Metallicity vs. Be phenomenon relation in the solar neighborhood

Details Metallicity vs. Be phenomenon relation in the solar neighborhood Metallicity vs. Be phenomenon relation in the solar neighborhood

2006-01-04

arxiv.org/abs/astro-ph/0601071v1

Astronomy and Astrophysics

Astrophysics

3 pages ; to appear in the proceedings of the Sapporo meeting on active OB stars ; ASP Conference Series ; eds: S. Stefl, S. O

Scientific paper

Fast rotation seems to be the mayor factor to trigger the Be phenomenon. Surface fast rotation can be favored by initial formation conditions, such as abundance of metals. We have observed 118 Be stars up to the apparent magnitudes V=9 mag. Models of fast rotating atmospheres and evolutionary tracks were used to interpret the stellar spectra and to determine the stellar fundamental parameters. Since the studied stars are formed in regions that are separated enough to imply some non negligible gradient of galactic metallicity, we study the effects of possible incidence of this gradient on the nature as rotators of the studied stars.

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