X-ray and optical observations of a new ROSAT discovered polar: RX J0453.4-4213.

Details X-ray and optical observations of a new ROSAT discovered polar: RX J0453.4-4213. X-ray and optical observations of a new ROSAT discovered polar: RX J0453.4-4213.

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...305..507b&link_type=abstract

Astronomy and Astrophysics, v.305, p.507

Astronomy and Astrophysics

Astrophysics

13

Accretion, Accretion Disks, Stars: Individual (Rxj0453.4-4213), Stars: Novae, Cataclysmic Variables, Stars: Magnetic Fields, X-Rays: Stars, Radiation Mechanisms: Miscellaneous

Scientific paper

We report the discovery of a new AM Herculis system (polar), identified as the optical V~19mag counterpart of the bright, soft, high-galactic latitude X-ray source RXJ0453.4-4213 detected during the ROSAT All-Sky Survey and present the results of our optical and X-ray follow-up observations. From the radial velocity variations of the Balmer and HeII emission lines we derive two candidate orbital periods: 101.95(20)min and 93.83(22)min. Cyclotron harmonics are visible almost around the whole orbit. The analysis of the phase dependent movement of their maxima leads to a magnetic field strength in the accretion region of B=36MG, and an angle ~85deg for the sum of the orbital inclination i and the co-latitude of the accretion region β. The absence of M star features in the spectra provides a lower limit for the distance to the system of d>440pc.

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