SIMBAD references

2005MNRAS.359.1531E - Mon. Not. R. Astron. Soc., 359, 1531-1536 (2005/June-1)

HT Camelopardalis: the simplest intermediate polar spin pulse.

EVANS P.A. and HELLIER C.

Abstract (from CDS):

The intermediate polar (IP) HT Cam is unusual in that it shows no evidence for dense absorption in its spectrum. We analyse an XMM-Newton observation of this star, which confirms the absence of absorption and shows that the X-ray spin pulse is energy independent. The modulation arises solely from occultation effects and can be reproduced by a simple geometrical model in which the lower accretion footprint is fainter than the upper one.

We suggest that the lack of opacity in the accretion columns of HT Cam, and also of EX Hya and V1025 Cen, results from a low accretion rate owing to their being below the cataclysmic variable period gap.


Abstract Copyright: 2005 RAS

Journal keyword(s): accretion, accretion discs - stars: individual: HT Cam (RXJ0757.0+6306) - novae, cataclysmic variables - X-rays: binaries

Simbad objects: 9

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