J/ApJ/742/123ivo://CDS.VizieR/J/ApJ/742/123doi:10.26093/cds/vizier.17420123CDSIrwin J.M.Quinn S.N.Berta Z.K.Latham D.W.Torres G.Burke C.J.,Charbonneau D.Dittmann J.Esquerdo G.A.Stefanik R.P.Oksanen A.,Buchhave L.A.Nutzman P.Berlind P.Calkins M.L.Falco E.E.2017-06-27T06:37:38Z2013-05-27T12:54:07ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryradial-velocityWe report the detection of eclipses in LSPM J1112+7626, which we find to be a moderately bright (I_C_=12.14+/-0.05) very low mass binary system with an orbital period of 41.03236+/-0.00002 days, and component masses M_1_=0.395+/-0.002M_{sun}_ and M_2_=0.275+/-0.001M_{sun}_ in an eccentric (e=0.239+/-0.002) orbit. A 65 day out-of-eclipse modulation of approximately 2% peak-to-peak amplitude is seen in I-band, which is probably due to rotational modulation of photospheric spots on one of the binary components. This paper presents the discovery and characterization of the object, including radial velocities sufficient to determine both component masses to better than 1% precision, and a photometric solution. We find that the sum of the component radii, which is much better determined than the individual radii, is inflated by 3.8^+0.9^_-0.5_% compared to the theoretical model predictions, depending on the age and metallicity assumed. These results demonstrate that the difficulties in reproducing observed M-dwarf eclipsing binary radii with theoretical models are not confined to systems with very short orbital periods. This object promises to be a fruitful testing ground for the hypothesized link between inflated radii in M-dwarfs and activity.2011ApJ...742..123Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/742/123CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2013)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)I/298 : LSPM-North Catalog (Lepine+ 2005)III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)J/ApJ/736/12 : Transit light curves of GJ1214 (Berta+, 2011)J/AJ/141/78 : Low-mass eclipsing binaries in KIC (Coughlin+, 2011)J/AJ/141/166 : HATNet variability survey of K and M dwarfs (Hartman+, 2011)J/ApJ/728/48 : Multicolor eclipse data for 6 new binaries (Kraus+, 2011)J/AJ/142/160 : Kepler Mission. II. 2165 eclipsing binaries (Slawson+, 2011)J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)J/ApJ/684/635 : New low-mass eclipsing binary from SDSS-II (Blake+, 2008)J/MNRAS/389/585 : Fundamental parameters of M dwarfs (Casagrande+, 2008)J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+, 2005)J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)J/A+A/327/1039 : Structure and evolution of low-mass stars (Chabrier+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/742/123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/742/123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/742/123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/742/123https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/742/123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/742/123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/742/123/table1Light curve datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSetData-set identifier (1)meta.idcharOrb? Orbit number; from zero at T_0_ (2)meta.number;time.periodintnullableHJDHeliocentric Julian Date of mid-exposure (UTC)dtime.epochdoublemagDifferential magnitudemagphot.mag;arith.difffloate_magError in magmagstat.error;phot.magfloatdmagFrame zero point offset {Delta}magmagphot.mag;arith.difffloatFWHMFWHM of stellar images (3)pixphys.angSizefloatAirMAirmassobs.airMassfloatFlagField angle divided by 180 degrees (4)meta.code.errorintxX pixel coordinate of starpixpos.cartesian.xdoubleyY pixel coordinate of starpixpos.cartesian.ydoubleCMCommon-mode differential magnitude (5)magphot.mag;arith.difffloatJ/ApJ/742/123/table4Radial velocity datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Date of mid-exposure (UTC)dtime.epochdoublePhaseNormalized orbital phasetime.phasedoubleRV1Barycentric radial velocity of star 1km/sspect.dopplerVelocfloatRV2Barycentric radial velocity of star 2km/sspect.dopplerVelocfloatCpkPeak normalized cross-correlation from todcor (1)stat.correlationfloat