J/AJ/130/188ivo://CDS.VizieR/J/AJ/130/188doi:10.26093/cds/vizier.51300188CDSSicilia-Aguilar A.Hartmann L.W.Hernandez J.Briceno C.Calvet N.2007-06-17T11:29:30Z2007-06-17T11:27:05ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometrystellar-spectral-typesline-intensitiespre-main-sequence-starsWe present the results of MMT observations of young stars for our study of protoplanetary disks at ages 1-10Myr in two young clusters located in the Cepheus OB2 region: Trumpler 37 (embedded in the HII region IC 1396) and NGC 7160. Using low-resolution optical spectra from the Hectospec multifiber spectrograph, we have tripled the number of known low-mass cluster members, identifying 130 new members in Tr 37 and 30 in NGC 7160. We use indicators of youth (Li absorption at 6707{AA}) and accretion/chromospheric activity (H{alpha} emission) to identify and classify the low-mass cluster members. We derive spectral types for all the low-mass candidates and calculate the individual extinctions and the average over the clusters.2005AJ....130..188Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/130/188CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/128/805 : Low-mass stars in the Cepheus OB2 region (Sicilia-Aguilar+ 2004)II/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/130/188https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/130/188http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/130/188https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/130/188https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/130/188http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/130/188GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/130/188/table1 (Summary of optical and near-IR observations for low-mass stars in Tr 37)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/188/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/188/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/188/table1?GETtext/xml+votable180.050000true323.784791757.60077780.005555555555555556Cone search capability for table J/AJ/130/188/table2 (Summary of optical and near-IR observations for low-mass stars in NGC 7160)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/188/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/188/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/188/table2?GETtext/xml+votable180.050000true327.588562.71072220.005555555555555556Cone search capability for table J/AJ/130/188/table3 (Summary of spectroscopy, extinction and membership for low-mass stars in Tr 37)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/188/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/188/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/188/table3?GETtext/xml+votable180.050000true323.784791757.60077780.005555555555555556Cone search capability for table J/AJ/130/188/table4 (Summary of spectroscopy, extinction and membership for low-mass stars in NGC 7160)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/188/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/188/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/188/table4?GETtext/xml+votable180.050000true327.588562.71072220.005555555555555556Cone search capability for table J/AJ/130/188/table5 (Summary of optical, near-IR and spectroscopic data for high- and intermediate-mass stars in Tr 37)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/188/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/188/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/188/table5?GETtext/xml+votable180.050000true323.952666757.34119440.005555555555555556Cone search capability for table J/AJ/130/188/table6 (Summary of optical, near-IR, and spectroscopic observations for G-type intermediate-mass stars in NGC 7160)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/188/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/188/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/188/table6?GETtext/xml+votable180.050000true328.044416762.54188890.005555555555555556Cone search capability for table J/AJ/130/188/table7 (Summary of optical, near-IR, and spectroscopic data for high- and intermediate-mass stars (spectral types BAF) in NGC 7160)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/188/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/188/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/188/table7?GETtext/xml+votable180.050000true327.823041762.72808330.0055555555555555565/3869 6/15484 15662 15663 15748 15749https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/130/188?format=asciiOpticalInfrareddefaultJ/AJ/130/188/table1Summary of optical and near-IR observations for low-mass stars in Tr 37recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[SHB2004]The 4Shooter identification (G1)meta.id;meta.mainchar2MASS2MASS identificationmeta.idcharVmag? The V band magnitude (1)magphot.mag;em.opt.VfloatnullableV-Rc? The (V-R)c color index (1)magphot.color;em.opt.V;em.opt.RfloatnullableV-Ic? The (V-I)c color index (1)magphot.color;em.opt.V;em.opt.IfloatnullableJmagThe J band magnitudemagphot.mag;em.IR.Jfloate_Jmag? Error in Jmag (2)magstat.error;phot.mag;em.IR.JfloatnullableHmagThe H band magnitudemagphot.mag;em.IR.Hfloate_Hmag? Error in Hmag (2)magstat.error;phot.mag;em.IR.HfloatnullableKmagThe K band magnitudemagphot.mag;em.IR.Kfloate_Kmag? Error in Kmag (2)magstat.error;phot.mag;em.IR.KfloatnullableVarVariability code (3)meta.code;src.varchar_RAPosition (from 2MASS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (from 2MASS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/130/188/table2Summary of optical and near-IR observations for low-mass stars in NGC 7160Vmag? The V band magnitude (1)magphot.mag;em.opt.Vfloatnullable2MASS2MASS identificationmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[SHB2004]The 4Shooter identification (G1)meta.id;meta.maincharV-Rc? The (V-R)c color index (1)magphot.color;em.opt.V;em.opt.RfloatnullableV-Ic? The (V-I)c color index (1)magphot.color;em.opt.V;em.opt.IfloatnullableJmagThe J band magnitudemagphot.mag;em.IR.Jfloate_Jmag? Error in Jmag (2)magstat.error;phot.mag;em.IR.JfloatnullableHmagThe H band magnitudemagphot.mag;em.IR.Hfloate_Hmag? Error in Hmag (2)magstat.error;phot.mag;em.IR.HfloatnullableKmagThe K band magnitudemagphot.mag;em.IR.Kfloate_Kmag? Error in Kmag (2)magstat.error;phot.mag;em.IR.KfloatnullableVarVariability code (3)meta.code;src.varchar_RAPosition (from 2MASS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (from 2MASS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/130/188/table3Summary of spectroscopy, extinction and membership for low-mass stars in Tr 37MemMember? (G2)meta.code.membercharInstInstrumentmeta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[SHB2004]The 4Shooter identification (G1)meta.id;meta.mainchar2MASS2MASS identificationmeta.idcharSpTypeSpectral type (1)src.spTypechare_SpType? Uncertainty in SpType (2)stat.error;src.spTypefloatnullableEW(Ha)? Equivalent width of H{alpha} (3)0.1nmspect.line.eqWidth;em.line.HalphafloatnullableEW(Li)? Equivalent width of Li(6707{AA}) (3)0.1nmspect.line.eqWidthfloatnullableTTypeT Tauri type (4)meta.notecharAV? Visual extinctionmagphys.absorption;em.opt.VfloatnullableAge? Age (5)Myrtime.agefloatnullableComAdditional comments (6)meta.notechar_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/AJ/130/188/table4Summary of spectroscopy, extinction and membership for low-mass stars in NGC 7160InstInstrumentmeta.id;instrcharSpTypeSpectral type (1)src.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[SHB2004]The 4Shooter identification (G1)meta.id;meta.mainchar2MASS2MASS identificationmeta.idchare_SpType? Uncertainty in SpType (2)stat.error;src.spTypefloatnullableEW(Ha)? Equivalent width of H{alpha} (3)0.1nmspect.line.eqWidth;em.line.HalphafloatnullableEW(Li)? Equivalent width of Li(6707{AA}) (3)0.1nmspect.line.eqWidthfloatnullableTTypeT Tauri type (4)meta.notecharAV? Visual extinctionmagphys.absorption;em.opt.VfloatnullableAge? Age (5)Myrtime.agefloatnullableMemMember? (G2)meta.code.membercharComAdditional comments (6)meta.notechar_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/AJ/130/188/table5Summary of optical, near-IR and spectroscopic data for high- and intermediate-mass stars in Tr 37recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameThe 4Shooter identification (1)meta.id;meta.mainchar2MASS2MASS identificationmeta.idcharBmagThe B band magnitude (2)magphot.mag;em.opt.BfloatVmagThe V band magnitude (2)magphot.mag;em.opt.VfloatJmag? The J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Error in Jmag (3)magstat.error;phot.mag;em.IR.JfloatnullableHmag? The H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Error in Hmag (3)magstat.error;phot.mag;em.IR.HfloatnullableKmag? The K band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Error in Kmagmagstat.error;phot.mag;em.IR.KfloatnullableSpTypeSpectral Type (4)src.spTypecharAVVisual extinctionmagphys.absorption;em.opt.VfloatMemMember? (5)meta.code.memberchar_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/AJ/130/188/table6Summary of optical, near-IR, and spectroscopic observations for G-type intermediate-mass stars in NGC 7160e_JmagError in Jmagmagstat.error;phot.mag;em.IR.JfloatHmagThe H band magnitudemagphot.mag;em.IR.Hfloate_HmagError in Hmagmagstat.error;phot.mag;em.IR.HfloatKmagThe K band magnitudemagphot.mag;em.IR.Kfloate_KmagError in Kmagmagstat.error;phot.mag;em.IR.KfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameThe 4Shooter identification (G1) (G3)meta.id;meta.mainchar2MASS2MASS identificationmeta.idcharVmagThe V band magnitude (G4)magphot.mag;em.opt.VfloatV-RThe (V-R) color index (G4)magphot.color;em.opt.V;em.opt.RfloatV-IThe (V-I) color index (G4)magphot.color;em.opt.V;em.opt.IfloatJmagThe J band magnitudemagphot.mag;em.IR.JfloatSpTypeSpectral Typesrc.spTypechare_SpTypeError in SpTypestat.error;src.spTypefloatAVVisual extinctionmagphys.absorption;em.opt.VfloatMembMember? (G2)meta.code.memberchar_RAPosition (from 2MASS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (from 2MASS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/130/188/table7Summary of optical, near-IR, and spectroscopic data for high- and intermediate-mass stars (spectral types BAF) in NGC 7160recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameThe 4Shooter identification (G1) (G3) (1)meta.id;meta.mainchar2MASS2MASS identificationmeta.idcharVmagThe V band magnitude (G4) (2)magphot.mag;em.opt.VfloatU-BThe (U-B) color index (G4) (2)magphot.color;em.opt.U;em.opt.BfloatB-VThe (B-V) color index (G4) (2)magphot.color;em.opt.B;em.opt.VfloatJmagThe J band magnitudemagphot.mag;em.IR.Jfloate_JmagError in Jmagmagstat.error;phot.mag;em.IR.JfloatHmagThe H band magnitudemagphot.mag;em.IR.Hfloate_HmagError in Hmagmagstat.error;phot.mag;em.IR.HfloatKmagThe K band magnitudemagphot.mag;em.IR.Kfloate_KmagError in Kmagmagstat.error;phot.mag;em.IR.KfloatSpTypeSpectral Typesrc.spTypechare_SpTypeError in SpTypestat.error;src.spTypefloatAVVisual extinctionmagphys.absorption;em.opt.VfloatMembMember? (G2)meta.code.memberchar_RAPosition (from 2MASS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (from 2MASS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/130/188/table8U photometry and mass accretion rates in Tr 37recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[SHB2004]The 4Shooter identification (G1)meta.id;meta.maincharUmagThe U band magnitudemagphot.mag;em.opt.UfloatLUThe U band excess luminosity (1)solLumphys.luminosityfloatLAcc? The accretion band luminosity (1)solLumphys.luminosityfloatnullabledM/dt? Accretion rate1e-08solMass.yr**-1arith.ratefloatnullableu_dM/dtUncertainty flag on dM/dt (2)meta.code.errorcharEpochObservational epoch (3)time.epochint