Discovery of a New Multiperiodic δ Scuti Variable Star
We report on the discovery of a new short-periodic pulsating variable star in the field of the pulsating sdB star KPD 2109+4401. The star was observed on 10 consecutive nights. Based on the light curves, we detect three pulsation frequencies at 10.308, 4.023 and 11.075 cycle d−1 with amplitudes of 11.1, 4.3 and 4.2 milli-magnitudes, respectively. Using the existing data from other sky surveys, we estimate a spectral type of late F and other atmospheric parameters. Then we discuss the observational properties of the star. Finally it is classified to be a new low-amplitude multiperiodic δ Scuti star. A future interest addressed is to accurately determine the star's spectral type and then to judge a possible link to γ Doradus-type pulsation.
Physics, Astronomy, and Materials Science
variable stars, oscillations, star GSC2.2 N033131287450
Zhou, A-Y., D. An, J. R. Eggen, M. D. Reed, D. M. Terndrup, and S. L. Harms. "Discovery of a New Multiperiodic δ Scuti Variable Star." Astrophysics and Space Science 305, no. 1 (2006): 29-36.
Astrophysics and Space Science