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

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dc.contributor.author Torres, Manuel Angel Perez
dc.contributor.author Casares, J.
dc.contributor.author Martínez-Pais, I. G.
dc.contributor.author Charles, P. A.
dc.date.accessioned 2017-11-07T09:38:59Z
dc.date.available 2017-11-07T09:38:59Z
dc.date.issued 2002
dc.identifier.citation Torres, 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.x en
dc.identifier.volume 334
dc.identifier.issued 1
dc.identifier.startpage 233
dc.identifier.endpage 240
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/10468/4991
dc.identifier.doi 10.1046/j.1365-8711.2002.05521.x
dc.description.abstract We 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Oxford University Press en
dc.relation.uri https://academic.oup.com/mnras/article-lookup/doi/10.1046/j.1365-8711.2002.05521.x
dc.rights © 2002, Royal Astronomical Society en
dc.subject Accretion en
dc.subject Accretion discs en
dc.subject Binaries en
dc.subject Close en
dc.subject Stars en
dc.subject Individual en
dc.subject Centaurus X-4 en
dc.subject Novae en
dc.subject Cataclysmic variables en
dc.subject X-rays en
dc.subject Stars en
dc.title Rotational broadening and Doppler tomography of the quiescent X-ray nova Centaurus X-4 en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Manuel Angel Perez Torres, Physics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: mapt@phys.ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Monthly Notices of the Royal Astronomical Society en
dc.internal.IRISemailaddress mapt@phys.ucc.ie en


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