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New periodic variable stars coincident with ROSAT sources discovered using SuperWASP
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(2007) New periodic variable stars coincident with ROSAT sources discovered using SuperWASP. Astronomy & Astrophysics, Vol.467 (No.2). pp. 785-905. doi:10.1051/0004-6361:20077084 ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361:20077084
Abstract
We present optical lightcurves of 428 periodic variable stars coincident with ROSAT X-ray sources, detected using the first run of the SuperWASP photometric survey. Only 68 of these were previously recognised as periodic variables. A further 30 of these objects are previously known pre-main sequence stars, for which we detect a modulation period for the first time. Amongst the newly identified periodic variables, many appear to be close eclipsing binaries, their X-ray emission is presumably the result of RS CVn type behaviour. Others are probably BY Dra stars, pre-main sequence stars and other rapid rotators displaying enhanced coronal activity. A number of previously catalogued pulsating variables (RR Lyr stars and Cepheids) coincident with X-ray sources are also seen, but we show hat these are likely to be misclassifications. We identify four objects which are probable low mass eclipsing binary stars, based on
their very red colour and light curve morphology.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Variable stars, X-ray sources, Galactic, Eclipsing binaries | ||||
Journal or Publication Title: | Astronomy & Astrophysics | ||||
Publisher: | EDP Sciences | ||||
ISSN: | 0004-6361 | ||||
Official Date: | May 2007 | ||||
Dates: |
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Volume: | Vol.467 | ||||
Number: | No.2 | ||||
Page Range: | pp. 785-905 | ||||
DOI: | 10.1051/0004-6361:20077084 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Funder: | Queen's University of Belfast, University of Keele, University of St. Andrews, University of Leicester, Open University, Royal Greenwich Observatory. Isaac Newton Group of Telescopes (Santa Cruz de la Palma, Canary Islands), Instituto de Astrofísica de Canarias, South African Astronomical Observatory (SAAO), Particle Physics and Astronomy Research Council (Great Britain) (PPARC) |
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