SIMBAD references

2020MNRAS.493.1512R - Mon. Not. R. Astron. Soc., 493, 1512-1529 (2020/March-3)

Unlocking Galactic Wolf-Rayet stars with Gaia DR2 - I. Distances and absolute magnitudes.


Abstract (from CDS):

We obtain distances to 383 Galactic Wolf-Rayet (WR) stars from Gaia DR2 parallaxes and Bayesian methods, with a prior based on H II regions and dust extinction. Distances agree with those from Bailer-Jones et al. for stars up to 2 kpc from the Sun, though deviate thereafter due to differing priors, leading to modest reductions in luminosities for recent WR spectroscopic results. We calculate visual and K-band absolute magnitudes, accounting for dust extinction contributions and binarity, and identify 187 stars with reliable absolute magnitudes. For WR and O stars within 2 kpc, we find a WR/O ratio of 0.09. The distances are used to generate absolute magnitude calibrations and obtain the Gaia colour-magnitude diagram for WR stars. Average vWR-band absolute magnitudes for WN stars range from -3.6 mag (WN3-4) to -7.0 mag (WN8-9ha), and -3.1 (WO2-4) to -4.6 mag (WC9), with standard deviations of ∼0.6 mag. Using H II region scale heights, we identify 31 WR stars at large (3σ, |z| >= 156 pc) distances from the mid-plane as potential runaways accounting for the Galactic warp, of which only four involve WN8-9 stars, contrary to previous claims.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: distances - stars: massive - stars: Wolf-Rayet - Galaxy: disc

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

CDS comments: WR20-2, WR43-2, WR43-3, WR64-4 and WR70-5 are not in Simbad.

Simbad objects: 89

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