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Ultracompact AM CVn Binaries from the Sloan Digital Sky Survey: three candidates plus the first confirmed Eclipsing System

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dc.contributor.author Anderson, Scott
dc.contributor.author Haggard, Daryl
dc.contributor.author Homer, Lee
dc.contributor.author Joshi, Nikhil
dc.contributor.author Margon, Bruce
dc.contributor.author Silvestri, Nicole
dc.contributor.author Szkody, Paula
dc.contributor.author Wolfe, Michael
dc.contributor.author Agol, Eric
dc.contributor.author Becker, Andrew
dc.contributor.author Henden, Arne
dc.contributor.author Hall, Patrick
dc.contributor.author Knapp, Gillian
dc.contributor.author Richmond, Michael
dc.contributor.author Schneider, Donald
dc.contributor.author Stinson, Gregory
dc.contributor.author Barentine, John
dc.contributor.author Brewington, Howard
dc.contributor.author Brinkmann, Jonanthan
dc.contributor.author Harvanek, Michael
dc.contributor.author Kleinman, Scott
dc.contributor.author Krzesinski, Jurek
dc.contributor.author Long, Dan
dc.contributor.author Neilsen, Eric
dc.contributor.author Nitta, Atsuko
dc.contributor.author Snedden, Stephanie
dc.date.accessioned 2008-11-17T20:54:07Z
dc.date.available 2008-11-17T20:54:07Z
dc.date.issued 2005-11
dc.identifier.citation The Astronomical Journal 130 (2008) 2230-2236 en_US
dc.identifier.uri http://hdl.handle.net/1850/7541
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 rare (about a dozen previously known) class of cataclysmic variables, arguably encompassing the shortest orbital periods (down to about 10 minutes) of any known binaries. Both binary components are thought to be degenerate (or partially so), likely with mass-transfer from a helium-rich donor onto a white dwarf, driven by gravitational radiation. Although rare, AM CVn systems are of high interest as possible SN Ia progenitors, and because they are predicted to be common sources of gravity waves in upcoming experiments such as LISA. We have identified four new AM CVn candidates from the Sloan Digital Sky Survey (SDSS) spectral database. All four show hallmark spectroscopic characteristics of the AM CVn class: each is devoid of hydrogen features, and instead shows a spectrum dominated by helium. All four show double-peaked emission, indicative of helium-dominated accretion disks. Limited time-series CCD photometric follow-on data have been obtained for three of the new candidates from the ARC 3.5m; most notably, a 28.3 minute binary period with sharp, deep eclipses is discovered in one case, SDSS J0926+3624. This is the first confirmed eclipsing AM CVn, and our data allow initial estimates of binary parameters for this ultracompact system. The four new SDSS objects also provide a substantial expansion of the currently critically-small sample of AM CVn systems. en_US
dc.language.iso en_US en_US
dc.publisher American Astronomical Society - The Astronomical Journal en_US
dc.relation.ispartofseries vol. 130 en_US
dc.relation.ispartofseries no. 5 en_US
dc.relation.ispartofseries pss. 2230-2236 en_US
dc.subject Binaries - close en_US
dc.subject Binaries - eclipsing en_US
dc.subject novae, catraclysmic variables en_US
dc.subject White dwarfs en_US
dc.subject Starts - individual (SDSS J092638.71+362402.4) en_US
dc.title Ultracompact AM CVn Binaries from the Sloan Digital Sky Survey: three candidates plus the first confirmed Eclipsing System en_US
dc.type Article en_US
dc.identifier.url http://dx.doi.org/10.1086/491587

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