The discovery of a low mass, pre-main-sequence stellar association around gamma Velorum

Details The discovery of a low mass, pre-main-sequence stellar association around gamma Velorum The discovery of a low mass, pre-main-sequence stellar association around gamma Velorum

2000-02-17

arxiv.org/abs/astro-ph/0002342v1

Astronomy and Astrophysics

Astrophysics

Monthly Notices of the Royal Astronomical Society, Letters - in press

Scientific paper

10.1046/j.1365-8711.2000.03455.x

We report the serendipitous discovery of a population of low mass, pre-main sequence stars (PMS) in the direction of the Wolf-Rayet/O-star binary system gamma^{2} Vel and the Vela OB2 association. We argue that gamma^{2} Vel and the low mass stars are truly associated, are approximately coeval and that both are at distances between 360-490 pc, disagreeing at the 2 sigma level with the recent Hipparcos parallax of gamma^{2} Vel, but consistent with older distance estimates. Our results clearly have implications for the physical parameters of the gamma^{2} Vel system, but also offer an exciting opportunity to investigate the influence of high mass stars on the mass function and circumstellar disc lifetimes of their lower mass PMS siblings.

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