The nature of the rapid variability of CI Cam (XTE J0421+ 560)

Details The nature of the rapid variability of CI Cam (XTE J0421+ 560) The nature of the rapid variability of CI Cam (XTE J0421+ 560)

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008atel.1381....1b&link_type=abstract

The Astronomer's Telegram, #1381

Astronomy and Astrophysics

Astronomy

1

Radio, Optical, X-Ray, Binaries, Black Holes, Cataclysmic Variables, Transients, Variables, Stars

Scientific paper

CI Cam is an X-ray transient and a multiple system which consists of a B4 III-V star displaying B[e] phenomenon, a compact object, probably a white dwarf on an eccentric orbit with the period of 19.407 day (ATEL #416), and a third massive companion of the unknown nature which causes the slow shift of the wind lines of B[e] star (ATEL #1036). As reported elsewhere, CI Cam showed different types of optical variability: large optical outburst accompanied the X-ray event in 1998 April, long-term changes in the scales of a few years, variation with a period of 372 +/-15 day (ATel #820), 19.4 day orbital periodic changes, mini-outbursts and dips, and irregular intranight microvariability.

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