SIMBAD references

2008ApJ...674..421F - Astrophys. J., 674, 421-430 (2008/February-2)

A near-infrared spectroscopic study of the accreting magnetic white dwarf SDSS J121209.31+013627.7 and its substellar companion.


Abstract (from CDS):

The nature of the excess near-infrared emission associated with the magnetic white dwarf commonly known as SDSS 1212 is investigated primarily through spectroscopy, and also via photometry. The inferred low-mass secondary in this system has been previously detected by the emission and variation of Hα, and the 1-2.5 µm spectral data presented here are consistent with the presence of a late L or early T dwarf. The excess flux seen beyond 1.5 µm in the phase-averaged spectrum is adequately modeled with an L8 dwarf substellar companion and cyclotron emission in a 7 MG magnetic field. This interesting system manifests several observational properties typical of polars, and is most likely an old interacting binary with a magnetic white dwarf and a substellar donor in an extended low state.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - Infrared: Stars - Stars: Novae, Cataclysmic Variables - Stars: Evolution - Stars: Formation - Stars: Fundamental Parameters - stars: individual (SDSS J121209.31+013627.7) - Stars: Low-Mass, Brown Dwarfs - Stars: White Dwarfs

Simbad objects: 22

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