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New periodic variable stars coincident with ROSAT sources discovered using SuperWASP

Norton, A. J.; Wheatley, P. J.; West, R .G.; Haswell, C. A.; Street, R. A.; Collier Cameron, A.; Christian, D. J.; Clarkson, W. I.; Enoch, B.; Gallaway, M.; Hellier, C.; Horne, K. D.; Irwin, J.; Kane, S. R.; Lister, T. A.; Nicholas, J. P.; Parley, N. R.; Pollacco, D.; Ryans, R.; Skillen, I. and Wilson, D. M. (2007). New periodic variable stars coincident with ROSAT sources discovered using SuperWASP. Astronomy and Astrophysics, 467(2) pp. 785–905.

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DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1051/0004-6361:20077084
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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 that 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
ISSN: 1432-0746
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetParticle Physics and Astronomy Research Council (PPARC)
Extra Information: Click here to view other publications available on this repository relating to the SuperWASP Project.
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 8288
Depositing User: Andrew Norton
Date Deposited: 06 Jul 2007
Last Modified: 13 Mar 2012 00:42
URI: http://oro.open.ac.uk/id/eprint/8288
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