Doppler tomography of the X-ray transient J0422+32 during the 1993 December mini-outburst
Open Access
- 15 May 1995
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 274 (2) , 565-571
- https://doi.org/10.1093/mnras/274.2.565
Abstract
Intermediate-resolution optical spectra of the X-ray transient J0422+32, obtained during the 1993 December mini-outburst, show a strong modulation in radial velocities and equivalent widths of all the emission lines, with a period of 0.2127±0.0013d (5.1h). This modulation is in good agreement with the photometric period of 0.2121d reported during both this and the original outburst. In particular, the complex He II λ4686 emission profile displays an intense S-wave with a velocity semi-amplitude of ∼ 755 km s−1. We discuss the implications of this emission originating either in the hotspot or on the heated face of the companion star. In the first case a mass function |$f(M)\sim1.2\enspace \text M_\odot$| is implied, whereas in the latter case |$f(M)\sim9.5\enspace \text M_\odot$|.Keywords
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