The Curious Case of GSC3196-641: Double-mode RR Lyrae or a Spotted Rotating Star?

Details The Curious Case of GSC3196-641: Double-mode RR Lyrae or a Spotted Rotating Star? The Curious Case of GSC3196-641: Double-mode RR Lyrae or a Spotted Rotating Star?

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.2920k&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #29.20; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

GSC 3196-641 (α=21 41 25.412, β=+43 43 23.86) is a curious variable star that is not strictly periodic. It shows modulations in the light curve which suggest either double-mode pulsations or star spots. It may be associated with a ROSAT X-ray source. A low-resolution spectrum indicates it is a G7III-type star but does not show the CaII H & K line emission that one would expect from coronal activity. In this poster we present precision photometric observations, low-resolution spectra and frequency analysis.

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