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2007MNRAS.381..827L - Mon. Not. R. Astron. Soc., 381, 827-834 (2007/October-3)
SDSS J150722.30+523039.8: a cataclysmic variable formed directly from a detached white dwarf/brown dwarf binary?
LITTLEFAIR S.P., DHILLON V.S., MARSH T.R., GANSICKE B.T., BARAFFE I. and WATSON C.A.
Abstract (from CDS):
The very short orbital period of SDSS J1507 is readily explained if the secondary star is nuclearly evolved, or if SDSS J1507 formed directly from a detached white dwarf/brown dwarf binary. Given the lack of any visible contribution from the secondary star, the very low secondary mass and the low Hei λ6678/Hα emission-line ratio, we argue that SDSS J1507 probably formed directly from a detached white dwarf/brown dwarf binary. If confirmed, SDSS J1507 will be the first such system identified. The implications for binary star evolution, the brown dwarf desert and the common envelope phase are discussed.
Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS
Journal keyword(s): binaries: close - binaries: eclipsing - stars: dwarf novae - stars: individual: SDSSJ1507+5230 - novae, cataclysmic variables
Simbad objects: 5
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