J/ApJ/892/L35ivo://CDS.VizieR/J/ApJ/892/L35doi:10.26093/cds/vizier.18929035CDSBrown W.R.Kilic M.Bedard A.Kosakowski A.Bergeron P.2022-09-13T11:37:04Z2021-09-16T12:23:22ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frspectroscopic-binary-starswhite-dwarf-starsradial-velocityvisible-astronomyWe report the discovery of a 1201s orbital period binary, the third shortest-period detached binary known. Sloan Digital Sky Survey J232230.20+050942.06 contains two He-core white dwarfs orbiting with a 27{deg} inclination. Located 0.76kpc from the Sun, the binary has an estimated Laser Interferometer Space Antenna (LISA) 4yr signal-to-noise ratio of 40. J2322+0509 is the first He+He white dwarf LISA verification binary, a source class that is predicted to account for one-third of resolved LISA ultra-compact binary detections.2020ApJ...892L..35Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/892/L35CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJ/743/138 : Spectroscopic survey of bright white dwarfs (Gianninas+, 2011)J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)J/A+A/557/A19 : Mass and age of extreme low-mass white dwarfs (Althaus+, 2013)J/ApJ/812/167 : The ELM survey. VI. 11 new ELM WD binaries (Gianninas+, 2015)J/A+A/595/A35 : Low-mass helium WDs evolutionary models (Istrate+, 2016)J/ApJ/848/11 : Spectroscopic and photometric analysis of WDs (Bedard+, 2017)J/ApJ/889/49 : The ELM Survey. VIII. Final double WD binaries (Brown+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/892/L35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/892/L35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/892/L35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/892/L35https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/892/L35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/892/L35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/892/L35/fig1Radial velocities phased to the best-fit orbital solutionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date (TDB) at mid-exposure, BJD-2458000dtime.epochdoubleRV[-222/209] Barycentric radial velocitykm/sphys.veloc;pos.barycenterfloate_RV[12.9/56.3] Uncertainty in RVkm/sstat.errorfloatExp[150/480] Exposure timestime.duration;obs.exposureint