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Properties of O dwarf stars in 30 Doradus

Published online by Cambridge University Press:  28 July 2017

Carolina Sabín-Sanjulián  and
the VFTS collaboration
Carolina Sabín-Sanjulián
Affiliation:
Departamento de Física y Astronomía, Universidad de La Serena, Av. Cisternas 1200 Norte, La Serena, Chile Instituto de Investigación Multidisciplinar en Ciencia y Tecnología, Universidad de La Serena, Raúl Bitrán 1305, La Serena, Chile email: [email protected]
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Abstract

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We perform a quantitative spectroscopic analysis of 105 presumably single O dwarf stars in 30 Doradus, located within the Large Magellanic Cloud. We use mid-to-high resolution multi-epoch optical spectroscopic data obtained within the VLT-FLAMES Tarantula Survey. Stellar and wind parameters are derived by means of the automatic tool iacob-gbat, which is based on a large grid of fastwind models. We also benefit from the Bayesian tool bonnsai to estimate evolutionary masses. We provide a spectral calibration for the effective temperature of O dwarf stars in the LMC, deal with the mass discrepancy problem and investigate the wind properties of the sample.

Keywords

Galaxies: Magellanic Clouds Stars: atmospheres Stars: early-type Stars: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 228 - 232
Copyright
Copyright © International Astronomical Union 2017 

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