J/ApJ/743/141ivo://CDS.VizieR/J/ApJ/743/141doi:10.26093/cds/vizier.17430141CDSCarson J.C.Marengo M.Patten B.M.Luhman K.L.Sonnett S.M.Hora J.L.,Schuster M.T.Allen P.R.Fazio G.G.Stauffer J.R.Schnupp C.2017-10-11T05:13:21Z2013-06-18T10:28:11ZCDS support team

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

cds-question@unistra.frstellar-distancelate-type-starsmultiple-starsstellar-spectral-typesinfrared-sourcesWe report observational techniques, results, and Monte Carlo population analyses from a Spitzer Infrared Array Camera imaging survey for substellar companions to 117 nearby M, L, and T dwarf systems (median distance of 10pc, mass range of 0.6 to ~0.05M_{sun}_). The two-epoch survey achieves typical detection sensitivities to substellar companions of [4.5um]<=17.2mag for angular separations between about 7" and 165". Based on common proper motion analysis, we find no evidence for new substellar companions. Using Monte Carlo orbital simulations (assuming random inclination, random eccentricity, and random longitude of pericenter), we conclude that the observational sensitivities translate to an ability to detect 600-1100K brown dwarf companions at semimajor axes >~35AU and to detect 500-600 K companions at semimajor axes >~60AU. The simulations also estimate a 600-1100K T dwarf companion fraction of <3.4% for 35-1200AU separations and <12.4% for the 500-600K companions for 60-1000AU separations.2011ApJ...743..141Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/743/141CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2013)I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)J/ApJ/710/1627 : Mid-IR photometry of cold brown dwarfs (Leggett+, 2010)J/AJ/137/1 : Proper motions of late-type dwarfs (Faherty+, 2009)J/ApJ/651/502 : Spitzer IRAC photometry of M, L, and T dwarfs (Patten+, 2006)J/AJ/125/3302 : HST binary very low mass stars and brown dwarfs (Gizis+, 2003)J/AJ/126/1526 : IR photometry of ultracool dwarfs (Bouy+, 2003)J/MNRAS/328/45 : Late-type stars members of young groups (Montes+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/743/141https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/743/141http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/743/141https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/743/141https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/743/141http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/743/141GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/743/141/table1 (Sample of late M, L, and T dwarf systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/743/141/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/743/141/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/743/141/table1?GETtext/xml+votable180.050000true319.31362-38.867360.0055555555555555566/250 546 672 2737 3965 4262 4316 4444 4719 4775 4790 4948 5000 5420 5534 6783 7033 7220 7291 7369 8402 8478 8625 8794 9146 9479 9569 11292 11636 11940 13425 13688 14266 14772 14858 15311 16391 16758 17166 17348 17814 18060 18300 18450 18496 18683 19647 19857 20896 21296 21861 22148 22309 22521 22681 22759 22861 23910 24590 24694 25314 25853 26020 26210 26248 26699 26861 26972 27074 27462 27618 27731 27762 28006 28344 28612 28955 30061 30505 30749 30771 30833 30883 31268 31319 31781 32337 32426 33767 34181 34448 34535 34626 35451 35471 35499 36072 36526 36821 37332 38322 40882 40941 41591 42290 42739 43966 44118 44226 44286 44807 45564 46566 46632 46776 48957https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/743/141?format=asciiOpticalInfrareddefaultJ/ApJ/743/141/table1Sample of late M, L, and T dwarf systemsSimbadNameSimbad column added by the CDSmeta.idcharSpTMK spectral typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharPID1Spitzer first-epoch observing program (33 or 35)meta.id;obsintPID2? Spitzer second-epoch follow-up observing program IDmeta.id;obsintnullablel_SpT[<~] Limit flag on SpTmeta.code.errorcharn_SpT[df] Origin of SpT (1)meta.notecharr_SpTSpectral type reference(s) (2)meta.ref;pos.framecharDist[1.3/43.8] Distance (3)pcpos.distance;pos.heliocentricfloatf_Dist[ce] Flag on Dist (1)meta.codecharNotesMultiplicity notes (all multiple systems are unresolved unless otherwise noted)meta.notecharr_NotesMultiplicity reference(s) (2)meta.ref;pos.framecharP06Cross-match with Spitzer photometry form Patten+, 2006, Cat. J/ApJ/651/502, within 5"meta.ref.urlintnullable2MDisplay the 2MASS data within 1" (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RAPositions from SIMBAD database (right ascension part)degpos.eq.ra;meta.main_DEPositions from SIMBAD database (declination part)degpos.eq.dec;meta.main