aa7084-07.pdf (36.95 MB)
New periodic variable stars coincident with ROSAT sources discovered using SuperWASP
journal contribution
posted on 2012-10-24, 09:06 authored 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. SkillenWe 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. 785-905Version
- VoR (Version of Record)
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Astronomy & AstrophysicsPublisher
EDP Sciences for European Southern Observatory (ESO)issn
0004-6361eissn
1432-0746Copyright date
2007Available date
2012-10-24Publisher DOI
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http://www.aanda.org/articles/aa/abs/2007/20/aa7084-07/aa7084-07.htmlLanguage
enAdministrator link
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