Two more candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey

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dc.contributor.author Anderson, Scott
dc.contributor.author Becker, Andrew
dc.contributor.author Haggard, Daryl
dc.contributor.author Prieto, Jose Luis
dc.contributor.author Knapp, Gillian
dc.contributor.author Sako, Masao
dc.contributor.author Halford, Kelly
dc.contributor.author Jha, Saurabh
dc.contributor.author Martin, Blake
dc.contributor.author Holtzman, Jon
dc.contributor.author Frieman, Joshua
dc.contributor.author Garnavich, Peter
dc.contributor.author Hayward, Suzanne
dc.contributor.author Ivezic, Zeljko
dc.contributor.author Mukadam, Anjum
dc.contributor.author Sesar, Branimir
dc.contributor.author Szkody, Paula
dc.contributor.author Malanushenko, Viktor
dc.contributor.author Richmond, Michael
dc.contributor.author Schneider, Donald
dc.contributor.author York, Donald
dc.date.accessioned 2008-11-17T16:39:10Z
dc.date.available 2008-11-17T16:39:10Z
dc.date.issued 2008-06
dc.identifier.citation The Astronomical Journal 135 (2008) 2108-2113 en_US
dc.identifier.uri http://hdl.handle.net/1850/7517
dc.description RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/
dc.description.abstract AM CVn systems are a select group of ultracompact binaries with the shortest orbital periods of any known binary subclass; mass-transfer is likely from a low-mass (partially-)degenerate secondary onto a white dwarf primary, driven by gravitational radiation. In the past few years, the Sloan Digital Sky Survey (SDSS) has provided five new AM CVns. Here we report on two further candidates selected from more recent SDSS data. SDSS J1208+3550 is similar to the earlier SDSS discoveries, recognized as an AM CVn via its distinctive spectrum which is dominated by helium emission. From the expanded SDSS Data Release 6 (DR6) spectroscopic area, we provide an updated surface density estimate for such AM CVns of order 10−3 . 1 to 10−2 . 5 deg−2 for 15 < g < 20.5. In addition, we present another new candidate AM CVn, SDSS J2047+0008, that was discovered in the course of followup of SDSS-II supernova candidates. It shows nova-like outbursts in multi-epoch imaging data; in contrast to the other SDSS AM CVn discoveries, its (outburst) spectrum is dominated by helium absorption lines, reminiscent of KL Dra and 2003aw. The variability selection of SDSS J2047+0008 from the 300 deg2 of SDSS Stripe 82 presages further AM CVn discoveries in future deep, multicolor, and time-domain surveys such as LSST. The new additions bring the total SDSS yield to seven AM CVns thus far, a substantial contribution to this rare subclass, versus the dozen previously known. en_US
dc.language.iso en_US en_US
dc.publisher American Astronomical Society - The Astronomical Journal en_US
dc.relation.ispartofseries vol. 135 en_US
dc.relation.ispartofseries no. 6 en_US
dc.relation.ispartofseries pps. 2108-2113 en_US
dc.subject Binaries - close en_US
dc.subject Stars - individual (SDSS J120841.96+355025.2, SDSS J204739.40+000840.3) en_US
dc.subject white dwarfs
dc.subject cataclysmic variables
dc.subject novae
dc.title Two more candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1088/0004-6256/135/6/2108

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