Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 29-36 |
| Number of pages | 8 |
| Journal | Astrophysics and Space Science |
| Volume | 305 |
| Issue number | 1 |
| DOIs | |
| State | Published - Sep 2006 |
Bibliographical note
Funding Information:Acknowledgements We would like to thank the MDM Observatory for generous time allocation. This work has been supported by National Science Foundation under Grant No. 0307480. AYZ was partly supported by the project No. 10273014. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.
Keywords
- Stars: individual: GSC2.2 N033131287450
- Stars: oscillations
- Stars: variable: δ Scuti stars