Ruprecht-Karls-Universität Heidelberg
Personnel > 

Dr. Yiannis Tsapras


Astronomisches Rechen-Institut



Office
Neubau, Room N.K-30

Postal address
Zentrum für Astronomie der Universität Heidelberg
Astronomisches Rechen-Institut
Mönchhofstr. 12-14
69120 Heidelberg





Research interests
My primary research interests lie in the field of exoplanet science and I am involved in projects that use the complementary techniques of microlensing, radial velocity and transits to search for planets orbiting distant stars. Besides exoplanets, I work on robotic astronomy and participate in studies of variable stars.



Publications done at ZAH since 2007

22.
11/2018
Ribas, I.; Tuomi, M. et al. (inc. Tsapras, Y.; Seifert, W.; Reffert, S.; Kaminski, A.; Quirrenbach, A.)
A candidate super-Earth planet orbiting near the snow line of Barnard's star
Natur 563, 365(2018)

21.
1/2018
Hundertmark, M.; Street, R. A. et al. (inc. Ment, K.; Wambsganss, J.; Schmidt, R. W.; Tsapras, Y.)
RoboTAP: Target priorities for robotic microlensing observations
A&A 609, A55(2018)

20.
1/2018
Ryu, Y. -H.; Yee, J. C. et al. (inc. Ment, S. K.; Wambsganss, J.; Schmidt, R.; Hundertmark, M.; Tsapras, Y.)
OGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary
AJ 155, 40(2018)

19.
8/2017
Wang, Tianshu; Zhu, Wei et al. (inc. Schmidt, R.; Wambsganss, J.; Hundertmark, M.; Tsapras, Y.)
Ground-based Parallax Confirmed by Spitzer: Binary Microlensing Event MOA-2015-BLG-020
ApJ 845, 129(2017)

18.
7/2017
Koshimoto, N.; Shvartzvald, Y. et al. (inc. Tsapras, Y.; Hundertmark, M.)
MOA-2016-BLG-227Lb: A Massive Planet Characterized by Combining Light-curve Analysis and Keck AO Imaging
AJ 154, 3(2017)

17.
4/2017
Rattenbury, N. J.; Bennett, D. P. et al. (inc. Schmidt, R.; Wambsganss, J.; Hundertmark, M.; Giannini, E.; Diehl, C.; Tsapras, Y.)
Faint-source-star planetary microlensing: the discovery of the cold gas-giant planet OGLE-2014-BLG-0676Lb
MNRAS 466, 2710(2017)

16.
2/2017
Tsapras, Y.; Arellano Ferro, A. et al.
Variable stars in the bulge globular cluster NGC 6401
MNRAS 465, 2489(2017)

15.
12/2016
Henderson, Calen B.; Poleski, Radosław et al. (inc. Wambsganss, J.; Tsapras, Y.; Schmidt, R.)
Campaign 9 of the K2 Mission: Observational Parameters, Scientific Drivers, and Community Involvement for a Simultaneous Space- and Ground-based Microlensing Survey
PASP 128, l4401(2016)

14.
11/2016
Bennett, D. P.; Rhie, S. H. et al. (inc. Zub, M.; Wambsganss, J.; Tsapras, Y.)
The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(AB)c
AJ 152, 125(2016)

13.
11/2016
Bhattacharya, A.; Bennett, D. P. et al. (inc. Wambsganss, J.; Schmidt, R.; Tsapras, Y.)
Discovery of a Gas Giant Planet in Microlensing Event OGLE-2014-BLG-1760
AJ 152, 140(2016)

12.
11/2016
Shvartzvald, Y.; Li, Z. et al. (inc. Wambsganss, J.; Schmidt, R.; Tsapras, Y.)
The First Simultaneous Microlensing Observations by Two Space Telescopes: Spitzer and Swift Reveal a Brown Dwarf in Event OGLE-2015-BLG-1319
ApJ 831, 183(2016)

11.
9/2016
Han, C.; Udalski, A. et al. (inc. Wambsganss, J.; Schmidt, R.; Figuera Jaimes, R.; Tsapras, Y.)
OGLE-2015-BLG-0479LA,B: Binary Gravitational Microlens Characterized by Simultaneous Ground-based and Space-based Observations
ApJ 828, 53(2016)

10.
8/2016
Anglada-Escudé, Guillem; Amado, Pedro J. et al. (inc. Tsapras, Yiannis)
A terrestrial planet candidate in a temperate orbit around Proxima Centauri
Natur 536, 437(2016)

9.
7/2016
Zhu, Wei; Calchi Novati, S. et al. (inc. Wambsganss, J.; Schmidt, R.; Tsapras, Y.)
Mass Measurements of Isolated Objects from Space-based Microlensing
ApJ 825, 60(2016)

8.
5/2016
Poleski, Radosław; Zhu, Wei et al. (inc. Schmidt, R.; Wambsganss, J.; Tsapras, Y.)
The Spitzer Microlensing Program as a Probe for Globular Cluster Planets: Analysis of OGLE-2015-BLG-0448
ApJ 823, 63(2016)

7.
4/2016
Tsapras, Y.; Hundertmark, M. et al.
The OGLE-III planet detection efficiency from six years of microlensing observations (2003-2008)
MNRAS 457, 1320(2016)

6.
3/2016
Street, R. A.; Udalski, A. et al. (inc. Schmidt, R. ; Wambsganß, J.; Tsapras, Y.)
Spitzer Parallax of OGLE-2015-BLG-0966: A Cold Neptune in the Galactic Disk
ApJ 819, 93 (2016)

5.
12/2015
Shvartzvald, Y.; Udalski, A. et al. (inc. Schmidt, R.; Wambsganss, J.; Tsapras, Y.)
Spitzer Microlens Measurement of a Massive Remnant in a Well-separated Binary
ApJ 814, 111(2015)

4.
8/2015
Ranc, C.; Cassan, A. et al. (inc. Zub, M.; Wambsganss, J.; Tsapras, Y.)
MOA-2007-BLG-197: Exploring the brown dwarf desert
A&A 580, A125(2015)

3.
8/2015
Fukui, A.; Gould, A. et al. (inc. Tsapras, Y.)
OGLE-2012-BLG-0563Lb: A Saturn-mass Planet around an M Dwarf with the Mass Constrained by Subaru AO Imaging
ApJ 809, 74(2015)

2.
12/2009
Batista, V.; Dong, S. et al. (inc. Williams, A.; Tsapras, Y.; Cassan, A.)
Mass measurement of a single unseen star and planetary detection efficiency for OGLE 2007-BLG-050
A&A 508, 467(2009)

1.
11/2009
Han, C.; Hwang, K. -H. et al. (inc. Tsapras, Y.; Burgdorf, M.)
Interpretation of Strong Short-Term Central Perturbations in the Light Curves of Moderate-Magnification Microlensing Events
ApJ 705, 1116(2009)

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