A New Cataclysmic Variable RX J0757.0+6306: Candidate for the Shortest Period Intermediate Polar

Details A New Cataclysmic Variable RX J0757.0+6306: Candidate for the Shortest Period Intermediate Polar A New Cataclysmic Variable RX J0757.0+6306: Candidate for the Shortest Period Intermediate Polar

1998-03-19

arxiv.org/abs/astro-ph/9803234v1

Astronomy and Astrophysics

Astrophysics

8 pages (LATEX) + 7 ps-figures), l-aa style, accepted for publ. in Astron. Astrophys.; jgreiner@aip.de

Scientific paper

A new cataclysmic variable is identified as the optical counterpart of the faint and hard X-ray source RX J0757.0+6306 discovered during the ROSAT all-sky survey. Strong double-peaked emission lines bear evidence of an accretion disc via an S-wave which varies with a period of 81 +/- 5 min. We identify this period as the orbital period of the binary system. CCD photometry reveals an additional period of 8.52 +/- 0.15 min. which was stable over four nights. We suggest that RX J0757.0+6306 is possibly an intermediate polar, but we cannot exclude the possibility that it is a member of the SU UMa group of dwarf novae.

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