Are Field B-Stars Older than Cluster B-Stars?

Details Are Field B-Stars Older than Cluster B-Stars? Are Field B-Stars Older than Cluster B-Stars?

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.6919h&link_type=abstract

American Astronomical Society Meeting 207, #69.19; Bulletin of the American Astronomical Society, Vol. 37, p.1273

Astronomy and Astrophysics

Astronomy

Scientific paper

Did field B-stars come from dispersed open clusters? Or were they born in a less dense non-cluster environment with no connection to open clusters? The direct result of the former scenario is that field B-stars would be older than cluster B-stars. We have developed a set of spectroscopic diagnostic methods which help us to determine projected equatorial velocities (V sin i), effective temperatures (Teff), and surface gravities (log g) of B-stars. These stellar parameters can help us to establish the stellar evolutionary status of these stars accurately, and, thus, offer us one possible way to learn about the origin of the nearby field B-stars. Large samples of both cluster and field B-stars were investigated by these methods, and some preliminary results are reported.

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