Show simple item record

dc.contributor.authorAnderson, Scott
dc.contributor.authorBecker, Andrew
dc.contributor.authorHaggard, Daryl
dc.contributor.authorPrieto, Jose Luis
dc.contributor.authorKnapp, Gillian
dc.contributor.authorSako, Masao
dc.contributor.authorHalford, Kelly
dc.contributor.authorJha, Saurabh
dc.contributor.authorMartin, Blake
dc.contributor.authorHoltzman, Jon
dc.contributor.authorFrieman, Joshua
dc.contributor.authorGarnavich, Peter
dc.contributor.authorHayward, Suzanne
dc.contributor.authorIvezic, Zeljko
dc.contributor.authorMukadam, Anjum
dc.contributor.authorSesar, Branimir
dc.contributor.authorSzkody, Paula
dc.contributor.authorMalanushenko, Viktor
dc.contributor.authorRichmond, Michael
dc.contributor.authorSchneider, Donald
dc.contributor.authorYork, Donald
dc.identifier.citationThe Astronomical Journal 135 (2008) 2108-2113en_US
dc.descriptionRIT community members may access full-text via RIT Libraries licensed databases:
dc.description.abstractAM 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.publisherAmerican Astronomical Society - The Astronomical Journalen_US
dc.relation.ispartofseriesvol. 135en_US
dc.relation.ispartofseriesno. 6en_US
dc.relation.ispartofseriespps. 2108-2113en_US
dc.subjectBinaries - closeen_US
dc.subjectStars - individual (SDSS J120841.96+355025.2, SDSS J204739.40+000840.3)en_US
dc.subjectwhite dwarfs
dc.subjectcataclysmic variables
dc.titleTwo more candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Surveyen_US

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record