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Title:
The University of New South Wales Extrasolar Planet Search: a catalogue of variable stars from fields observed between 2004 and 2007
Authors:
Christiansen, J. L.; Derekas, A.; Kiss, L. L.; Ashley, M. C. B.; Curran, S. J.; Hamacher, D. W.; Hidas, M. G.; Thompson, M. R.; Webb, J. K.; Young, T. B.
Affiliation:
AA(School of Physics, University of New South Wales, Sydney 2052, Australia), AB(School of Physics, University of Sydney, Sydney 2006, Australia), AC(School of Physics, University of Sydney, Sydney 2006, Australia), AD(School of Physics, University of New South Wales, Sydney 2052, Australia), AE(School of Physics, University of New South Wales, Sydney 2052, Australia), AF(School of Physics, University of New South Wales, Sydney 2052, Australia), AG(Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA; Department of Physics, University of California, Santa Barbara, CA 93106, USA), AH(High Performance Computing Support Unit, University of New South Wales, Sydney 2052, Australia), AI(School of Physics, University of New South Wales, Sydney 2052, Australia), AJ(School of Physics, University of New South Wales, Sydney 2052, Australia)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 385, Issue 4, pp. 1749-1763. (MNRAS Homepage)
Publication Date:
04/2008
Origin:
MNRAS
MNRAS Keywords:
stars: AGB and post-AGB , binaries: eclipsing , stars: oscillations , stars: pre-main-sequence , δ Scuti
DOI:
10.1111/j.1365-2966.2008.13013.x
Bibliographic Code:
2008MNRAS.385.1749C

Abstract

We present a new catalogue of variable stars compiled from the data taken for the University of New South Wales Extrasolar Planet Search. From 2004 October to 2007 May, 25 target fields were each observed for one to four months, resulting in ~87000 high-precision light curves with 1600-4400 data points. We have extracted a total of 850 variable light curves, 659 of which do not have a counterpart in the General Catalogue of Variable Stars, the New Suspected Variables catalogue or the All Sky Automated Survey southern variable star catalogue. The catalogue is detailed here, and includes 142 Algol-type eclipsing binaries, 23 β Lyrae-type eclipsing binaries, 218 contact eclipsing binaries, 53 RR Lyrae stars, 26 Cepheid stars, 13 rotationally variable active stars, 153 uncategorized pulsating stars with periods <10 d, including δ Scuti stars, and 222 long period variables with variability on time-scales of >10 d. As a general application of variable stars discovered by extrasolar planet transit search projects, we discuss several astrophysical problems which could benefit from carefully selected samples of bright variables. These include (i) the quest for contact binaries with the smallest mass ratio, which could be used to test theories of binary mergers; (ii) detached eclipsing binaries with pre-main-sequence components, which are important test objects for calibrating stellar evolutionary models and (iii) RR Lyrae-type pulsating stars exhibiting the Blazhko effect, which is one of the last great mysteries of pulsating star research.

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