Infrared spectroscopy of the long-period polar RX J0515.6+0105

Details Infrared spectroscopy of the long-period polar RX J0515.6+0105 Infrared spectroscopy of the long-period polar RX J0515.6+0105

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.288.1033h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 288, Issue 4, pp. 1033-1040.

Astronomy and Astrophysics

Astronomy

15

Stars: Individual: Rx J0515.6+0105, Stars: Magnetic Fields, Novae, Cataclysmic Variables, White Dwarfs, Infrared: Stars.

Scientific paper

We present K-band (1.81-2.44 μm) spectroscopy of the 7.98-h orbital period polar RX J0515.6+0105. Spectra obtained around orbital phase 0.5 reveal strong emission lines of neutral hydrogen and helium from the accretion stream. No obvious spectral features from the secondary star are detected: the K-band emission is dominated instead by cyclotron radiation from the accretion region. We find that the slope of the cyclotron spectrum is consistent with a magnetic field strength of 60 MG, in agreement with previous optical studies and with the results from our modelling of previous white-light polarimetry. We estimate that the secondary contributes less than ~20 per cent of the infrared flux, implying a distance greater than ~1500 pc. With this result, we estimate the mass transfer rate to be greater than ~1.0x10^17 g s^-1. We show that it is plausible that the system is synchronized with the derived values of the mass transfer rate and with a primary magnetic field strength of 60 MG.

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