Abstract
view Abstract Citations (16) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Circular Polarimetry of EXO 033319-2554.2: A New Eclipsing AM Herculis Star Berriman, Graham ; Smith, Paul S. Abstract This Letter presents circular polarimetry that unequivocally identifies EXO 033319-2554.2 as only the third eclipsing AM Her star and brings the total number of AM Her stars now identified to 14. The orbital period is 126.4 minutes, as previously reported, and defines a new short-period edge to the period gap seen in all classes of cataclysmic variable stars. EXO 033319-2554.2 shows 2.5 mag deep eclipses of the predominantly accreting magnetic pole on the white dwarf. Before the eclipse, the pole rotates into the line of sight and shows white-light circular polarization, due to cyclotron radiation, that reaches values as high as 10 percent. There is some evidence that the second pole is emitting cyclotron radiation too. How high time resolution photometry, linear polarimetry, and spectroscopy will be of great value in understanding this system. Publication: The Astrophysical Journal Pub Date: June 1988 DOI: 10.1086/185185 Bibcode: 1988ApJ...329L..97B Keywords: Cataclysmic Variables; Circular Polarization; Cyclotron Radiation; Eclipsing Binary Stars; Stellar Magnetic Fields; White Dwarf Stars; Polarimetry; Sky Surveys (Astronomy); Stellar Orbits; Stellar Rotation; X Ray Sources; Astrophysics; MAGNETIC FIELDS; POLARIZATION; STARS: ACCRETION; STARS: BINARIES; STARS: INDIVIDUAL ALPHANUMERIC: EXO 033319-2554.2; STARS: WHITE DWARFS full text sources ADS | data products SIMBAD (3)
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