2005MNRAS.359.1531E

Query : 2005MNRAS.359.1531E

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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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* XY Ari CV* 02 56 08.19048 +19 26 34.1844           ~ 167 1
2 V* V405 Aur CV* 05 57 59.2934496792 +53 53 44.926489464           ~ 140 0
3 V* PQ Gem CV* 07 51 17.3280306912 +14 44 23.874868716   14.415 14.162 13.945   ~ 237 0
4 V* HT Cam CV* 07 57 01.3362559272 +63 06 02.000945340   16.36       ~ 78 0
5 V* V1025 Cen CV* 12 38 16.3191432264 -38 42 45.836441856   15.20       ~ 90 0
6 V* EX Hya CV* 12 52 24.2222471899 -29 14 55.999766523   13.505 13.491 13.549   M5-6V 730 0
7 V* V1223 Sgr CV* 18 55 02.3108012664 -31 09 49.584656268           ~ 347 0
8 V* FO Aqr CV* 22 17 55.3796835600 -08 21 03.754995948   13.533 13.445 13.414   ~ 378 0
9 V* AO Psc CV* 22 55 17.9860863984 -03 10 39.981831564           ~ 327 0

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