THE TAIWAN-AMERICAN OCCULTATION SURVEY PROJECT STELLAR VARIABILITY. I. DETECTION OF LOW-AMPLITUDE {delta} SCUTI STARS
- Harvard Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)
- Department of Astronomy, Yonsei University, Seoul 120-749 (Korea, Republic of)
- Korea Astronomy and Space Science Institute, Daejeon 305-348 (Korea, Republic of)
- Steward Observatory, 933 North Cherry Avenue, Room N204 Tucson, AZ 85721 (United States)
- Institute of Astronomy, National Central University, No. 300, Jhongda Rd, Jhongli City, Taoyuan County 320, Taiwan (China)
- Department of Statistics, University of California Berkeley, 367 Evans Hall, Berkeley, CA 94720 (United States)
- Institute for Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States)
- Initiative in Innovative Computing, School of Engineering and Applied Sciences, Harvard, Cambridge, MA 02138 (United States)
- Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 106, Taiwan (China)
- Department of Astronomy, University of California Berkeley, 601 Campbell Hall, Berkeley, CA 94720 (United States)
We analyzed data accumulated during 2005 and 2006 by the Taiwan-American Occultation Survey (TAOS) in order to detect short-period variable stars (periods of {approx}<1 hr) such as {delta} Scuti. TAOS is designed for the detection of stellar occultation by small-size Kuiper Belt Objects and is operating four 50 cm telescopes at an effective cadence of 5 Hz. The four telescopes simultaneously monitor the same patch of the sky in order to reduce false positives. To detect short-period variables, we used the fast Fourier transform algorithm (FFT) in as much as the data points in TAOS light curves are evenly spaced. Using FFT, we found 41 short-period variables with amplitudes smaller than a few hundredths of a magnitude and periods of about an hour, which suggest that they are low-amplitude {delta} Scuti stars. The light curves of TAOS {delta} Scuti stars are accessible online at the Time Series Center Web site (http://timemachine.iic.harvard.edu)
- OSTI ID:
- 21301341
- Journal Information:
- Astronomical Journal (New York, N.Y. Online), Vol. 139, Issue 2; Other Information: DOI: 10.1088/0004-6256/139/2/757; Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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