The Taiwan-American occultation survey project stellar variability. I. Detection of low-amplitude δ Scuti stars

D. W. Kim, P. Protopapas, C. Alcock, Y. I. Byun, J. Kyeong, B. C. Lee, N. J. Wright, T. Axelrod, F. B. Bianco, W. P. Chen, N. K. Coehlo, K. H. Cook, R. Dave, S. K. King, T. Lee, M. J. Lehner, H. C. Lin, S. L. Marshall, R. Porrata, J. A. RiceM. E. Schwamb, J. H. Wang, S. Y. Wang, C. Y. Wen, Z. W. Zhang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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 ≲1 hr) such as δ 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 δ Scuti stars. The light curves of TAOS δ Scuti stars are accessible online at the Time Series Center Web site (http://timemachine.iic.harvard.edu).

Original languageEnglish
Pages (from-to)757-764
Number of pages8
JournalAstronomical Journal
Volume139
Issue number2
DOIs
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Kim, D. W., Protopapas, P., Alcock, C., Byun, Y. I., Kyeong, J., Lee, B. C., Wright, N. J., Axelrod, T., Bianco, F. B., Chen, W. P., Coehlo, N. K., Cook, K. H., Dave, R., King, S. K., Lee, T., Lehner, M. J., Lin, H. C., Marshall, S. L., Porrata, R., ... Zhang, Z. W. (2010). The Taiwan-American occultation survey project stellar variability. I. Detection of low-amplitude δ Scuti stars. Astronomical Journal, 139(2), 757-764. https://doi.org/10.1088/0004-6256/139/2/757