Properties of O dwarf stars in 30 Doradus
C. Sab\'in-Sanjuli\'an
TL;DR
This study analyzes 105 O dwarf stars in 30 Doradus using spectroscopic data to determine their properties, address the mass discrepancy, and explore their wind characteristics, providing new calibrations and insights into these massive stars.
Contribution
It offers a new spectral calibration for O dwarf stars in the LMC and addresses the mass discrepancy problem using advanced modeling and Bayesian analysis.
Findings
Derived stellar and wind parameters for 105 O dwarfs
Provided a new spectral calibration for effective temperature
Investigated and discussed the mass discrepancy problem
Abstract
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.
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