J/ApJ/836/124ivo://CDS.VizieR/J/ApJ/836/124doi:10.26093/cds/vizier.18360124CDSDittmann J.A.Irwin J.M.Charbonneau D.Berta-Thompson Z.K.,Newton E.R.Latham D.W.Latham C.A.Esquerdo G.Berlind P.,Calkins M.L.2017-10-31T11:30:58Z2017-10-23T10:44:11ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomyphotometryradial-velocityWe report the detection of stellar eclipses in the LP 661-13 system. We present the discovery and characterization of this system, including high-resolution spectroscopic radial velocities and a photometric solution spanning two observing seasons. LP 661-13 is a low-mass binary system with an orbital period of 4.7043512_-0.0000010_^+0.0000013^d at a distance of 24.9+/-1.3pc. LP661-13A is a 0.30795+/-0.00084M_{sun}_ star, while LP661-13B is a 0.19400+/-0.00034M_{sun}_ star. The radius of each component is 0.3226+/-0.0033R_{sun}_ and 0.2174+/-0.0023R_{sun}_, respectively. We detect out-of-eclipse modulations at a period slightly shorter than the orbital period, implying that at least one of the components is not rotating synchronously. We find that each component is slightly inflated compared to stellar models, and that this cannot be reconciled through age or metallicity effects. As a nearby eclipsing binary system, where both components are near or below the full-convection limit, LP 661-13 will be a valuable test of models for the structure of cool dwarf stars.2017ApJ...836..124Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/836/124CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/327/1039 : Structure and evolution of low-mass stars (Chabrier+ 1997)J/A+A/337/403 : Low-mass stars evolutionary models (Baraffe+ 1998)J/ApJS/141/503 : Radial Velocities for 889 late-type stars (Nidever+, 2002)J/A+A/398/239 : RI differential photometry of CU Cnc (Ribas, 2003)J/ApJ/582/1011 : Revised NLTT Catalog (Salim+, 2003)J/AJ/128/463 : A preliminary 20pc census from the NLTT catalog (Reid+, 2004)J/ApJ/684/635 : New low-mass eclipsing binary from SDSS-II (Blake+, 2008)J/ApJ/691/1400 : Absolute properties of CM Dra (Morales+, 2009)J/ApJ/720/1118 : i-band photometry of HAT-P-16 (Buchhave+, 2010)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/AJ/141/166 : HATNet variability survey of K and M dwarfs (Hartman+, 2011)J/ApJ/742/123 : Photometry and Velocity of LSPM J1112+7626 (Irwin+, 2011)J/ApJ/728/48 : Multicolor eclipse data for 6 new binaries (Kraus+, 2011)J/MNRAS/431/3240 : Ji photometry of WTS 19g-4-02069 (Nefs+, 2013)J/ApJ/768/127 : Q1-11 Kepler light curve of KIC 4862625 (Schwamb+, 2013)J/A+A/557/A119 : Eclipsing binary system LL Aquarii (Southworth, 2013)J/ApJ/784/156 : Parallaxes for nearby mid-to-late M dwarfs (Dittmann+, 2014)J/A+A/572/A50 : J0113+31 light + velocity curves (Gomez Maqueo Chew+, 2014)J/ApJS/220/16 : SpeX NIR survey of 886 nearby M dwarfs (Terrien+, 2015)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/ApJ/818/153 : MEarth photometry: nearby M-dwarf magnitudes (Dittmann+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/836/124https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/836/124http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/836/124https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/836/124https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/836/124http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/836/124GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfraredOpticaldefaultJ/ApJ/836/124/table1TRES radial velocities for LP 661-13 (Barycentric)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleRV1[-39/39] Radial velocity of primary componentkm/sspect.dopplerVelocfloatRV2[-61.1/61.8] Radial velocity of secondary componentkm/sspect.dopplerVelocfloatJ/ApJ/836/124/table2MEarth photometry for LP 661-13recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleDelmag[-0.2/0.09] Differential magnitude in MEarth bandpass (1)magphot.mag;arith.difffloate_Delmag[0.001/0.08] Uncertainty in Delmagmagstat.error;phot.magfloatTelObserving telescopeinstr.telchar