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2013MNRAS.429.2143C - Mon. Not. R. Astron. Soc., 429, 2143-2160 (2013/March-1)
A search for the hidden population of AM CVn binaries in the Sloan digital sky survey.
CARTER P.J., MARSH T.R., STEEGHS D., GROOT P.J., NELEMANS G., LEVITAN D., RAU A., COPPERWHEAT C.M., KUPFER T. and ROELOFS G.H.A.
Abstract (from CDS):
We present two new candidate AM CVn binaries discovered using this strategy: SDSS J104325.08+563258.1 and SDSS J173047.59+554518.5. We also present spectra of 29 new cataclysmic variables, 23 DQ white dwarfs and 21 DZ white dwarfs discovered in this survey.
The survey is now approximately 70percent complete, and the discovery of seven new AM CVn binaries indicates a lower space density than previously predicted. From the essentially complete g ≤ 19 sample, we derive an observed space density of (5±3)x10-7/pc3; this is lower than previous estimates by a factor of 3.
The sample has been cross-matched with the GALEX All-Sky Imaging Survey data base, and with Data Release 9 of the United Kingdom Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS). The addition of UV photometry allows new colour cuts to be applied, reducing the size of our sample to ∼ 1100 objects. Optimizing our follow-up should allow us to uncover the remaining AM CVn binaries present in the SDSS, providing the larger homogeneous sample required to more reliably estimate their space density.
Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)
Journal keyword(s): accretion, accretion discs - binaries: close - novae, cataclysmic variables - stars: individual: SDSS J104325.08+563258.1 - stars: individual: SDSS J173047.59+554518.5 - white dwarfs
VizieR on-line data: <Available at CDS (J/MNRAS/429/2143): tablea1.dat spf/* sps/*>
Simbad objects: 1968