THE TAIWANESE-AMERICAN OCCULTATION SURVEY PROJECT STELLAR VARIABILITY. II. DETECTION OF 15 VARIABLE STARS

Journal Article · Sat May 15 00:00:00 EDT 2010 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/139/5/2026· OSTI ID:21443116

Mondal, S; Lin, C C; Chen, W P; Zhang, Z -W; Lin, H -C ^[1]; Alcock, C; Bianco, F B; Lehner, M J; Protopapas, P ^[2]; Axelrod, T ^[3]; Byun, Y -I; Kim, D -W ^[4]; Coehlo, N K; Rice, J A ^[5]; Cook, K H; Marshall, S L ^[6]; Dave, R ^[7]; King, S -K; Lee, T ^[8]

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1. Institute of Astronomy, National Central University, 300 Jhongda Road, Jhongli 32054, Taiwan (China)
2. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
3. Steward Observatory, 933 North Cherry Avenue, Room N204, Tucson, AZ 85721 (United States)
4. Department of Astronomy, Yonsei University, 134 Shinchon, Seoul 120-749 (Korea, Republic of)
5. Department of Statistics, University of California Berkeley, 367 Evans Hall, Berkeley, CA 94720 (United States)
6. Institute for Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States)
7. Initiative in Innovative Computing at Harvard, 120 Oxford Street, Cambridge, MA 02138 (United States)
8. Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 106, Taiwan (China)

The Taiwanese-American Occultation Survey (TAOS) project has collected more than a billion photometric measurements since 2005 January. These sky survey data-covering timescales from a fraction of a second to a few hundred days-are a useful source to study stellar variability. A total of 167 star fields, mostly along the ecliptic plane, have been selected for photometric monitoring with the TAOS telescopes. This paper presents our initial analysis of a search for periodic variable stars from the time-series TAOS data on one particular TAOS field, No. 151 (R.A. = 17{sup h}30{sup m}6.{sup s}7, decl. = 27{sup 0}17'30'', J2000), which had been observed over 47 epochs in 2005. A total of 81 candidate variables are identified in the 3 deg{sup 2} field, with magnitudes in the range 8 < R < 16. On the basis of the periodicity and shape of the light curves, 29 variables, 15 of which were previously unknown, are classified as RR Lyrae, Cepheid, {delta} Scuti, SX Phonencis, semi-regular, and eclipsing binaries.

• OSTI ID: 21443116
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 139, Issue 5; Other Information: DOI: 10.1088/0004-6256/139/5/2026; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CEPHEIDS
DATA ANALYSIS
ECLIPSE
PERIODICITY
TELESCOPES
PULSATING VARIABLE STARS
STARS
VARIABLE STARS
VARIATIONS