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dc.contributor.authorServillat, M.
dc.contributor.authorGrindlay, J.
dc.contributor.authorvan den Berg, M.
dc.contributor.authorHong, J.
dc.contributor.authorZhao, P.
dc.contributor.authorAllen, B.
dc.date.accessioned2019-09-25T14:12:27Z
dc.date.issued2012
dc.identifier.citationServillat, M., J. Grindlay, M. van den Berg, J. Hong, P. Zhao, and B. Allen. 2012. “SPECTROSCOPIC FOLLOW-UP OF X-RAY SOURCES IN THE ChaMPlane SURVEY: IDENTIFICATION OF A NEW CATACLYSMIC VARIABLE.” The Astrophysical Journal 748 (1): 32. https://doi.org/10.1088/0004-637x/748/1/32.
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41399795*
dc.description.abstractWe present a multi-object optical spectroscopy follow-up study of X-ray sources in a field along the Galactic plane (l = 327 degrees.42, b = 2 degrees.26) which is part of the Chandra Multi-wavelength Plane survey (ChaMPlane). We obtained spectra for 46 stars, including 15 likely counterparts to X-ray sources, and sources showing an Ha color excess. This has led to the identification of a new cataclysmic variable (CV), CXOPS J154305.5-522709, also named ChaMPlane Bright Source 7 (CBS 7), and we identified eight X-ray sources in the field as active late-type stars. CBS 7 was previously studied in X-rays and showed a hard spectrum and two periods: 1.22 +/- 0.08 hr and 2.43 +/- 0.26 hr. We present here clear evidence that the source is a CV through the detection of H, He I, and He II emission lines in its optical spectrum. The hard X-ray spectrum and the presence of the He II lambda 4686 in emission with a large equivalent width suggest a magnetic CV. The near-infrared counterpart is significantly variable, and we found a period consistent with the longest X-ray period at 2.39 +/- 0.05 hr but not the shortest X-ray period. If this period is the orbital period, this would place the system in the CV period gap. The possible orbital period suggests a dM4 +/- 1 companion star. The distance is then estimated to be similar to 1 kpc. The system could be a relatively hard and X-ray luminous polar or an intermediate polar, possibly nearly synchronous.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleSpectroscopic Follow-up of X-ray Sources in the Champlane Survey: Identification of a New Cataclysmic Variable
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalThe Astrophysical Journal
dash.depositing.authorGrindlay, Jonathan E.::60a4e0fa703c94a1ad5c71189cf4844e::600
dc.date.available2019-09-25T14:12:27Z
dash.workflow.comments1Science Serial ID 99242
dc.identifier.doi10.1088/0004-637X/748/1/32
dash.source.volume748;1
dash.source.page32


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