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The Taiwan-American Occultation Survey Project Stellar Variability. I. Detection of Low-Amplitude δ Scuti Stars

Kim, D.-W. and Protopapas, P. and Alcock, C. and Byun, Y.-I. and Kyeong, J. and Lee, B.-C. and Wright, N. J. and Axelrod, T. and Bianco, F. B. and Chen, W.-P. and Coehlo, N. K. and Cook, K. H. and Dave, R. and King, S.-K. and Lee, T. and Lehner, M. J. and Lin, H.-C. and Marshall, S. L. and Porrata, R. and Rice, J. A. and Schwamb, M. E. and Wang, J.-H. and Wang, S.-Y. and Wen, C.-Y. and Zhang, Z.-W. (2010) The Taiwan-American Occultation Survey Project Stellar Variability. I. Detection of Low-Amplitude δ Scuti Stars. Astronomical Journal, 139 (2). pp. 757-764. ISSN 0004-6256. https://resolver.caltech.edu/CaltechAUTHORS:20100208-152335630

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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).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-6256/139/2/757DOIUNSPECIFIED
http://www.iop.org/EJ/abstract/1538-3881/139/2/757/PublisherUNSPECIFIED
Additional Information:© 2010 American Astronomical Society. Print publication: Issue 2 (2010 February); received 2009 September 29; accepted for publication 2009 December 6; published 2010 January 14. Y.-I. Byun acknowledges the support of the National Research Foundation of Korea through Grant 2009-0075376. The work at National Central University was supported by the grant NSC 96-2112-M-008-024-MY3.Work at Academia Sinica was supported in part by the thematic research program AS-88-TPA02. Work at the Harvard College Observatory was supported in part by the National Science Foundation under grant AST- 0501681 and by NASA under grant NNG04G113G. S.L.M.’s work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory in part under Contract W-7405-Eng-48 and by Stanford Linear Accelerator Center under Contract DE-AC02-76SF00515. K. H. Cook’sworkwas performed under the auspices of theU.S. Department of Energy by Lawrence Livermore National Laboratory in part under Contract W-7405-Eng-48 and in part under Contract DE-AC52-07NA27344. We also thank J. D. Hartman at Harvard-Smithsonian Center for Astrophysics for useful discussion. The detrending and the analysis of data sets in this paper were run on the Odyssey cluster supported by the FAS Research Computing Group at the Harvard. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.
Funders:
Funding AgencyGrant Number
National Research Foundation of Korea2009-0075376
National Central University96-2112-M-008-024-MY3
Academica SinicaAS-88-TP-A02
NSFAST-0501681
NASANNG04G113G
U. S. Department of Energy Lawrence Livermore National LaboratoryW-7405-Eng-48
Stanford Linear Accelerator CenterDE-AC02-76SF00515
U. S. Department of Energy Lawrence Livermore National LaboratoryDE-AC52-07NA27344
UNSPECIFIEDDE-AC52-07NA27344
Subject Keywords:stars: variables: delta Scuti; methods: data analysis; surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20100208-152335630
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20100208-152335630
Official Citation: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. Rice, M. E. Schwamb, J.-H. Wang, S.-Y. Wang, C.-Y. Wen, and Z.-W. Zhang 2010 The Astronomical Journal 139 757-764 doi: 10.1088/0004-6256/139/2/757
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17424
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:10 Feb 2010 21:44
Last Modified:03 Oct 2019 01:27

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