1H 1752+08: the lowest field AM Herculis system?

Details 1H 1752+08: the lowest field AM Herculis system? 1H 1752+08: the lowest field AM Herculis system?

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.273...17f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 273, Issue 1, pp. 17-24.

Astronomy and Astrophysics

Astronomy

16

Accretion, Accretion Discs, Binaries: Eclipsing, Stars: Individual: 1H 1752+08, Stars: Magnetic Fields, Novae, Cataclysmic Variables

Scientific paper

We present spectropolarimetric observations of the eclipsing cataclysmic variable 1H 1752+08. The spectrum shows weak Balmer emission lines typical of an AM Herculis system in a low-state of accretion. Broad, Zeeman-split absorption lines are seen at H alpha and H beta. The absorption lines are circularly polarized, but we were unable to detect polarization in the continuum at the +/-1 per cent level. Detailed modelling of the line intensity and polarization spectra of 1H 1752+08 shows that the white dwarf has a magnetic field structure that deviates from that of a centred dipole. The mean photospheric field of about 7 MG is the lowest so far measured in a cataclysmic variable. We argue that 1H 1752+08 is probably a low-field AM Herculis variable, although the possibility that it is an intermediate polar cannot be completely ruled out.

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