Rotational broadening and Doppler tomography of the quiescent X-ray nova Centaurus X-4

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dc.contributor.authorTorres, Manuel Angel Perez
dc.contributor.authorCasares, J.
dc.contributor.authorMartínez-Pais, I. G.
dc.contributor.authorCharles, P. A.
dc.date.accessioned2017-11-07T09:38:59Z
dc.date.available2017-11-07T09:38:59Z
dc.date.issued2002
dc.description.abstractWe present high- and intermediate-resolution spectroscopy of the X-ray nova Centaurus X-4 during its quiescent phase. Our analysis of the absorption features supports a K3-K5 V spectral classification for the companion star, which contributes similar or equal to75 per cent of the total flux at Halpha . Using the high-resolution spectra we have measured the rotational broadening of the secondary star to be v sin i =43+/-6 km s(-1) and determined a binary mass ratio of q =0.17+/-0.06. Combining our results for K (2) and q with the published limits for the binary inclination, we constrain the mass of the compact object and the secondary star to the ranges 0.49<M (1) <2.49 M(.) and 0.04<M (2) <0.58 M(.). A Doppler image of the Halpha line shows emission coming from the secondary star, but no hotspot is present. We discuss the possible origins of this emission.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationTorres, M. A. P., Casares, J., Martínez-Pais, I. G. and Charles, P. A. (2002) 'Rotational broadening and Doppler tomography of the quiescent X-ray nova Centaurus X-4', Monthly Notices of the Royal Astronomical Society, 334(1), pp. 233-240. doi: 10.1046/j.1365-8711.2002.05521.xen
dc.identifier.doi10.1046/j.1365-8711.2002.05521.x
dc.identifier.endpage240
dc.identifier.issn0035-8711
dc.identifier.issued1
dc.identifier.journaltitleMonthly Notices of the Royal Astronomical Societyen
dc.identifier.startpage233
dc.identifier.urihttps://hdl.handle.net/10468/4991
dc.identifier.volume334
dc.language.isoenen
dc.publisherOxford University Pressen
dc.relation.urihttps://academic.oup.com/mnras/article-lookup/doi/10.1046/j.1365-8711.2002.05521.x
dc.rights© 2002, Royal Astronomical Societyen
dc.subjectAccretionen
dc.subjectAccretion discsen
dc.subjectBinariesen
dc.subjectCloseen
dc.subjectStarsen
dc.subjectIndividualen
dc.subjectCentaurus X-4en
dc.subjectNovaeen
dc.subjectCataclysmic variablesen
dc.subjectX-raysen
dc.subjectStarsen
dc.titleRotational broadening and Doppler tomography of the quiescent X-ray nova Centaurus X-4en
dc.typeArticle (peer-reviewed)en
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