Ruprecht-Karls-Universität Heidelberg
Personnel

Dr. Hans-Günter Ludwig

Landessternwarte



Office
Nordinstitut, Room 203

Postal address
Zentrum für Astronomie der Universität Heidelberg
Landessternwarte
Königstuhl 12
69117 Heidelberg






Publications done at ZAH since 2007

81.
5/2018
Kučinskas, A.; Klevas, J. et al. (inc. Ludwig, H. -G.)
Using the CIFIST grid of CO5BOLD 3D model atmospheres to study the effects of stellar granulation on photometric colours. II. The role of convection across the H-R diagram
A&A 613, A24(2018)

80.
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)

79.
3/2018
Bonifacio, P.; Caffau, E. et al. (inc. Homeier, D.; Ludwig, H. -G.)
Using the CIFIST grid of CO5BOLD 3D model atmospheres to study the effects of stellar granulation on photometric colours. I. Grids of 3D corrections in the UBVRI, 2MASS, HIPPARCOS, Gaia, and SDSS systems
A&A 611, A68(2018)

78.
3/2018
Vasilyev, V.; Ludwig, H. -G. et al. (inc. Lemasle, B.)
Spectroscopic properties of a two-dimensional time-dependent Cepheid model. II. Determination of stellar parameters and abundances
A&A 611, A19(2018)

77.
1/2018
Klevas, J.; Kučinskas, A. et al. (inc. Ludwig, H. -G.)
Impact of magnetic fields on the structure of convective atmospheres of red giant stars
CoSka 48, 280(2018)

76.
10/2017
Vasilyev, V.; Ludwig, H. -G. et al. (inc. Lemasle, B.)
Spectroscopic properties of a two-dimensional time-dependent Cepheid model. I. Description and validation of the model
A&A 606, A140(2017)

75.
10/2017
Wedemeyer, Sven; Kučinskas, Arūnas et al. (inc. Ludwig, Hans-Günter)
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. VI. First chromosphere model of a late-type giant
A&A 606, A26(2017)

74.
9/2017
Dravins, Dainis; Ludwig, Hans-Günter et al.
Spatially resolved spectroscopy across stellar surfaces. II. High-resolution spectra across HD 209458 (G0 V)
A&A 605, A91(2017)

73.
9/2017
Dravins, Dainis; Ludwig, Hans-Günter et al.
Spatially resolved spectroscopy across stellar surfaces. I. Using exoplanet transits to analyze 3D stellar atmospheres
A&A 605, A90(2017)

72.
8/2017
Duffau, S.; Caffau, E. et al. (inc. Christlieb, N.; Ludwig, H. -G.)
The Gaia-ESO Survey: Galactic evolution of sulphur and zinc
A&A 604, A128(2017)

71.
7/2017
Černiauskas, A.; Kučinskas, A. et al. (inc. Ludwig, H. -G.)
Abundances of Na, Mg, and K in the atmospheres of red giant branch stars of Galactic globular cluster 47 Tucanae
A&A 604, A35(2017)

70.
7/2017
Thygesen, Anders O.; Kirby, Evan N. et al. (inc. Ludwig, Hans-G.)
An Investigation of the Formation and Line Properties of MgH in 3D Hydrodynamical Model Stellar Atmospheres
ApJ 843, 144(2017)

69.
3/2017
Prakapavičius, D.; Kučinskas, A. et al. (inc. Ludwig, H. -G.)
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. V. Oxygen abundance in the metal-poor giant HD 122563 from OH UV lines
A&A 599, A128(2017)

68.
3/2017
Sonoi, T.; Belkacem, K. et al. (inc. Ludwig, H. -G.)
Computation of eigenfrequencies for equilibrium models including turbulent pressure
A&A 600, A31(2017)

67.
2/2017
Gallagher, A. J.; Caffau, E. et al. (inc. Homeier, D.; Ludwig, H. -G.)
An in-depth spectroscopic examination of molecular bands from 3D hydrodynamical model atmospheres. II. Carbon-enhanced metal-poor 3D model atmospheres
A&A 598, L10(2017)

66.
10/2016
Caffau, E.; Bonifacio, P. et al. (inc. Christlieb, N.; Glover, S.; Klessen, R.; Ludwig, H. -G.)
TOPoS. III. An ultra iron-poor multiple CEMP system
A&A 595, L6(2016)

65.
9/2016
Ludwig, H. -G.; Steffen, M.
Hydrodynamical model atmospheres: Their impact on stellar spectroscopy and asteroseismology of late-type stars
AN 337, 844(2016)

64.
9/2016
Gallagher, A. J.; Caffau, E. et al. (inc. Ludwig, H. -G.)
An in-depth spectroscopic examination of molecular bands from 3D hydrodynamical model atmospheres. I. Formation of the G-band in metal-poor dwarf stars
A&A 593, A48(2016)

63.
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)

62.
4/2016
Wedemeyer, S.; Bastian, T. et al. (inc. Ludwig, H. -G.)
Solar Science with the Atacama Large Millimeter/Submillimeter Array—A New View of Our Sun
SSRv 200, 1(2016)

61.
4/2016
Thygesen, A. O.; Sbordone, L. et al. (inc. Christlieb, N.; Ludwig, H. -G.)
The chemical composition of red giants in 47 Tucanae. II. Magnesium isotopes and pollution scenarios
A&A 588, A66(2016)

60.
2/2016
Klevas, J.; Kučinskas, A. et al. (inc. Ludwig, H. -G.)
Lithium spectral line formation in stellar atmospheres. The impact of convection and NLTE effects
A&A 586, A156(2016)

59.
1/2016
Caffau, E.; Andrievsky, S. et al. (inc. Ludwig, H. -G.)
GIANO Y-band spectroscopy of dwarf stars: Phosphorus, sulphur, and strontium abundances
A&A 585, A16(2016)

58.
11/2015
Sonoi, T.; Samadi, R. et al. (inc. Ludwig, H. -G.)
Surface-effect corrections for solar-like oscillations using 3D hydrodynamical simulations. I. Adiabatic oscillations
A&A 583, A112(2015)

57.
11/2015
Steffen, M.; Prakapavičius, D. et al. (inc. Ludwig, H. -G.)
The photospheric solar oxygen project. IV. 3D-NLTE investigation of the 777 nm triplet lines
A&A 583, A57(2015)

56.
10/2015
Tremblay, P. -E.; Fontaine, G. et al. (inc. Ludwig, H. -G.)
On the Evolution of Magnetic White Dwarfs
ApJ 812, 19(2015)

55.
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)

54.
8/2015
Tremblay, P. -E.; Gianninas, A. et al. (inc. Ludwig, H. -G.)
3D Model Atmospheres for Extremely Low-mass White Dwarfs
ApJ 809, 148(2015)

53.
7/2015
Gallagher, A. J.; Ludwig, H. -G. et al.
A three-dimensional hydrodynamical line profile analysis of iron lines and barium isotopes in HD 140283
A&A 579, A94(2015)

52.
7/2015
Caffau, E.; Ludwig, H. -G. et al.
The photospheric solar oxygen project. III. Investigation of the centre-to-limb variation of the 630 nm [O I]-Ni I blend
A&A 579, A88(2015)

51.
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)

50.
4/2015
Dobrovolskas, V.; Kučinskas, A. et al. (inc. Ludwig, H. -G.; Caffau, E.)
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. IV. Oxygen diagnostics in extremely metal-poor red giants with infrared OH lines
A&A 576, A128(2015)

49.
2/2015
Tremblay, P. -E.; Ludwig, H. -G. et al.
Calibration of the Mixing-length Theory for Convective White Dwarf Envelopes
ApJ 799, 142(2015)

48.
12/2014
Thygesen, A. O.; Sbordone, L. et al. (inc. Ludwig, H. -G.)
The chemical composition of red giants in 47 Tucanae. I. Fundamental parameters and chemical abundance patterns
A&A 572, A108(2014)

47.
8/2014
Caffau, E.; Monaco, L. et al. (inc. Sbordone, L.; Ludwig, H. -G.)
Clues on the Galactic evolution of sulphur from star clusters
A&A 568, A29(2014)

46.
6/2014
Tremblay, P. -E.; Leggett, S. K. et al. (inc. Ludwig, H. -G.)
White Dwarfs in the UKIRT Infrared Deep Sky Survey Data Release 9
ApJ 788, 103(2014)

45.
5/2014
Dobrovolskas, V.; Kučinskas, A. et al. (inc. Ludwig, H. -G.; Caffau, E.; Sbordone, L.)
Abundances of lithium, oxygen, and sodium in the turn-off stars of Galactic globular cluster 47 Tucanae
A&A 565, A121(2014)

44.
1/2014
Caffau, E.; Steffen, M. et al. (inc. Ludwig, H. -G.)
Isotope spectroscopy
AN 335, 59(2014)

43.
12/2013
Caffau, E.; Bonifacio, P. et al. (inc. Ludwig, H. -G.; Sbordone, L.)
X-shooter GTO: evidence for a population of extremely metal-poor, alpha-poor stars
A&A 560, A15(2013)

42.
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)

41.
11/2013
Samadi, R.; Belkacem, K. et al. (inc. Caffau, E.; Ludwig, H. -G.)
Stellar granulation as seen in disk-integrated intensity. II. Theoretical scaling relations compared with observations
A&A 559, A40(2013)

40.
11/2013
Tremblay, P. -E.; Ludwig, H. -G. et al.
Spectroscopic analysis of DA white dwarfs with 3D model atmospheres
A&A 559, A104(2013)

39.
11/2013
Dobrovolskas, V.; Kučinskas, A. et al. (inc. Caffau, E.; Ludwig, H. -G.)
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. III. Line formation in the atmospheres of giants located close to the base of the red giant branch
A&A 559, A102(2013)

38.
11/2013
Samadi, R.; Belkacem, K.; Ludwig, H. -G.
Stellar granulation as seen in disk-integrated intensity. I. Simplified theoretical modeling
A&A 559, A39(2013)

37.
9/2013
Tremblay, P. -E.; Ludwig, H. -G. et al. (inc. Caffau, E.)
Granulation properties of giants, dwarfs, and white dwarfs from the CIFIST 3D model atmosphere grid
A&A 557, A7(2013)

36.
6/2013
Caffau, E.; Ludwig, H. -G. et al.
The photospheric solar oxygen project. II. Non-concordance of the oxygen abundance derived from two forbidden lines
A&A 554, A126(2013)

35.
4/2013
Tremblay, P. -E.; Ludwig, H. -G. et al.
Pure-hydrogen 3D model atmospheres of cool white dwarfs
A&A 552, A13(2013)

34.
4/2013
Spite, M.; Caffau, E. et al. (inc. Christlieb, N.; Ludwig, H. -G.)
Carbon-enhanced metal-poor stars: the most pristine objects?
A&A 552, A107(2013)

33.
3/2013
Ayres, Thomas R.; Lyons, J. R. et al. (inc. Caffau, E.; Ludwig, H. -G.)
Is the Sun Lighter than the Earth? Isotopic CO in the Photosphere, Viewed through the Lens of Three-dimensional Spectrum Synthesis
ApJ 765, 46(2013)

32.
3/2013
Li, H. N.; Ludwig, H. -G. et al. (inc. Christlieb, N.; Caffau, E.)
Fluorine Abundances of Galactic Low-metallicity Giants
ApJ 765, 51(2013)

31.
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)

30.
2/2013
Wedemeyer, S.; Ludwig, H. -G. et al.
Three-dimensional magnetohydrodynamic simulations of M-dwarf chromospheres
AN 334, 137(2013)

29.
2/2013
Allende Prieto, C.; Koesterke, L. et al. (inc. Caffau, E.; Ludwig, H. -G.)
Convective line shifts for the Gaia RVS from the CIFIST 3D model atmosphere grid
A&A 550, A103(2013)

28.
1/2013
Kučinskas, A.; Steffen, M. et al. (inc. Caffau, E.; Ludwig, H. -G.)
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. II. Spectral line formation in the atmosphere of a giant located near the RGB tip
A&A 549, A14(2013)

27.
12/2012
Ludwig, Johannes; Pasquali, Anna et al. (inc. Grebel, Eva K.)
Giant Galaxies, Dwarfs, and Debris Survey. I. Dwarf Galaxies and Tidal Features around NGC 7331
AJ 144, 190(2012)

26.
11/2012
Ludwig, H. -G.; Kučinskas, A.
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. I. Atmospheric structure of a giant located near the RGB tip
A&A 547, A118(2012)

25.
11/2012
Tremblay, P. -E.; Schilbach, E. et al. (inc. Ludwig, H. -G.; Jordan, S.; Röser, S.)
Spectroscopic and photometric studies of white dwarfs in the Hyades
A&A 547, A99(2012)

24.
7/2012
Samadi, R.; Belkacem, K. et al. (inc. Caffau, E.; Ludwig, H. -G.)
Amplitudes of solar-like oscillations in red giant stars. Evidence for non-adiabatic effects using CoRoT observations
A&A 543, A120(2012)

23.
6/2012
Bonifacio, P.; Sbordone, L. et al. (inc. Ludwig, H. -G.; Caffau, E.)
Chemical abundances of distant extremely metal-poor unevolved stars
A&A 542, A87(2012)

22.
6/2012
Caffau, E.; Bonifacio, P. et al. (inc. Sbordone, L.; Ludwig, H. -G.)
A primordial star in the heart of the Lion
A&A 542, A51(2012)

21.
5/2012
Spite, M.; Andrievsky, S. M. et al. (inc. Ludwig, H. -G.; Caffau, E.)
NLTE determination of the calcium abundance and 3D corrections in extremely metal-poor stars
A&A 541, A143(2012)

20.
4/2012
Dobrovolskas, V.; Kučinskas, A. et al. (inc. Caffau, E.; Ludwig, H. -G.)
Barium abundance in red giants of NGC 6752. Non-local thermodynamic equilibrium and three-dimensional effects
A&A 540, A128(2012)

19.
3/2012
Beeck, B.; Collet, R. et al. (inc. Ludwig, H. -G.)
Simulations of the solar near-surface layers with the CO5BOLD, MURaM, and Stagger codes
A&A 539, A121(2012)

18.
3/2012
Monaco, L.; Villanova, S. et al. (inc. Ludwig, H. -G.; Caffau, E.)
Lithium and sodium in the globular cluster M 4. Detection of a Li-rich dwarf star: preservation or pollution?
A&A 539, A157(2012)

17.
2/2012
Freytag, B.; Steffen, M. et al. (inc. Ludwig, H. -G.)
Simulations of stellar convection with CO5BOLD
JCoPh 231, 919(2012)

16.
0/2012
Ludwig, Hans-Günter; Steffen, Matthias
3D Model Atmospheres of Red Giant Stars
ASSP 26, 125(2012)

15.
10/2011
Caffau, E.; Bonifacio, P. et al. (inc. Sbordone, L.; Ludwig, H. -G.)
X-Shooter GTO: chemical analysis of a sample of EMP candidates
A&A 534, A4(2011)

14.
9/2011
Caffau, Elisabetta; Bonifacio, Piercarlo et al. (inc. Ludwig, Hans-G.; Sbordone, Luca)
An extremely primitive star in the Galactic halo
Natur 477, 67(2011)

13.
7/2011
Tremblay, P. -E.; Ludwig, H. -G. et al.
Solution to the problem of the surface gravity distribution of cool DA white dwarfs from improved 3D model atmospheres
A&A 531, L19(2011)

12.
4/2011
Chiavassa, A.; Pasquato, E. et al. (inc. Ludwig, H. -G.)
Radiative hydrodynamic simulations of red supergiant stars. III. Spectro-photocentric variability, photometric variability, and consequences on Gaia measurements
A&A 528, A120(2011)

11.
4/2011
Spite, M.; Caffau, E. et al. (inc. Ludwig, H. -G.)
First stars. XIV. Sulfur abundances in extremely metal-poor stars
A&A 528, A9(2011)

10.
3/2011
Bonifacio, P.; Caffau, E. et al. (inc. Ludwig, H. -G.)
Extremely metal-poor stars in SDSS fields
AN 332, 251(2011)

9.
2/2011
Pasquini, L.; Melo, C. et al. (inc. Ludwig, H. -G.)
Gravitational redshifts in main-sequence and giant stars
A&A 526, A127(2011)

8.
2/2011
Caffau, E.; Faraggiana, R. et al. (inc. Ludwig, H. -G.)
The solar photospheric abundance of zirconium
AN 332, 128(2011)

7.
12/2010
Karoff, C.; Chaplin, W. J. et al. (inc. Ludwig, H. -G.)
Asteroseismology of solar-type stars with Kepler I: Data analysis
AN 331, 972(2010)

6.
12/2010
Bonifacio, P.; Caffau, E.; Ludwig, H. -G.
Cu I resonance lines in turn-off stars of NGC 6752 and NGC 6397. Effects of granulation from CO5BOLD models
A&A 524, A96(2010)

5.
11/2010
Sbordone, L.; Bonifacio, P. et al. (inc. Christlieb, N.; Ludwig, H. -G.)
The metal-poor end of the Spite plateau. I. Stellar parameters, metallicities, and lithium abundances
A&A 522, A26(2010)

4.
9/2010
González Hernández, J. I.; Bonifacio, P. et al. (inc. Ludwig, H. -G.)
Galactic evolution of oxygen. OH lines in 3D hydrodynamical model atmospheres
A&A 519, A46(2010)

3.
7/2010
Caffau, E.; Sbordone, L. et al. (inc. Ludwig, H. -G.)
Sulphur abundances in halo stars from multiplet 3 at 1045 nm
AN 331, 725(2010)

2.
5/2010
Caffau, E.; Ludwig, H. -G. et al.
The solar photospheric abundance of carbon. Analysis of atomic carbon lines with the CO5BOLD solar model
A&A 514, A92(2010)

1.
4/2010
Behara, N. T.; Bonifacio, P. et al. (inc. Ludwig, H. -G.)
Three carbon-enhanced metal-poor dwarf stars from the SDSS. Chemical abundances from CO5BOLD 3D hydrodynamical model atmospheres
A&A 513, A72(2010)

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