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The space density of cataclysmic variables: constraints from the ROSAT North Ecliptic Pole survey
dc.contributor.authorPretorius, M. L.en_US
dc.contributor.authorKnigge, C.en_US
dc.contributor.authorO'Donoghue, D.en_US
dc.contributor.authorHenry, J. P.en_US
dc.contributor.authorGioia, I. M.en_US
dc.contributor.authorMullis, C. R.en_US
dc.date.accessioned2010-06-01T18:19:32Z
dc.date.available2010-06-01T18:19:32Z
dc.date.issued2007-12-11en_US
dc.identifier.citationPretorius, M. L.; Knigge, C.; O'Donoghue, D.; Henry, J. P.; Gioia, I. M.; Mullis, C. R. (2007). "The space density of cataclysmic variables: constraints from the ROSAT North Ecliptic Pole survey." Monthly Notices of the Royal Astronomical Society 382(3): 1279-1288. <http://hdl.handle.net/2027.42/71535>en_US
dc.identifier.issn0035-8711en_US
dc.identifier.issn1365-2966en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/71535
dc.description.abstractWe use the ROSAT North Ecliptic Pole (NEP) survey to construct a small, but purely X-ray flux-limited sample of cataclysmic variable stars (CVs). The sample includes only four systems, two of which (RX J1715.6+6856 and RX J1831.7+6511) are new discoveries. We present time-resolved spectroscopy of the new CVs and measure orbital periods of 1.64 ± 0.02 and 4.01 ± 0.03 h for RX J1715.6+6856 and RX J1831.7+6511, respectively. We also estimate distances for all the CVs in our sample, based mainly on their apparent brightness in the infrared. The space density of the CV population represented by our small sample is 1.1 +2.3 −0.7 × 10 −5  pc −3 . We can also place upper limits on the space density of any subpopulation of CVs too faint to be included in the NEP survey. In particular, we show that if the overall space density of CVs is as high as 2 × 10 −4  pc −3 (as has been predicted theoretically), the vast majority of CVs must be fainter than L X ≃ 2 × 10 29  erg s −1 .en_US
dc.format.extent665535 bytes
dc.format.extent3109 bytes
dc.format.mimetypeapplication/pdf
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dc.publisherBlackwell Publishing Ltden_US
dc.rights2007 The Authors. Journal compilation © 2007 RASen_US
dc.subject.otherBinaries: Closeen_US
dc.subject.otherStars: Dwarf Novaeen_US
dc.subject.otherNovae, Cataclysmic Variablesen_US
dc.titleThe space density of cataclysmic variables: constraints from the ROSAT North Ecliptic Pole surveyen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelAstronomyen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Astronomy, University of Michigan, 918 Dennison, 500 Church Street, Ann Arbor, MI 48109-1042, USAen_US
dc.contributor.affiliationotherSchool of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJen_US
dc.contributor.affiliationotherSouth African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africaen_US
dc.contributor.affiliationotherInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAen_US
dc.contributor.affiliationotherINAF – Istituto di Radioastronomia del CNR, Via Gobetti 101, I-40129 Bologna, Italyen_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/71535/1/j.1365-2966.2007.12461.x.pdf
dc.identifier.doi10.1111/j.1365-2966.2007.12461.xen_US
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