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New periodic variable stars coincident with ROSAT sources discovered using SuperWASP

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journal contribution
posted on 24.10.2012, 09:06 by A. J. Norton, C. A. Haswell, B. Enoch, M. Gallaway, P. J. Wheatley, J. P. Nicholas, R. G. West, R. A. Street, D. J. Christian, D. Pollacco, R. Ryans, Collier Cameron A, K. Horne, W. I. Clarkson, C. Hellier, T. A. Lister, D. M. Wilson, J. Irwin, S. R. Kane, N. Parley, I. Skillen
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.

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Citation

Astronomy & Astrophysics, 2007, 467 (2), pp. 785-905

Version

VoR (Version of Record)

Published in

Astronomy & Astrophysics

Publisher

EDP Sciences for European Southern Observatory (ESO)

issn

0004-6361

eissn

1432-0746

Copyright date

2007

Available date

24/10/2012

Publisher version

http://www.aanda.org/articles/aa/abs/2007/20/aa7084-07/aa7084-07.html

Language

en

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