J/AJ/127/2856ivo://CDS.VizieR/J/AJ/127/2856doi:10.26093/cds/vizier.51272856CDSBurgasser A.J.Mcelwain M.W.Kirkpatrick J.D.Cruz K.L.Tinney C.G.,Reid I.N.2023-04-06T16:51:04Z2005-09-02T16:16:02ZCDS support team

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

cds-question@unistra.frinfrared-sourcesdwarf-starsinfrared-photometryWe present the discovery of seven new T dwarfs identified in the Two Micron All Sky Survey (Cat. <II/246>). Low-resolution (R~150) 0.8-2.5{mu}m spectroscopy obtained with the Infrared Telescope Facility (IRTF) SpeX instrument reveals the characteristic H_2_O and CH_4_ bands in the spectra of these brown dwarfs. Comparison with spectral standards observed with the same instrument enables us to derive classifications of T3 to T7 for the objects in this sample. Moderate-resolution (R~1200) near-infrared spectroscopy for a subset of these discoveries reveal K I line strengths consistent with previously observed trends with spectral type. Follow-up imaging observations provide proper-motion measurements for these sources, ranging from less than 0.1" to 1.55"/yr. One object, 2MASS 0034+0523, has a spectrophotometric distance placing it within 10pc of the Sun. This source also exhibits a depressed K-band peak reminiscent of the peculiar T dwarf 2MASS 0937+2931 and may be a metal-poor or old, high-mass brown dwarf. We also present low-resolution SpeX data for a set of M- and L-type dwarf, subdwarf, and giant comparison stars used to classify 59 additional candidates identified as background stars. These are primarily M5-M8.5 dwarfs, many exhibiting H I Pa^{gamma}^, but include three candidate ultracool M subdwarfs and one possible early-type L subdwarf.2004AJ....127.2856Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/127/2856CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/127/2856https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/127/2856http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/127/2856https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/127/2856https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/127/2856http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/127/2856GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/127/2856/spex (Observations and 2MASS photometry of all stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/127/2856/spex?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/127/2856/spex?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/127/2856/spex?GETtext/xml+votable180.050000true0.376833310.17072220.0055555555555555566/320 322 332 696 2206 2432 2597 2659 4043 5201 5429 8282 8464 8625 8794 9009 9314-9315 10331 11353 12447 12612 12707 12719 12771 13132 13336 13425 13651 13776 13952 15144 15494 15907 16749 17171 17203 17244 18156 18204 18300 18489 18554-18555 19274 19646 19648 20179 22681 22759 23518 24694 24799 25300 25443 25904 26186 26210 26517 26997 27730 28316 28400 29805 29841 30061 30505 30963 31009 31075 31079 31097 31261 31319 31696 31935 32322 32337 32426 32602 32735 35721 36072 36669 44286 46334 46384 47392 47640 47721 47810 48120 48304 48604 48723 48823 49139-491401.5062136169708525e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/127/2856?format=asciiInfrareddefaultJ/AJ/127/2856/spexObservations and 2MASS photometry of all starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS name (3)charm_2MASS[AB] ComponentcharJmag2MASS ADR J magnitudemagfloate_Jmagrms uncertainty on JmagmagfloatJ-H2MASS ADR J-H colour indexmagfloate_J-Hrms uncertainty on J-Hmagfloatl_H-KsLimit flag on H-KscharH-Ks2MASS ADR H-Ks colour indexmagfloate_H-Ks? rms uncertainty on H-KsmagfloatnullableDateUT observation datenullableExpTimeExposure timesintAirMassAirmassfloatAirMass2? Upper limit of airmass when intervalfloatnullableCalibCalibrator namecharSpCalMK spectral type of CalibratorcharClassSpectral Classification of star (1)charn_Class[b] Note on Class for variable giants (2)charRefsReferences detailed in refs.dat filecharVNameVariable name (3)charSimbadSimbad column added by the CDSchar_RAPosition (derived from 2MASS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from 2MASS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/127/2856/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codeintBibCodeBibCodecharAutAuthor's namecharComCommentschar