dc.contributor.author | Wright, N.J. | |
dc.contributor.author | Drake, J.J. | |
dc.contributor.author | Civano, F. | |
dc.date.accessioned | 2013-01-07T18:29:09Z | |
dc.date.available | 2013-01-07T18:29:09Z | |
dc.date.issued | 2010-12-10 | |
dc.identifier.citation | Wright , N J , Drake , J J & Civano , F 2010 , ' Stellar x-ray sources in the chandra cosmos survey ' , Astrophysical Journal Letters , vol. 725 , no. 1 , pp. 480-491 . https://doi.org/10.1088/0004-637X/725/1/480 | |
dc.identifier.issn | 2041-8205 | |
dc.identifier.other | PURE: 1268321 | |
dc.identifier.other | PURE UUID: 7e640a77-a93a-4511-a1e1-cafea3e9977d | |
dc.identifier.other | Scopus: 78650029982 | |
dc.identifier.uri | http://hdl.handle.net/2299/9503 | |
dc.description | Copyright 2011 Elsevier B.V., All rights reserved. | |
dc.description.abstract | We present an analysis of the X-ray properties of a sample of solar- and late-type field stars identified in the Chandra Cosmic Evolution Survey (COSMOS), a deep (160 ks) and wide (∼0.9 deg ) extragalactic survey. The sample of 60 sources was identified using both morphological and photometric star/galaxy separation methods. We determine X-ray count rates, extract spectra and light curves, and perform spectral fits to determine fluxes and plasma temperatures. Complementary optical and near-IR photometry is also presented and combined with spectroscopy for 48 of the sources to determine spectral types and distances for the sample. We find distances ranging from 30 pc to ∼12 kpc, including a number of the most distant and highly active stellar X-ray sources ever detected. This stellar sample extends the known coverage of the LX-distance plane to greater distances and higher luminosities, but we do not detect as many intrinsically faint X-ray sources compared to previous surveys. Overall the sample is typically more luminous than the active Sun, representing the high-luminosity end of the disk and halo X-ray luminosity functions. The halo population appears to include both low-activity spectrally hard sources that may be emitting through thermal bremsstrahlung, as well as a number of highly active sources in close binaries. | en |
dc.format.extent | 12 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal Letters | |
dc.title | Stellar x-ray sources in the chandra cosmos survey | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=78650029982&partnerID=8YFLogxK | |
rioxxterms.version | VoR | |
rioxxterms.versionofrecord | https://doi.org/10.1088/0004-637X/725/1/480 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |