Cataclysmic variables from a ROSAT/2MASS selection — I. Four new intermediate polars
Cataclysmic variables from a ROSAT/2MASS selection — I. Four new intermediate polars
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ROSAT/2MASS 选择中的灾难性变量 — I. 四个新的中间极地
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发表时间：
2005
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通讯作者：
A. Aungwerojwit
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作者：
B. Gänsicke;T. Marsh;A. Edge;P. Rodríguez;P. Rodríguez;D. Steeghs;S. Araujo;E. Harlaftis;O. Giannakis;S. Pyrzas;L. Morales;A. Aungwerojwit
We 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 active galactic nuclei. 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: 1RXS J063631.9+353537 P(orb)similar or equal to 201 min, P-spin= 1008.3408 s or 930.5829 s), 1RXS J070407.9+262501 (P(orb)similar or equal to 250 min, P-spin= 480.708 s) 1RXS J173021.5-055933 (P-orb= 925.27 min, P-spin= 128.0 s), and 1RXS J180340.0+401214 (P-orb= 160.21 min, P-spin= 1520.51 s). RX J1730, 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.
