Be Stars: Comparing Two Techniques to Determine Disk Size

Details Be Stars: Comparing Two Techniques to Determine Disk Size Be Stars: Comparing Two Techniques to Determine Disk Size

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934423g&link_type=abstract

American Astronomical Society, AAS Meeting #219, #344.23

Astronomy and Astrophysics

Astronomy

Scientific paper

Be stars are rapidly rotating B-type stars that lose mass in an equatorial, circumstellar disk (Porter & Rivinius 2003). A fundamental measurement Be star observers desire is the size of this circumstellar disk and the ability to obtain that size with the greatest ease possible. In this poster, we present a comparison of the Grundstrom & Gies (2006) method using the measurement of the equivalent width of H-alpha and the Huang (1972) method of using the measurement of peak separation (which is not useful for stars that have no separate peaks i.e., those that are inclined toward us and those that have copious disks). We discuss dependences on temperature and inclination as well.

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