Spectroscopic Hα Survey of Field Be Stars: 2004-2008

Details Spectroscopic Hα Survey of Field Be Stars: 2004-2008 Spectroscopic Hα Survey of Field Be Stars: 2004-2008

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21443106g&link_type=abstract

American Astronomical Society, AAS Meeting #214, #431.06; Bulletin of the American Astronomical Society, Vol. 41, p.702

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Be stars are rapidly rotating B-type stars that lose mass in an equatorial, circumstellar disk (Porter & Rivinius 2003). Since the fall of 2004, we have been spectroscopically observing a set of 115 field Be stars every two years with the Kitt Peak Coude Feed telescope. This time baseline allows for examination of variability properties of the circumstellar disks. We find that 90% of the observed stars show some variability with only 4% showing significant variability over the 4-year baseline. Such values may be compared with the significant variability seen in some clusters such as NGC 3766 (McSwain et al. 2008).
This work has been supported in part by a grant from the Vanderbilt University Learning Sciences Institute, NASA grant # NNX08AV70G, and NSF Career grant AST-0349075.

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