Evidence for an Accretion Stream in the Low Accretion Rate Polar (LARP) J2048

Details Evidence for an Accretion Stream in the Low Accretion Rate Polar (LARP) J2048 Evidence for an Accretion Stream in the Low Accretion Rate Polar (LARP) J2048

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541619h&link_type=abstract

American Astronomical Society, AAS Meeting #215, #416.19; Bulletin of the American Astronomical Society, Vol. 42, p.269

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present new red/near-IR spectra of the LARP J204827.9+005008.9 obtained with the (UT2) telescope. All emission lines in our spectra have two components. The sinusoidal low amplitude component corresponds to irradiation at the inner hemisphere of the M3 star. Our Doppler maps indicate that the larger amplitude component may correspond to a ballistic stream from L1. J2048 is thought to be accreting via a wind, so the detection of velocity features consistent with the velocities of Roche lobe overflow is unexpected. We briefly discuss scenarios that might explain this situation, but none are fully satisfactory.

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