Dr. Varsha Ramachandran
Astronomisches Rechen-Institut
Telefon
Büro
Neubau, Room N.E-04
Post-Adresse
Zentrum für Astronomie der Universität Heidelberg
Astronomisches Rechen-Institut
Mönchhofstr. 12-14
69120 Heidelberg
Astronomisches Rechen-Institut
Mönchhofstr. 12-14
69120 Heidelberg
ORCID
Forschungsgebiete
Massive Stars, Binaries, Stellar Atmospheres, Stellar Winds and Feedback, Spectroscopy, Stellar Evolution, High mass X-ray binary, Star formation history, Chemical abundance, Superbubbles and Shells, Magellanic Clouds, Low metallicity dwarf galaxies
14.
9/2024
Martins, F.; Bouret, J. -C. et al. (inc. Sander, A. A. C.; Ramachandran, V.)
X-Shooting ULLYSES: Massive stars at low metallicity: V. Effect of metallicity on surface abundances of O stars
A&A 689, A31(2024)
Martins, F.; Bouret, J. -C. et al. (inc. Sander, A. A. C.; Ramachandran, V.)
X-Shooting ULLYSES: Massive stars at low metallicity: V. Effect of metallicity on surface abundances of O stars
A&A 689, A31(2024)
13.
9/2024
Sander, A. A. C.; Bouret, J. -C. et al. (inc. Schösser, E. C.; Lefever, R. R.; Larkin, C. J. K.; Ramachandran, V.; Bernini-Peron, M.)
X-Shooting ULLYSES: Massive stars at low metallicity: IV. Spectral analysis methods and exemplary results for O stars
A&A 689, A30(2024)
Sander, A. A. C.; Bouret, J. -C. et al. (inc. Schösser, E. C.; Lefever, R. R.; Larkin, C. J. K.; Ramachandran, V.; Bernini-Peron, M.)
X-Shooting ULLYSES: Massive stars at low metallicity: IV. Spectral analysis methods and exemplary results for O stars
A&A 689, A30(2024)
12.
8/2024
Sana, H.; Tramper, F. et al. (inc. Sander, A. A. C.; Ramachandran, V.; Larkin, C. J. K.)
X-Shooting ULLYSES: Massive stars at low metallicity. II. DR1: Advanced optical data products for the Magellanic Clouds
A&A 688, A104(2024)
Sana, H.; Tramper, F. et al. (inc. Sander, A. A. C.; Ramachandran, V.; Larkin, C. J. K.)
X-Shooting ULLYSES: Massive stars at low metallicity. II. DR1: Advanced optical data products for the Magellanic Clouds
A&A 688, A104(2024)
11.
8/2024
Vieu, T.; Larkin, C. J. K. et al. (inc. Ramachandran, V.; Sander, A. A. C.)
Hydrodynamic simulation of Cygnus OB2: the absence of a cluster wind termination shock
MNRAS 532, 2174(2024)
Vieu, T.; Larkin, C. J. K. et al. (inc. Ramachandran, V.; Sander, A. A. C.)
Hydrodynamic simulation of Cygnus OB2: the absence of a cluster wind termination shock
MNRAS 532, 2174(2024)
10.
9/2023
Bernini-Peron, M.; Marcolino, W. L. F. et al. (inc. Schneider, F. R. N.; Ramachandran, V.; Sander, A. A. C.)
Clumping and X-rays in cooler B supergiant stars
A&A 677, A50(2023)
Bernini-Peron, M.; Marcolino, W. L. F. et al. (inc. Schneider, F. R. N.; Ramachandran, V.; Sander, A. A. C.)
Clumping and X-rays in cooler B supergiant stars
A&A 677, A50(2023)
9.
7/2023
Vink, Jorick S.; Mehner, A. et al. (inc. Ramachandran, V.; Lefever, R. R.; Larkin, C. J. K.; Bernini-Peron, M.; Sander, A. A. C.)
X-Shooting ULLYSES: Massive stars at low metallicity. I. Project description
A&A 675, A154(2023)
Vink, Jorick S.; Mehner, A. et al. (inc. Ramachandran, V.; Lefever, R. R.; Larkin, C. J. K.; Bernini-Peron, M.; Sander, A. A. C.)
X-Shooting ULLYSES: Massive stars at low metallicity. I. Project description
A&A 675, A154(2023)
8.
6/2023
Ramachandran, V.; Klencki, J. et al. (inc. Sander, A. A. C.)
A partially stripped massive star in a Be binary at low metallicity. A missing link towards Be X-ray binaries and double neutron star mergers
A&A 674, L12(2023)
Ramachandran, V.; Klencki, J. et al. (inc. Sander, A. A. C.)
A partially stripped massive star in a Be binary at low metallicity. A missing link towards Be X-ray binaries and double neutron star mergers
A&A 674, L12(2023)
7.
5/2023
Pauli, D.; Oskinova, L. M. et al. (inc. Ramachandran, V.; Sander, A. A. C.)
Spectroscopic and evolutionary analyses of the binary system AzV 14 outline paths toward the WR stage at low metallicity
A&A 673, A40(2023)
Pauli, D.; Oskinova, L. M. et al. (inc. Ramachandran, V.; Sander, A. A. C.)
Spectroscopic and evolutionary analyses of the binary system AzV 14 outline paths toward the WR stage at low metallicity
A&A 673, A40(2023)
6.
2/2023
Geen, Sam; Agrawal, Poojan et al. (inc. Ramachandran, Varsha; Keller, B. W.)
Bringing Stellar Evolution and Feedback Together: Summary of Proposals from the Lorentz Center Workshop
PASP 135, b1001(2023)
Geen, Sam; Agrawal, Poojan et al. (inc. Ramachandran, Varsha; Keller, B. W.)
Bringing Stellar Evolution and Feedback Together: Summary of Proposals from the Lorentz Center Workshop
PASP 135, b1001(2023)
5.
2/2023
Sander, A. A. C.; Lefever, R. R. et al. (inc. Ramachandran, V.; Poniatowski, L. G.)
The temperature dependency of Wolf-Rayet-type mass loss. An exploratory study for winds launched by the hot iron bump
A&A 670, A83(2023)
Sander, A. A. C.; Lefever, R. R. et al. (inc. Ramachandran, V.; Poniatowski, L. G.)
The temperature dependency of Wolf-Rayet-type mass loss. An exploratory study for winds launched by the hot iron bump
A&A 670, A83(2023)
4.
11/2022
Ramachandran, V.; Oskinova, L. M. et al. (inc. Sander, A. A. C.)
Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
A&A 667, A77(2022)
Ramachandran, V.; Oskinova, L. M. et al. (inc. Sander, A. A. C.)
Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
A&A 667, A77(2022)
3.
10/2022
Rickard, M. J.; Hainich, R. et al. (inc. Sander, A. A. C.; Ramachandran, V.)
Stellar wind properties of the nearly complete sample of O stars in the low metallicity young star cluster NGC 346 in the SMC galaxy
A&A 666, A189(2022)
Rickard, M. J.; Hainich, R. et al. (inc. Sander, A. A. C.; Ramachandran, V.)
Stellar wind properties of the nearly complete sample of O stars in the low metallicity young star cluster NGC 346 in the SMC galaxy
A&A 666, A189(2022)
2.
6/2022
Geist, E.; Gallagher, J. S. et al. (inc. Ramachandran, V.)
Ionization and Star Formation in the Giant H II Region SMC-N66
PASP 134, f4301(2022)
Geist, E.; Gallagher, J. S. et al. (inc. Ramachandran, V.)
Ionization and Star Formation in the Giant H II Region SMC-N66
PASP 134, f4301(2022)
1.
3/2022
Pauli, D.; Oskinova, L. M. et al. (inc. Sander, A. A. C.; Ramachandran, V.)
The earliest O-type eclipsing binary in the Small Magellanic Cloud, AzV 476: A comprehensive analysis reveals surprisingly low stellar masses
A&A 659, A9(2022)
Pauli, D.; Oskinova, L. M. et al. (inc. Sander, A. A. C.; Ramachandran, V.)
The earliest O-type eclipsing binary in the Small Magellanic Cloud, AzV 476: A comprehensive analysis reveals surprisingly low stellar masses
A&A 659, A9(2022)