RX J0744−52: a probable new intermediate polar |
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| Authors: | Gavin Ramsay David A H Buckley & Mark Cropper |
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| Institution: | Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT,;South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa |
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| Abstract: | We present optical and X-ray data of the cataclysmic variable RX 0744?52 discovered using ROSAT by Motch et al. High-resolution spectroscopy centred on the Hα line indicates a probable orbital period of 3.60 h. From its distance (obtained using polarimetry), its X-ray luminosity, its X-ray colour and its X-ray/UV+optical ratio, we suggest that RX 0744?52 is a new intermediate polar. The absence of a significant coherent modulation in the X-ray light curve suggests either that RX 0744?52 has a low inclination or that the rotational and magnetic axes must be closely aligned. This is consistent with its small radial velocity amplitude. |
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| Keywords: | accretion accretion discs stars: individual: RX J0744?52 novae cataclysmic variables white dwarfs X-rays: stars |
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