V/144ivo://CDS.VizieR/V/144CDSMace G.N.2018-01-08T06:38:02Z2014-11-10T15:36:02ZCDS support team

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

cds-question@unistra.frdwarf-starsmultiple-starsinfrared-sourcesinfrared-photometryThe mass of a star at formation determines its subsequent evolution and demise. Low-mass stars are the most common products of star formation and their long main-sequence lifetimes cause them to accumulate over time. Star formation also produces many substellar-mass objects known as brown dwarfs, which emerge from their natal molecular clouds and continually cool as they age, pervading the Milky Way. Low-mass stars and brown dwarfs exhibit a wide range of physical characteristics and their abundance make them ideal subjects for testing formation and evolution models. I have examined a pair of pre-main sequence spectroscopic binaries and used radial velocity variations to determine orbital solutions and mass ratios. Additionally, I have employed synthetic spectra to estimate their effective temperatures and place them on theoretical Hertzsprung-Russell diagrams. From this analysis I discuss the formation and evolution of young binary systems and place bounds on absolute masses and radii. I have also studied the late-type T dwarfs revealed by the Wide-field Infrared Survey Explorer (WISE). This includes the exemplar T8 subdwarf Wolf 1130C, which has the lowest inferred metallicity in the literature and spectroscopic traits consistent with old age. Comparison to synthetic spectra implies that the dispersion in near-infrared colors of late-type T dwarfs is a result of age and/or thin sul de clouds. With the updated census of the L, T, and Y dwarfs we can now study specific brown dwarf subpopulations. Finally, I present a number of future studies that would develop our understanding of the physical qualities of T dwarf color outliers and disentangle the tracers of age and atmospheric properties. The thesis is available at: http://www.astro.ucla.edu/~gmace/thesis.html2014yCat.5144....0Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/V/144CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/311 : WISE All-Sky Data Release (Cutri+ 2012)J/ApJS/190/100 : NIR proper motion survey using 2MASS (Kirkpatrick+, 2010)J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)J/AJ/142/77 : New T dwarfs identified in Pan-STARRS 1 (Deacon+, 2011)J/ApJ/753/156 : T/Y brown dwarfs with WISE photometry (Kirkpatrick+, 2012)J/ApJS/205/6 : T dwarf population revealed by WISE (Mace+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=V/144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=V/144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=V/144https://vizier.cds.unistra.fr/viz-bin/votable?-source=V/144https://vizier.iucaa.in/viz-bin/votable?-source=V/144http://vizieridia.saao.ac.za/viz-bin/votable?-source=V/144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table V/144/newBD (New brown dwarf discoveries: WISE photometry (table42, plus WISE data for J200520.38+542433.9) and spectrophotometric distance estimates (table62))https://vizier.cds.unistra.fr/viz-bin/conesearch/V/144/newBD?https://vizier.iucaa.in/viz-bin/conesearch/V/144/newBD?http://vizieridia.saao.ac.za/viz-bin/conesearch/V/144/newBD?GETtext/xml+votable180.050000true1.322833337.62236110.005555555555555556Cone search capability for table V/144/table41 (WISE All-Sky photometry for discoveries from Kirkpatrick et al. (2011, Cat. J/ApJS/197/19))https://vizier.cds.unistra.fr/viz-bin/conesearch/V/144/table41?https://vizier.iucaa.in/viz-bin/conesearch/V/144/table41?http://vizieridia.saao.ac.za/viz-bin/conesearch/V/144/table41?GETtext/xml+votable180.050000true2.2072917-17.65636110.005555555555555556Cone search capability for table V/144/table64 (The brown dwarf census through 2014 February)https://vizier.cds.unistra.fr/viz-bin/conesearch/V/144/table64?https://vizier.iucaa.in/viz-bin/conesearch/V/144/table64?http://vizieridia.saao.ac.za/viz-bin/conesearch/V/144/table64?GETtext/xml+votable180.050000true0.0564163925.9050.0055555555555555566/0 2 10 22 48 56 64 65 66 72 77 133 207 221 222 223 239 320 322 369 439 445 455 464 496 544 546 548 549 550 580 586 628 672 713 733 734 736 743 749 762 763 771 849 858 872 906 935 1006 1015 1028 1188 1499 1637 1672 1692 1703 1765 1825 2040 2044 2083 2255 2260 2291 2357 2366 2441 2471 2502 2538 2608 2646 2789 3040 3120 3406 3441 3764 3946 3965 4049 4074 4097 4116 4131 4160 4166 4173 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48990 49016 49077 49139 491408.988462024794503e-21 5.929689329612675e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/V/144?format=asciiInfrareddefaultV/144/newBDNew brown dwarf discoveries: WISE photometry (table42, plus WISE data for J200520.38+542433.9) and spectrophotometric distance estimates (table62)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWISEWISE name (JHHMMSS.ss+DDMMSS.s, II/311)meta.id;meta.maincharn_WISENote on source (G1)meta.notecharSpTypeSpectral typesrc.spTypecharW2MAGAbsolute W2 magnitude (2)magphys.magAbsfloatDist[7/46] Distance (+/-3pc)pcpos.distance;pos.heliocentricintl_W1magLimit flag on W1magmeta.code.errorcharW1magW1 (3.35um) magnitudemagphot.mag;em.IR.3-4umfloate_W1mag? rms uncertainty on W1magmagstat.error;phot.magfloatnullableW2magW2 (4.6um) magnitudemagphot.mag;em.IR.4-8umfloate_W2mag? rms uncertainty on W2magmagstat.error;phot.magfloatnullablel_W3magLimit flag on W3magmeta.code.errorcharW3magW3 (11.6um) magnitudemagphot.flux.density;em.IR.8-15umfloate_W3mag? rms uncertainty on W3magmagstat.error;phot.magfloatnullablel_W4magLimit flag on W4magmeta.code.errorcharW4magW4 (22.1um) magnitudemagphot.flux.density;em.IR.15-30umfloate_W4mag? rms uncertainty on W4magmagstat.error;phot.magfloatnullablel_W1-W2Limit flag on W1-W2meta.code.errorcharW1-W2W1-W2 colour indexmagphot.color;em.IR;em.IRfloate_W1-W2? rms uncertainty on W1-W2magstat.errorfloatnullablel_W2-W3Limit flag on W2-W3meta.code.errorcharW2-W3W2-W3 colour indexmagphot.color;em.IR;em.IRfloate_W2-W3? rms uncertainty on W2-W3magstat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from WISE name (right ascension part)degpos.eq.ra;meta.main_DEPosition from WISE name (declination part)degpos.eq.dec;meta.mainV/144/table41WISE All-Sky photometry for discoveries from Kirkpatrick et al. (2011, Cat. J/ApJS/197/19)l_W2-W3Limit flag on W2-W3meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWISEWISE name (JHHMMSS.ss+DDMMSS.s, II/311)meta.id;meta.maincharn_WISENote on source (G1)meta.notecharSpTypeSpectral type from Kirkpatricket al. 2011 (J/ApJS/197/19)src.spTypecharl_W1magLimit flag on W1magmeta.code.errorcharW1magW1 (3.35um) magnitudemagphot.mag;em.IR.3-4umfloate_W1mag? rms uncertainty on W1magmagstat.error;phot.magfloatnullableW2magW2 (4.6um) magnitudemagphot.mag;em.IR.4-8umfloate_W2mag? rms uncertainty on W2magmagstat.error;phot.magfloatnullablel_W3magLimit flag on W3magmeta.code.errorcharW3magW3 (11.6um) magnitudemagphot.flux.density;em.IR.8-15umfloate_W3mag? rms uncertainty on W3magmagstat.error;phot.magfloatnullablel_W4magLimit flag on W4magmeta.code.errorcharW4magW4 (22.1um) magnitudemagphot.flux.density;em.IR.15-30umfloate_W4mag? rms uncertainty on W4magmagstat.error;phot.magfloatnullablel_W1-W2Limit flag on W1-W2meta.code.errorcharW1-W2W1-W2 colour indexmagphot.color;em.IR;em.IRfloate_W1-W2? rms uncertainty on W1-W2magstat.errorfloatnullableW2-W3W2-W3 colour indexmagphot.color;em.IR;em.IRfloate_W2-W3? rms uncertainty on W2-W3magstat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from WISE name (right ascension part)degpos.eq.ra;meta.main_DEPosition from WISE name (declination part)degpos.eq.dec;meta.mainV/144/table61Peak-Flux ratios for T Dwarfs in Mace et al., 2013ApJ...777...36MSimbadNameSimbad column added by the CDSmeta.idcharInstInstrumentmeta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSample[A-E] Sample (1)src.samplecharNameObject name (some names are truncated)meta.id;meta.maincharSpTypeNIR spectral type (2)src.spTypecharY/J? Y/J peak-flux ratiophot.flux;arith.ratiofloatnullablee_Y/J? rms uncertainty on Y/Jstat.errorfloatnullableH/J? H/J peak-flux ratiophot.flux;arith.ratiofloatnullablee_H/J? rms uncertainty on H/Jstat.errorfloatnullableK/J? K/J peak-flux ratiophot.flux;arith.ratiofloatnullablee_K/J? rms uncertainty on K/Jstat.errorfloatnullableV/144/table63The L, T, and Y dwarf census through 2014 February discovery surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpTypeSpectral Type (1)src.spTypecharSDSSNumber of stars with the spectral type in SDSSmeta.numberint2MASSNumber of stars with the spectral type in 2MASSmeta.numberintDENISNumber of stars with the spectral type in DENISmeta.numberOtherNumber of stars with the spectral type in other surveys (2)meta.numberintCFBDSNumber of stars with the spectral type in CFBDSmeta.numberintUKIDSSNumber of stars with the spectral type in UKIDSSmeta.numberintWISENumber of stars with the spectral type in WISEmeta.numberintTotalTotal of stars with the spectral typemeta.numberintV/144/table64The brown dwarf census through 2014 FebruarySimbadNameSimbad column added by the CDSmeta.idcharNameDiscovery name(s)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintr_NameDiscovery reference, in refs.dat filemeta.ref;pos.framecharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainOTypeOptical type (1)src.spTypecharr_OTypeOptical type reference, in refs.dat filemeta.notecharNIRTypeNear-IR type (1)src.spTypecharr_NIRTypeNear-IR type reference, in refs.dat filemeta.notecharV/144/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar