poor Milky Way halo globular cluster
A&A 599, A97(2017)
32.
5/2016
Hansen, C. J.; Rich, R. M. et al. (inc. Ludwig, H. -G.; Koch, A.)
Chemical abundances in a high-velocity RR Lyrae star near the bulge
A&A 590, A39(2016)
Hansen, C. J.; Rich, R. M. et al. (inc. Ludwig, H. -G.; Koch, A.)
Chemical abundances in a high-velocity RR Lyrae star near the bulge
A&A 590, A39(2016)
31.
2/2016
Martin, Nicolas F.; Ibata, Rodrigo A. et al. (inc. Koch, Andreas)
Triangulum II: A Very Metal-poor and Dynamically Hot Stellar System
ApJ 818, 40(2016)
Martin, Nicolas F.; Ibata, Rodrigo A. et al. (inc. Koch, Andreas)
Triangulum II: A Very Metal-poor and Dynamically Hot Stellar System
ApJ 818, 40(2016)
30.
1/2016
Hendricks, Benjamin; Boeche, Corrado et al. (inc. Koch, Andreas; Frank, Matthias J.)
Evidence for a chemical enrichment coupling of globular clusters and field stars in the Fornax dSph
A&A 585, A86(2016)
Hendricks, Benjamin; Boeche, Corrado et al. (inc. Koch, Andreas; Frank, Matthias J.)
Evidence for a chemical enrichment coupling of globular clusters and field stars in the Fornax dSph
A&A 585, A86(2016)
29.
12/2015
Koch, Andreas; Frank, Matthias J. et al. (inc. Pasquali, Anna)
Major Mergers with Small Galaxies: The Discovery of a Magellanic-type Galaxy at z = 0.12
ApJ 815, 105(2015)
Koch, Andreas; Frank, Matthias J. et al. (inc. Pasquali, Anna)
Major Mergers with Small Galaxies: The Discovery of a Magellanic-type Galaxy at z = 0.12
ApJ 815, 105(2015)
28.
9/2015
Frank, Matthias J.; Koch, Andreas et al. (inc. Kacharov, Nikolay)
Strömgren uvby photometry of the peculiar globular cluster NGC 2419
A&A 581, A72(2015)
Frank, Matthias J.; Koch, Andreas et al. (inc. Kacharov, Nikolay)
Strömgren uvby photometry of the peculiar globular cluster NGC 2419
A&A 581, A72(2015)
27.
9/2015
Hansen, C. J.; Ludwig, H. -G. et al. (inc. Christlieb, N.; Koch, A.; Seifert, W.)
Stellar science from a blue wavelength range. A possible design for the blue arm of 4MOST
AN 336, 665(2015)
Hansen, C. J.; Ludwig, H. -G. et al. (inc. Christlieb, N.; Koch, A.; Seifert, W.)
Stellar science from a blue wavelength range. A possible design for the blue arm of 4MOST
AN 336, 665(2015)
26.
7/2015
Koch, Andreas; Danforth, Charles W. et al.
A Detection of Gas Associated with the M31 Stellar Stream
ApJ 807, 153(2015)
Koch, Andreas; Danforth, Charles W. et al.
A Detection of Gas Associated with the M31 Stellar Stream
ApJ 807, 153(2015)
25.
7/2015
Bonifacio, P.; Caffau, E. et al. (inc. Koch, A.; Glover, S. C. O.; Clark, P. C.; Christlieb, N.; Ludwig, H. -G.; Klessen, R. S.; Spite, M.)
TOPoS . II. On the bimodality of carbon abundance in CEMP stars Implications on the early chemical evolution of galaxies
A&A 579, A28(2015)
Bonifacio, P.; Caffau, E. et al. (inc. Koch, A.; Glover, S. C. O.; Clark, P. C.; Christlieb, N.; Ludwig, H. -G.; Klessen, R. S.; Spite, M.)
TOPoS . II. On the bimodality of carbon abundance in CEMP stars Implications on the early chemical evolution of galaxies
A&A 579, A28(2015)
24.
6/2015
Hyde, E. A.; Keller, S. et al. (inc. Koch, A.)
Selecting Sagittarius: Identification and Chemical Characterization of the Sagittarius Stream
ApJ 805, 189(2015)
Hyde, E. A.; Keller, S. et al. (inc. Koch, A.)
Selecting Sagittarius: Identification and Chemical Characterization of the Sagittarius Stream
ApJ 805, 189(2015)
23.
5/2015
Ural, Uğur; Cescutti, Gabriele et al. (inc. Koch, Andreas)
An inefficient dwarf: chemical abundances and the evolution of the Ursa Minor dwarf spheroidal galaxy
MNRAS 449, 761(2015)
Ural, Uğur; Cescutti, Gabriele et al. (inc. Koch, Andreas)
An inefficient dwarf: chemical abundances and the evolution of the Ursa Minor dwarf spheroidal galaxy
MNRAS 449, 761(2015)
22.
12/2014
Hendricks, Benjamin; Koch, Andreas et al.
Insights from the outskirts: Chemical and dynamical properties in the outer parts of the Fornax dwarf spheroidal galaxy
A&A 572, A82(2014)
Hendricks, Benjamin; Koch, Andreas et al.
Insights from the outskirts: Chemical and dynamical properties in the outer parts of the Fornax dwarf spheroidal galaxy
A&A 572, A82(2014)
21.
10/2014
Johnson, Christian I.; Rich, R. Michael et al. (inc. Koch, Andreas)
Light, Alpha, and Fe-peak Element Abundances in the Galactic Bulge
AJ 148, 67(2014)
Johnson, Christian I.; Rich, R. Michael et al. (inc. Koch, Andreas)
Light, Alpha, and Fe-peak Element Abundances in the Galactic Bulge
AJ 148, 67(2014)
20.
7/2014
Kacharov, N.; Bianchini, P. et al. (inc. Frank, M. J.; Koch, A.)
A study of rotating globular clusters. The case of the old, metal-poor globular cluster NGC 4372
A&A 567, A69(2014)
Kacharov, N.; Bianchini, P. et al. (inc. Frank, M. J.; Koch, A.)
A study of rotating globular clusters. The case of the old, metal-poor globular cluster NGC 4372
A&A 567, A69(2014)
19.
4/2014
Hendricks, Benjamin; Koch, Andreas et al. (inc. Boeche, Corrado)
The Metal-poor Knee in the Fornax Dwarf Spheroidal Galaxy
ApJ 785, 102(2014)
Hendricks, Benjamin; Koch, Andreas et al. (inc. Boeche, Corrado)
The Metal-poor Knee in the Fornax Dwarf Spheroidal Galaxy
ApJ 785, 102(2014)
18.
1/2014
Koch, Andreas; Hansen, Terese et al.
A Spectroscopic Binary in the Hercules Dwarf Spheroidal Galaxy
ApJ 780, 91(2014)
Koch, Andreas; Hansen, Terese et al.
A Spectroscopic Binary in the Hercules Dwarf Spheroidal Galaxy
ApJ 780, 91(2014)
17.
12/2013
Caffau, E.; Bonifacio, P. et al. (inc. Ludwig, H. -G.; Koch, A.; Klessen, R.; Glover, S.; Clark, P.; Christlieb, N.; Sbordone, L.)
TOPoS. I. Survey design and analysis of the first sample
A&A 560, A71(2013)
Caffau, E.; Bonifacio, P. et al. (inc. Ludwig, H. -G.; Koch, A.; Klessen, R.; Glover, S.; Clark, P.; Christlieb, N.; Sbordone, L.)
TOPoS. I. Survey design and analysis of the first sample
A&A 560, A71(2013)
16.
6/2013
Koch, A.; Feltzing, S. et al.
Neutron-capture element deficiency of the Hercules dwarf spheroidal galaxy
A&A 554, A5(2013)
Koch, A.; Feltzing, S. et al.
Neutron-capture element deficiency of the Hercules dwarf spheroidal galaxy
A&A 554, A5(2013)
15.
6/2013
Kacharov, N.; Koch, A. et al.
A comprehensive chemical abundance study of the outer halo globular cluster M 75
A&A 554, A81(2013)
Kacharov, N.; Koch, A. et al.
A comprehensive chemical abundance study of the outer halo globular cluster M 75
A&A 554, A81(2013)
14.
5/2013
Collins, Michelle L. M.; Chapman, Scott C. et al. (inc. Koch, Andreas)
A Kinematic Study of the Andromeda Dwarf Spheroidal System
ApJ 768, 172(2013)
Collins, Michelle L. M.; Chapman, Scott C. et al. (inc. Koch, Andreas)
A Kinematic Study of the Andromeda Dwarf Spheroidal System
ApJ 768, 172(2013)
13.
3/2013
Johnson, Christian I.; Rich, R. Michael et al. (inc. Koch, Andreas)
Metallicity Distribution Functions, Radial Velocities, and Alpha Element Abundances in Three Off-axis Bulge Fields
ApJ 765, 157(2013)
Johnson, Christian I.; Rich, R. Michael et al. (inc. Koch, Andreas)
Metallicity Distribution Functions, Radial Velocities, and Alpha Element Abundances in Three Off-axis Bulge Fields
ApJ 765, 157(2013)
12.
3/2013
Caffau, E.; Koch, A. et al. (inc. Grebel, E. K.; Ludwig, H. -G.; Christlieb, N.; Hansen, C. J.; Sbordone, L.)
Velocity and abundance precisions for future high-resolution spectroscopic surveys: A study for 4MOST
AN 334, 197(2013)
Caffau, E.; Koch, A. et al. (inc. Grebel, E. K.; Ludwig, H. -G.; Christlieb, N.; Hansen, C. J.; Sbordone, L.)
Velocity and abundance precisions for future high-resolution spectroscopic surveys: A study for 4MOST
AN 334, 197(2013)
11.
2/2013
Lianou, S.; Grebel, E. K. et al. (inc. Koch, A.)
Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: Clues from the Sculptor group
A&A 550, A7(2013)
Lianou, S.; Grebel, E. K. et al. (inc. Koch, A.)
Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: Clues from the Sculptor group
A&A 550, A7(2013)
10.
9/2012
Haschke, Raoul; Grebel, Eva K. et al. (inc. Koch, Andreas; Hansen, Camilla J.; Duffau, Sonia)
Chemical Abundances of Metal-poor RR Lyrae Stars in the Magellanic Clouds
AJ 144, 88(2012)
Haschke, Raoul; Grebel, Eva K. et al. (inc. Koch, Andreas; Hansen, Camilla J.; Duffau, Sonia)
Chemical Abundances of Metal-poor RR Lyrae Stars in the Magellanic Clouds
AJ 144, 88(2012)
9.
8/2012
Koch, Andreas; Burkert, Andreas et al.
Threshing in Action: The Tidal Disruption of a Dwarf Galaxy by the Hydra I Cluster
ApJ 755, L13(2012)
Koch, Andreas; Burkert, Andreas et al.
Threshing in Action: The Tidal Disruption of a Dwarf Galaxy by the Hydra I Cluster
ApJ 755, L13(2012)
8.
3/2012
Kunder, Andrea; Koch, Andreas et al.
The Bulge Radial Velocity Assay (BRAVA). II. Complete Sample and Data Release
AJ 143, 57(2012)
Kunder, Andrea; Koch, Andreas et al.
The Bulge Radial Velocity Assay (BRAVA). II. Complete Sample and Data Release
AJ 143, 57(2012)
7.
3/2012
Salucci, Paolo; Wilkinson, Mark I. et al. (inc. Koch, Andreas; Grebel, Eva K.)
Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws
MNRAS 420, 2034(2012)
Salucci, Paolo; Wilkinson, Mark I. et al. (inc. Koch, Andreas; Grebel, Eva K.)
Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws
MNRAS 420, 2034(2012)
6.
2/2012
Rich, R. M.; Collins, M. L. M. et al. (inc. Koch, A.)
A tidally distorted dwarf galaxy near NGC 4449
Natur 482, 192(2012)
Rich, R. M.; Collins, M. L. M. et al. (inc. Koch, A.)
A tidally distorted dwarf galaxy near NGC 4449
Natur 482, 192(2012)
5.
11/2011
Lépine, Sébastien; Koch, Andreas et al.
A First Measurement of the Proper Motion of the Leo II Dwarf Spheroidal Galaxy
ApJ 741, 100(2011)
Lépine, Sébastien; Koch, Andreas et al.
A First Measurement of the Proper Motion of the Leo II Dwarf Spheroidal Galaxy
ApJ 741, 100(2011)
4.
3.
9/2011
Koch, Andreas; Lind, Karin et al.
Discovery of a Super-Li-rich Turnoff Star in the Metal-poor Globular Cluster NGC 6397
ApJ 738, L29(2011)
Koch, Andreas; Lind, Karin et al.
Discovery of a Super-Li-rich Turnoff Star in the Metal-poor Globular Cluster NGC 6397
ApJ 738, L29(2011)
2.
8/2011
Koch, Andreas; McWilliam, Andrew
A Differential Chemical Element Analysis of the Metal-poor Globular Cluster NGC 6397
AJ 142, 63(2011)
Koch, Andreas; McWilliam, Andrew
A Differential Chemical Element Analysis of the Metal-poor Globular Cluster NGC 6397
AJ 142, 63(2011)
1.
7/2011
Lianou, S.; Grebel, E. K.; Koch, A.
Spectroscopic versus photometric metallicities: Milky Way dwarf spheroidal companions as a test case
A&A 531, A152(2011)
Lianou, S.; Grebel, E. K.; Koch, A.
Spectroscopic versus photometric metallicities: Milky Way dwarf spheroidal companions as a test case
A&A 531, A152(2011)
