Dr. Varsha Ramachandran

17.

10/2024
Reyero Serantes, S.; Oskinova, L. et al. (inc. Sander, A. A. C.; Ramachandran, V.)
Multi-wavelength spectroscopic analysis of the ULX Holmberg II X-1 and its nebula suggests the presence of a heavy black hole accreting from a B-type donor
A&A 690, A347(2024)

16.

10/2024
Shenar, T.; Bodensteiner, J. et al. (inc. Schösser, E. C.; Schneider, F. R. N.; Sander, A. A. C.; Ramachandran, V.; Lefever, R. R.; Josiek, J.; González-Torà, G.; Bronner, V. A.; Bernini-Peron, M.)
Binarity at LOw Metallicity (BLOeM): A spectroscopic VLT monitoring survey of massive stars in the SMC
A&A 690, A289(2024)

15.

10/2024
Telford, O. Grace; Chisholm, John et al. (inc. Ramachandran, Varsha; Sander, Andreas A. C.)
Observations of Extremely Metal-poor O Stars: Weak Winds and Constraints for Evolution Models
ApJ 974, 85(2024)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)