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Search for high-amplitude δ Scuti and RR Lyrae stars in Sloan Digital Sky Survey Stripe 82 using principal component analysis

Süveges, M. and Sesar, B. and Váradi, M. and Mowlavi, N. and Becker, A. C. and Ivezić, Ž. and Beck, M. and Nienartowicz, K. and Rimoldini, L. and Dubath, P. and Bartholdi, P. and Eyer, L. (2012) Search for high-amplitude δ Scuti and RR Lyrae stars in Sloan Digital Sky Survey Stripe 82 using principal component analysis. Monthly Notices of the Royal Astronomical Society, 424 (4). pp. 2528-2550. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20120925-105519514

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Abstract

We propose a robust principal component analysis framework for the exploitation of multiband photometric measurements in large surveys. Period search results are improved using the time-series of the first principal component due to its optimized signal-to-noise ratio. The presence of correlated excess variations in the multivariate time-series enables the detection of weaker variability. Furthermore, the direction of the largest variance differs for certain types of variable stars. This can be used as an efficient attribute for classification. The application of the method to a subsample of Sloan Digital Sky Survey Stripe 82 data yielded 132 high-amplitude δ Scuti variables. We also found 129 new RR Lyrae variables, complementary to the catalogue of Sesar et al., extending the halo area mapped by Stripe 82 RR Lyrae stars towards the Galactic bulge. The sample also comprises 25 multiperiodic or Blazhko RR Lyrae stars.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1365-2966.2012.21229.xDOIArticle
ORCID:
AuthorORCID
Sesar, B.0000-0002-0834-3978
Additional Information:© 2012 The Authors. Monthly Notices of the Royal Astronomical Society © 2012 RAS. Accepted 2012 May 2. Received 2012 April 27; in original form 2012 February 14. MS wishes to thank J. Jurcsik and G. Kovács for helpful discussions, and the two referees for their constructive suggestions. The work was supported by the Swiss National Science Foundation MHV grant PMPDP2_129178. Funding for SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the US Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The SDSS website is http://www.sdss.org/. SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions. The Participating Institutions are the American Museum of Natural History, Astrophysical Institute Potsdam, University of Basel, University of Cambridge, Case Western Reserve University, University of Chicago, Drexel University, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The Johns Hopkins University, the Joint Institute for Nuclear Astrophysics, the Kavli Institute for Particle Astrophysics and Cosmology, the Korean Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory, the Max Planck Institute for Astronomy (MPIA), the Max Planck Institute for Astrophysics (MPA), New Mexico State University, Ohio State University, University of Pittsburgh, University of Portsmouth, Princeton University, the United States Naval Observatory, and the University of Washington.
Funders:
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)PMPDP2_129178
Subject Keywords:methods: data analysis; methods: statistical; surveys; stars: variables: δ Scuti; stars: variables: RR Lyrae
Issue or Number:4
Record Number:CaltechAUTHORS:20120925-105519514
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120925-105519514
Official Citation:Süveges, M., Sesar, B., Váradi, M., Mowlavi, N., Becker, A. C., Ivezić, Ž., Beck, M., Nienartowicz, K., Rimoldini, L., Dubath, P., Bartholdi, P. and Eyer, L. (2012), Search for high-amplitude δ Scuti and RR Lyrae stars in Sloan Digital Sky Survey Stripe 82 using principal component analysis. Monthly Notices of the Royal Astronomical Society, 424: 2528–2550. doi: 10.1111/j.1365-2966.2012.21229.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34347
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:25 Sep 2012 21:29
Last Modified:03 Oct 2019 04:18

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