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

Bibcode
2002MNRAS.334..233T
DOI
10.1046/j.1365-8711.2002.05521.x
Torres, M. A. P.; Casares, J.; Martínez-País, I. G.; Charles, P. A.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society, Volume 334, Issue 1, pp. 233-240.

Advertised on:
7
2002
Journal
Monthly Notices of the Royal Astronomical Society
Number of authors
4
IAC number of authors
3
Citations
44
Refereed citations
43
Description
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 ~=75 per cent of the total flux at Hα. Using the high-resolution spectra we have measured the rotational broadening of the secondary star to be vsini=43+/-6kms-1 and determined a binary mass ratio of q=0.17+/-0.06. Combining our results for K2 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
Type
Refereed
Accretion
Novae

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