Publications
> Phase-resolved spectroscopic analysis of the eclipsing black hole X-ray binary M33 X-7: System properties, accretion, and evolution
Ramachandran, V.; Oskinova, L. M.; Hamann, W. -R.; Sander, A. A. C.; Todt, H.; Pauli, D.; Shenar, T.; Torrejón, J. M.; Postnov, K. A.; Blondin, J. M.; Bozzo, E.; Hainich, R.; Massa, D.
November 2022
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> Winds of OB stars: impact of metallicity, rotation and binary interaction
Ramachandran, Varsha
November 2022
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> Stellar wind properties of the nearly complete sample of O stars in the low metallicity young star cluster NGC 346 in the SMC galaxy
Rickard, M. J.; Hainich, R.; Hamann, W. -R.; Oskinova, L. M.; Prinja, R. K.; Ramachandran, V.; Pauli, D.; Todt, H.; Sander, A. A. C.; Shenar, T.; Chu, Y. -H.; Gallagher, J. S.
October 2022
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> Ionization and Star Formation in the Giant H II Region SMC-N66
Geist, E.; Gallagher, J. S.; Kotulla, R.; Oskinova, L.; Hamann, W. -R.; Ramachandran, V.; Sabbi, E.; Smith, L.; Kniazev, A.; Nota, A.; Rickard, M. J.
June 2022
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> Repeated Stellar Wind Line Variability in O Stars in the SMC
Rickard, Matthew J.; Pauli, Daniel; Hainich, Rainer; Hamann, Wolf-Rainer; Massa, Derck L.; Oskinova, Lidia; Parsons, Timothy N.; Prinja, Raman K.; Ramachandran, Varsha
June 2022
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> Smoking guns in massive binary evolution: The hunt for Black Holes and Stripped Stars
Ramachandran, Varsha; Sander, Andreas; Bernini Peron, Matheus; Lefever, Roel; Oskinova, Lidia; Pauli, Daniel; Todt, Helge
June 2022
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> The earliest O-type eclipsing binary in the Small Magellanic Cloud, AzV 476: A comprehensive analysis reveals surprisingly low stellar masses
Pauli, D.; Oskinova, L. M.; Hamann, W. -R.; Ramachandran, V.; Todt, H.; Sander, A. A. C.; Shenar, T.; Rickard, M.; Maíz Apellániz, J.; Prinja, R.
March 2022
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> VizieR Online Data Catalog: CARMENES obs. of the binary system LB-1 (Liu+, 2020)
Liu, J.; Zheng, Z.; Soria, R.; Aceituno, J.; Zhang, H.; Lu, Y.; Wang, S.; Hamann, W. -R.; Oskinova, L. M.; Ramachandran, V.; Yuan, H.; Bai, Z.; Wang, S.; McKee, B. J.; Wu, J.; Wang, J.; Lattanzi, M.; Belczynski, K.; Casares, J.; Gonzalez Hernandez, J. I.; Rebolo, R.
November 2021
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> The HST probes the winds and feedback of metal poor OB stars in the tidally stripped Magellanic Bridge
Ramachandran, Varsha; Gallagher, John S.; Hainich, Rainer; Hamann, Wolf-Rainer; Oskinova, Lidia; Sander, Andreas; Shenar, Tomer; Todt, Helge
June 2021
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> The excess of cool supergiants from contemporary stellar evolution models defies the metallicity-independent Humphreys-Davidson limit
Gilkis, Avishai; Shenar, Tomer; Ramachandran, Varsha; Jermyn, Adam S.; Mahy, Laurent; Oskinova, Lidia M.; Arcavi, Iair; Sana, Hugues
May 2021
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> Discovery of O stars in the tidal Magellanic Bridge. Stellar parameters, abundances, and feedback of the nearest metal-poor massive stars and their implication for the Magellanic System ecology
Ramachandran, V.; Oskinova, L. M.; Hamann, W. -R.
February 2021
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> Phase-dependent Study of Near-infrared Disk Emission Lines in LB-1
Liu, Jifeng; Zheng, Zheng; Soria, Roberto; Aceituno, Jesus; Zhang, Haotong; Lu, Youjun; Wang, Song; Hamann, Wolf-Rainer; Oskinova, Lida M.; Ramachandran, Varsha; Yuan, Hailong; Bai, Zhongrui; Wang, Shu; McKee, Brendan J.; Wu, Jianfeng; Wang, Junfeng; Lattanzi, Mario; Belczynski, Krzysztof; Casares, Jorge; González Hernández, Jonay I.; Rebolo, Rafael
September 2020
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> The Wolf-Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud. Spectroscopy, orbital analysis, formation, and evolution (Corrigendum)
Shenar, T.; Sablowski, D. P.; Hainich, R.; Todt, H.; Moffat, A. F. J.; Oskinova, L. M.; Ramachandran, V.; Sana, H.; Sander, A. A. C.; Schnurr, O.; St-Louis, N.; Vanbeveren, D.; Götberg, Y.; Hamann, W. -R.
September 2020
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> Catching wind with the HST: novel UV spectroscopy of a bona fide ultraluminous X-ray source
Oskinova, Lida; Bozzo, Enrico; Bulik, Tomasz; Gies, Douglas Russell; Hamann, Wolf-Rainer; Massa, Derck L.; Ramachandran, Varsha; Sander, Andreas; Shenar, Tomer; Torrejon, Jose Miguel
May 2020
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> The multiplicity and properties of the LMC WC stars: the immediate progenitors of black holes and stripped supernovae
Shenar, Tomer; Dsilva, Karan; Gilkis, Avishai; Hainich, Rainer; Hamann, Wolf-Rainer; Janssens, Soetkin; Mahy, Laurent; Marchant Campos, Pablo Ignacio; Oskinova, Lida; Ramachandran, Varsha; Sander, Andreas; Todt, Helge
May 2020
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> Wolf-Rayet stars in the outskirts of M33: unveiling helium-star evolution and feedback at subsolar metallicity
Sander, Andreas; Pritzkuleit, Max; Hainich, Rainer; Hamann, Wolf-Rainer; Higgins, Erin Rose; Ignace, Richard; Oskinova, Lida; Ramachandran, Varsha; Shenar, Tomer; Todt, Helge; Vink, Jorick
May 2020
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> Testing massive star evolution, star-formation history, and feedback at low metallicity. Photometric analysis of OB stars in the SMC Wing
Fulmer, Leah M.; Gallagher, John S.; Hamann, Wolf-Rainer; Oskinova, Lida M.; Ramachandran, Varsha
January 2020
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> The Wolf-Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud. Spectroscopy, orbital analysis, formation, and evolution
Shenar, T.; Sablowski, D. P.; Hainich, R.; Todt, H.; Moffat, A. F. J.; Oskinova, L. M.; Ramachandran, V.; Sana, H.; Sander, A. A. C.; Schnurr, O.; St-Louis, N.; Vanbeveren, D.; Götberg, Y.; Hamann, W. -R.
July 2019
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> The HST follows galactic influencers: a COS UV survey of the most massive O-stars in the SMC
Oskinova, Lida; Hainich, Rainer; Hamann, Wolf-Rainer; Massa, Derck L.; Prinja, Raman K.; Ramachandran, Varsha; Rickard, Matthew J.; Sander, Andreas; Shenar, Tomer; Todt, Helge
June 2019
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> Testing massive star evolution, star formation history, and feedback at low metallicity. Spectroscopic analysis of OB stars in the SMC Wing
Ramachandran, V.; Hamann, W. -R.; Oskinova, L. M.; Gallagher, J. S.; Hainich, R.; Shenar, T.; Sander, A. A. C.; Todt, H.; Fulmer, L.
May 2019
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> The Galactic WN stars revisited. Impact of Gaia distances on fundamental stellar parameters
Hamann, W. -R.; Gräfener, G.; Liermann, A.; Hainich, R.; Sander, A. A. C.; Shenar, T.; Ramachandran, V.; Todt, H.; Oskinova, L. M.
May 2019
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> VizieR Online Data Catalog: Of-type stars in N206 in the LMC (Ramachandran+, 2018)
Ramachandran, V.; Hainich, R.; Hamann, W. -R.; Oskinova, L. M.; Shenar, T.; Sander, A. A. C.; Todt, H.; Gallagher, J. S.
April 2019
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> VizieR Online Data Catalog: Stellar parameters of OB stars in SMC wing (Ramachandran+, 2019)
Ramachandran, V.; Hamann, W. -R.; Oskinova, L. M.; Gallagher, J. S.; Hainich, R.; Shenar, T.; Sander, A. A. C.; Todt, H.; Fulmer, L.
April 2019
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> Massive star evolution, star formation, and feedback at low metallicity
Ramachandran, Varsha
January 2019
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> PoWR grids of non-LTE model atmospheres for OB-type stars of various metallicities
Hainich, R.; Ramachandran, V.; Shenar, T.; Sander, A. A. C.; Todt, H.; Gruner, D.; Oskinova, L. M.; Hamann, W. -R.
January 2019
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> The extreme O-type spectroscopic binary HD 93129A. A quantitative, multiwavelength analysis
Gruner, D.; Hainich, R.; Sander, A. A. C.; Shenar, T.; Todt, H.; Oskinova, L. M.; Ramachandran, V.; Ayres, T.; Hamann, W. -R.
January 2019
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> The Galactic WC and WO stars. The impact of revised distances from Gaia DR2 and their role as massive black hole progenitors
Sander, A. A. C.; Hamann, W. -R.; Todt, H.; Hainich, R.; Shenar, T.; Ramachandran, V.; Oskinova, L. M.
January 2019
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> VizieR Online Data Catalog: OB stars in N206 in the LMC (Ramachandran+, 2018)
Ramachandran, V.; Hamann, W. -R.; Hainich, R.; Oskinova, L. M.; Shenar, T.; Sander, A. A. C.; Todt, H.; Gallagher, J. S.
September 2018
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> The shortest-period Wolf-Rayet binary in the Small Magellanic Cloud: Part of a high-order multiple system. Spectral and orbital analysis of SMC AB 6
Shenar, T.; Hainich, R.; Todt, H.; Moffat, A. F. J.; Sander, A.; Oskinova, L. M.; Ramachandran, V.; Munoz, M.; Pablo, H.; Sana, H.; Hamann, W. -R.
August 2018
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> Stellar population of the superbubble N 206 in the LMC. II. Parameters of the OB and WR stars, and the total massive star feedback
Ramachandran, V.; Hamann, W. -R.; Hainich, R.; Oskinova, L. M.; Shenar, T.; Sander, A. A. C.; Todt, H.; Gallagher, J. S.
July 2018
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