J/ApJ/867/109ivo://CDS.VizieR/J/ApJ/867/109doi:10.26093/cds/vizier.18670109CDSMartin E.C.Kirkpatrick J.D.Beichman C.A.Smart R.L.Faherty J.K.,Gelino C.R.Cushing M.C.Schneider A.C.Wright E.L.Lowrance P.,Ingalls J.Tinney C.G.McLean I.S.Logsdon S.E.Lebreton J.2021-09-08T06:46:07Z2019-10-16T13:32:44ZCDS support team

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

cds-question@unistra.frvisible-astronomytrigonometric-parallaxbrown-dwarfsy-dwarfsabsolute-magnitudeinfrared-photometrystellar-spectral-typesproper-motionsY dwarfs provide a unique opportunity to study free-floating objects with masses <30M_Jup_ and atmospheric temperatures approaching those of known Jupiter-like exoplanets. Obtaining distances to these objects is an essential step toward characterizing their absolute physical properties. Using Spitzer's Infrared Array Camera (IRAC) [4.5] images taken over baselines of ~2-7yrs, we measure astrometric distances for 22 late-T and early Y dwarfs, including updated parallaxes for 18 objects and new parallax measurements for 4 objects. These parallaxes will make it possible to explore the physical parameter space occupied by the coldest brown dwarfs. We also present the discovery of six new late-T dwarfs, updated spectra of two T dwarfs, and the reclassification of a new Y dwarf, WISE J033605.04-014351.0, based on Keck/NIRSPEC J-band spectroscopy. Assuming that effective temperatures are inversely proportional to absolute magnitude, we examine trends in the evolution of the spectral energy distributions of brown dwarfs with decreasing effective temperature. Surprisingly, the Y dwarf class encompasses a large range in absolute magnitude in the near- to mid-infrared photometric bandpasses, demonstrating a larger range of effective temperatures than previously assumed. This sample will be ideal for obtaining mid-infrared spectra with the James Webb Space Telescope because their known distances will make it easier to measure absolute physical properties.2018ApJ...867..109Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/867/109CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)II/328 : AllWISE Data Release (Cutri+ 2013)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/493/L27 : Parallaxes of 10 ultracool subdwarfs (Schilbach+, 2009)J/AJ/153/14 : Sun-neighborhood XXXVIII Nearby M dwarf systems (Winters+,2017)J/AJ/154/147 : Astrometry&photometry late-type dwarfs&subdwarfs (Dahn+, 2017)J/ApJ/752/56 : DKP. III. Parallaxes for 70 ultracool dwarfs (Faherty+, 2012)J/ApJ/753/156 : T/Y brown dwarfs with WISE photometry (Kirkpatrick+, 2012)J/ApJ/783/122 : AllWISE motion survey (Kirkpatrick+, 2014)J/ApJ/810/158 : M,L,T dwarfs fundamental param and SEDs (Filippazzo+,2015)J/ApJ/833/96 : Hawaii IR parallax program. II. Ultracool dwarfs (Liu+, 2016)J/ApJ/842/118 : Brown dwarfs with spectral type later than T6 (Leggett+, 2017)J/ApJ/858/55 : K2 ultracool dwarfs survey. III. M6-L0 flares (Paudel+, 2018)J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)J/ApJS/205/6 : T dwarf population revealed by WISE (Mace+, 2013)J/ApJS/225/10 : Kinematic analysis of M7-L8 dwarfs (Faherty+, 2016)J/AJ/157/101 : Cloud Atlas: HST/WFC3 NIR spectral library (Manjavacas+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/867/109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/867/109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/867/109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/867/109https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/867/109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/867/109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/867/109/targets (Photometry and Spitzer observations of targets (Tables 1 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/867/109/targets?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/867/109/targets?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/867/109/targets?GETtext/xml+votable180.050000true26.736116742.56945830.005555555555555556Cone search capability for table J/ApJ/867/109/table4 (Target coordinates at each epoch)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/867/109/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/867/109/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/867/109/table4?GETtext/xml+votable180.050000true26.736034157542.56942150030.005555555555555556Cone search capability for table J/ApJ/867/109/data (Best-fit astrometric solutions and absolute magnitudes (Tables 5 and 6))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/867/109/data?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/867/109/data?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/867/109/data?GETtext/xml+votable180.050000true26.7355788942.569408060.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJ/867/1096/2471 5024 11174 11435 12223 12519 13446 14033 21078 22245 23184 23530 23767 24927 25228 25270 32580 32652 33031 33616 34304 37404 38928 39835 41276 44338 468838.157980699529898e-21 1.6921341730348006e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/867/109?format=asciiOpticalInfrareddefaultJ/ApJ/867/109/targetsPhotometry and Spitzer observations of targets (Tables 1 and 3)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWISEAWISEA designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharm_WISEAComponent on WISEA J014656.66+423409.9meta.code.multipcharRDisplay the best-fit resultsmeta.ref.urlcharNameShort WISE based Namemeta.idcharprimaryNNumber of coordinates at each epoch for this source (link to Table 4)meta.numberintnullablen_WISEANote on Source (1)meta.notecharSpTInfrared Spectral Type(s)src.spTypecharn_SpTNote(s) on SpT (1)meta.notecharr_SpT[1/7] Reference for SpT (2)meta.ref;pos.frameintl_JMKOLimit flag for JMKOmeta.code.errorcharJMKO[17.6/23.5] MKO J band magnitudemagphot.mag;em.IR.Jfloate_JMKO[0.01/0.3]? Uncertainty in JMKOmagstat.errorfloatnullablen_JMKONote on JMKO (1)meta.notecharl_HMKOLimit flag for HMKOmeta.code.errorcharHMKO[17.7/23.4]? MKO H band magnitudemagphot.mag;em.IR.Hfloatnullablee_HMKO[0.02/0.4]? Uncertainty in HMKOmagstat.errorfloatnullablen_HMKONote on HMKO (1)meta.notecharr_JMKOReference for JMKO, HMKO (2)meta.ref;pos.framecharl_W1magLimit flag for W1magmeta.code.errorcharW1mag[16.4/19.6] WISE W1 band magnitudemagphot.mag;em.IR.3-4umfloate_W1mag[0.07/0.6]? Uncertainty in W1magmagstat.error;phot.magfloatnullableW2mag[13.5/15.8] WISE W2 band magnitudemagphot.mag;em.IR.4-8umfloate_W2mag[0.03/0.2] Uncertainty in W2magmagstat.error;phot.magfloatW3mag[16/17.9] WISE W3 band magnitudemagphot.flux.density;em.IR.8-15umfloate_W3mag[0.01/0.2] Uncertainty in W3magmagstat.error;phot.magfloatW4mag[13.6/15.7] WISE W4 band magnitudemagphot.flux.density;em.IR.15-30umfloate_W4mag[0.01/0.03] Uncertainty in W4magmagstat.error;phot.magfloatFileJName of the FITS file in subdirectory img (Palomar WIRC J-band); column added by CDSmeta.id;meta.fitscharFileHName of the FITS file in subdirectory img (Palomar WIRC H-band); column added by CDSmeta.id;meta.fitscharPID1First Spitzer Program numbermeta.id;obsintn_PID1Number of [4.5] epochs for PID1meta.noteintPID2? Second Spitzer Program numbermeta.id;obsintnullablen_PID2? Number of [4.5] epochs for PID2meta.noteintnullablePID3? Third Spitzer Program numbermeta.id;obsintnullablen_PID3? Number of [4.5] epochs for PID3meta.noteintnullablePID4? Fourth Spitzer Program numbermeta.id;obsintnullablen_PID4? Number of [4.5] epochs for PID4meta.noteintnullableMJDlo[55387.3/57175.2] Lower range of Modified Julian Date of Spitzer observationdtime.epochfloatMJDup[56768.1/57175.3]? Upper range of Modified Julian Date of Spitzer observationdtime.epochfloatnullableAOR1First astronomical observation request number for photometrymeta.id;obsintAOR2? Second astronomical observation request number for photometrymeta.id;obsintnullablef_NameFlag on Name (3)meta.codecharK12Display data from Kirkpatrick+, 2012, J/ApJ/753/156, within 1" if anymeta.ref.urlintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/867/109/table4Target coordinates at each epochrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameShort WISE based Namemeta.id;meta.maincharRAJ2000[26.735/335.231] Target location in Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-75.007/84.02] Target location in Declination (J2000)degpos.eq.dec;meta.maine_RAJ2000[0.01/0.03] Uncertainty in RAdegarcsecstat.error;pos.eq.rafloate_DEJ2000[0.01/0.03] Uncertainty in DEdegarcsecstat.error;pos.eq.decfloatMJD[55387.3/57175.3] Modified Julian Date of observation; JD-2400000.5time.epochdoubleJ/ApJ/867/109/dataBest-fit astrometric solutions and absolute magnitudes (Tables 5 and 6)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameShort WISE based Namemeta.id;meta.maincharRAJ2000[26.735/335.231] Right Ascension, decimal degrees, (J2000) at Ep=2014.0degpos.eq.ra;meta.mainDEJ2000[-75.007/84.02] Declination, decimal degrees, (J2000) at Ep=2014.0degpos.eq.dec;meta.maine_RAJ2000[4.5/93.2] Positional Uncertainty, RAdegmasstat.error;pos.eq.rafloate_DEJ2000[4.3/10.1] Positional Uncertainty, DEdegmasstat.error;pos.eq.decfloatpmRA[-2337/1200] Proper motion, Right Ascensionmas/yrpos.pm;pos.eq.radoublee_pmRA[3/13] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-3105/536] Proper motion, Declinationmas/yrpos.pm;pos.eq.decdoublee_pmDE[3/13] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatplx[45/229] Trigonometric parallax, relativemaspos.parallax.trig;arith.ratiofloate_plx[3.8/9.3] Uncertainty in plxmasstat.error;pos.parallaxfloatDist[4.3/22] Distance (from plx)pcpos.distance;pos.heliocentricfloatE_Dist[0.1/3.8] Upper uncertainty in Distpcstat.error;stat.maxfloate_Dist[0.1/2.8] Lower uncertainty in Distpcstat.errorfloatePos[15/30] Positional uncertainty for astrometric solutionmasstat.error;posintNep[10/16] Number of positional epochsmeta.numberintNref[7/96] Number of reference starsmeta.numberintchi2[9.8/34] {chi}^2 fit statisticstat.weight;stat.fit.param;meta.modelledfloatDOF[14/27] Degrees of Freedom in fitstat.fit.dofintchi2r[0.4/1.7] Reduced {chi}^2meta.notefloatl_JMagLimit flag on Jmagmeta.code.errorcharJMag[16.8/23.8] Absolute 2MASS J magnitudemagphys.magAbsfloate_JMag[0.06/0.4]? Uncertainty in Jmagmagstat.error;phot.magfloatnullablel_HMagLimit flag on Hmagmeta.code.errorcharHMag[16.1/23.7] Absolute 2MASS H magnitudemagphys.magAbsfloate_HMag[0.07/0.5]? Uncertainty in Hmagmagstat.error;phot.magfloatnullable3.6Mag[14.9/19] Absolute Spitzer IRAC/Channel 1 (3.6um) magnitudemagphys.magAbs;em.IR.3-4umfloate_3.6Mag[0.07/0.4] Uncertainty in 3.6magmagstat.errorfloat4.5Mag[13.1/15.9] Absolute Spitzer IRAC/Channel 2 (4.5um) magnitudemagphys.magAbs;em.IR.4-8umfloate_4.5Mag[0.06/0.4] Uncertainty in 4.5magmagstat.errorfloatl_W1MagLimit flag on W1magmeta.code.errorcharW1Mag[15.7/20] Absolute WISE/W1 magnitudemagphys.magAbs;em.IR.3-4umfloate_W1Mag[0.1/7]? Uncertainty in W1magmagstat.error;phot.magfloatnullableW2Mag[13/16] Absolute WISE/W2 magnitudemagphys.magAbs;em.IR.4-8umfloate_W2Mag[0.07/0.4] Uncertainty in W2magmagstat.error;phot.magfloat