AAS 206th Meeting, 29 May - 2 June 2005
Session 41 Variable Stars
Poster, Wednesday, 10:00am-7:00pm, Thursday, 9:20am-2:00pm, June 1, 2005, Ballroom A

Previous   |   Session 41   |   Next

[41.01] GALEX Ultraviolet Lightcurves of M-Dwarf Flare Stars

J.M. Wheatley, B.Y. Welsh, S.E. Browne (UC Berkeley), R.D. Robinson (Catholic University of America), M. Seibert (Caltech), R.M. Rich (UCLA), GALEX Science Team

We present several high time-resolution (0.1 s) lightcurves of bright, short-duration (< 1000 s) flare events recorded at ultraviolet wavelengths (1350 - 2750 A) during the first 18 months of observations by the NASA Galaxy Evolution Explorer (GALEX). These outbursts originate on nearby M-dwarf (dMe) flare stars, and can result in a brightening of over 5 UV magnitudes in a period of less than 200 seconds.

We compare and contrast pre and post flare behavior in order to derive meaningful parameters that can be used as a general diagnostic tool of the complex emission structure often exhibited by these outbursts. Finally, we show plots of SDSS (g - r) and GALEX UV magnitudes that can be used to identify previously unknown active dM stars.

GALEX is a NASA Small Explorer. We gratefully acknowledge NASA's support for construction, operation, and science analysis for the GALEX mission.

If you would like more information about this abstract, please follow the link to http://galex.stsci.edu. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: wheat@ssl.berkeley.edu

Previous   |   Session 41   |   Next

Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.