δ Scuti-type nature of the high-amplitude variable star GSC4619-450

Details δ Scuti-type nature of the high-amplitude variable star GSC4619-450 δ Scuti-type nature of the high-amplitude variable star GSC4619-450

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006newa...11..508z&link_type=abstract

New Astronomy, Volume 11, Issue 7, p. 508-513.

Astronomy and Astrophysics

Astronomy

97.30.-B, 97.10.Sj, 97.30.Dg, 97.82.Cp

Scientific paper

We present the results of spectroscopy and B, V CCD photometry carried out from 2003 to 2005 of GSC4619-450, a high-amplitude pulsating variable discovered by Zhang et al., [Zhang, X.B., Deng, L., Zhou, X., Xin, Y., 2004. MNRAS, 355, 1369]. From this study, the star is classified as a high-amplitude δ Scuti star. A Fourier analysis based on the B and V photometric data indicates that GSC 4619-450 is a mono-periodic radial pulsator, with a period of 0.13341195 days. From a short time line we find that the pulsating period of this star is increasing rapidly with a rate of 9.1 × 10-2 s/yr, and is thus suggested to be highly evolved and undergoing rapid evolving at the present time. A spectral type of F0 is assigned to the variable considering the results from both the spectroscopy and photometry.

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