IE 0830.9-2238 (Pyx2): a new intermediate polar

Details IE 0830.9-2238 (Pyx2): a new intermediate polar IE 0830.9-2238 (Pyx2): a new intermediate polar

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.278.1075o&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 278, Issue 4, pp. 1075-1081.

Astronomy and Astrophysics

Astronomy

12

Stars: Individual: 1E 0830.9-2238 (Pyx2), Novae, Cataclysmic Variables, X-Rays: Stars

Scientific paper

The X-ray source 1E 0830.9-2238 was optically identified as a cataclysmic variable by Hertz et al. High-speed CCD photometry of the optical counterpart shows a stable 26-min period. Although present in every light curve, the amplitude of the 26-min period is variable, but not, apparently, in a cyclic or systematic way. The first harmonic of the 26-min period is a persistent feature in the light curve. Tentative evidence for an orbital period in the range 6-9h is found, but this needs confirmation. Along with other evidence, the 26-min period strongly suggests that the star is an intermediate polar-type cataclysmic variable. The mean amplitude is amongst the largest seen in the intermediate polars. No evidence for another nearby period, separated in frequency by the orbital frequency, is found.

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