The O stars in the VLT-FLAMES Tarantula Survey

A. De Koter*, H. Sana, C. J. Evans, T. Bagnoli, N. Bastian, J. M. Bestenlehner, A. Bonanos, E. Bressert, I. Brott, M. Cantiello, G. Carraro, S. Clark, P. Crowther, S. E. De Mink, E. Doran, P. Dufton, P. Dunstall, M. Garcia, G. Gräfener, V. Hénault-BrunetA. Herrero, I. Howarth, R. Izzard, K. Köhler, N. Langer, D. Lennon, J. Maíz Apellániz, N. Markova, P. Najarro, J. Puls, O. Ramirez, C. Sabín-Sanjulián, S. Simón-Díaz, S. Smartt, V. Stroud, J. Th Van Loon, W. Taylor, J. S. Vink

*Corresponding author for this work

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5 Citations (Scopus)

Abstract

The VLT-FLAMES Tarantula Survey (VFTS) has secured mid-resolution spectra of over 300 O-type stars in the 30 Doradus region of the Large Magellanic Cloud. A homogeneous analysis of such a large sample requires automated techniques, an approach that will also be needed for the upcoming analysis of the Gaia surveys of the Northern and Southern Hemisphere supplementing the Gaia measurements. We point out the importance of Gaia for the study of O stars, summarize the O star science case of VFTS and present a test of the automated modeling technique using synthetically generated data. This method employs a genetic algorithm based optimization technique in combination with fastwind model atmospheres. The method is found to be robust and able to recover the main photospheric parameters accurately. Precise wind parameters can be obtained as well, however, as expected, for dwarf stars the rate of acceleration of the ow is poorly constrained.

Original languageEnglish
Article number012022
JournalJournal of Physics: Conference Series
Volume328
Issue number1
DOIs
Publication statusPublished - 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    De Koter, A., Sana, H., Evans, C. J., Bagnoli, T., Bastian, N., Bestenlehner, J. M., Bonanos, A., Bressert, E., Brott, I., Cantiello, M., Carraro, G., Clark, S., Crowther, P., De Mink, S. E., Doran, E., Dufton, P., Dunstall, P., Garcia, M., Gräfener, G., ... Vink, J. S. (2011). The O stars in the VLT-FLAMES Tarantula Survey. Journal of Physics: Conference Series, 328(1), [012022]. https://doi.org/10.1088/1742-6596/328/1/012022