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28 March 2024
 
  » arxiv » astro-ph/0504460

 Article overview


Cataclysmic variables from a ROSAT/2MASS selection I: Four new intermediate polars
B.T. Gaensicke ; T.R. Marsh ; A. Edge ; P. Rodriguez-Gil ; D. Steeghs ; S. Araujo-Betancor ; E. Harlaftis ; O. Giannakis ; S. Pyrzas ; L. Morales-Rueda ; A. Aungwerojwit ;
Date 21 Apr 2005
Journal Mon.Not.Roy.Astron.Soc. 361 (2005) 141-154
Subject astro-ph
AbstractWe report the first results from a new search for cataclysmic variables (CVs) using a combined X-ray (ROSAT) / infrared (2MASS) target selection that discriminates against background AGN. Identification spectra were obtained at the Isaac Newton Telescope for a total of 174 targets, leading to the discovery of 12 new CVs. Initially devised to find short-period low-mass-transfer CVs, this selection scheme has been very successful in identifying new intermediate polars. Photometric and spectroscopic follow-up observations identify four of the new CVs as intermediate polars: 1RXSJ063631.9+353537 (Porb~201min, Pspin=1008.3408s or 930.5829), 1RXSJ070407.9+262501 (Porb~250min, Pspin=480.708s), 1RXSJ173021.5-055933 (Porb=925.27min, Pspin=128.0s), and 1RXSJ180340.0+401214 (Porb=160.21min, Pspin=1520.51s). RXJ1730, also a moderately bright hard X-ray source in the INTEGRAL/IBIS Galactic plane survey, resembles the enigmatic AE Aqr. It is likely that its white dwarf is not rotating at the spin equilibrium period, and the system may represent a short-lived phase in CV evolution.
Source arXiv, astro-ph/0504460
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