J/ApJ/727/64ivo://CDS.VizieR/J/ApJ/727/64doi:10.26093/cds/vizier.17270064CDSKirk H.Myers P.C.2017-09-29T09:03:19Z2012-09-14T08:46:22ZCDS support team

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

cds-question@unistra.frstellar-massesyoung-stellar-objectsstellar-spectral-typesmolecular-cloudsstellar-associationsWe analyze the masses and spatial distributions of 14 young stellar groups in Taurus, Lupus3, ChaI, and IC348. These nearby groups, which typically contain 20-40 members, have membership catalogs complete to ~0.02M_{sun}_, and are sufficiently young that their locations should be similar to where they formed. These groups show five properties seen in clusters having many more stars and much greater surface density of stars: (1) a broad range of masses, (2) a concentration of the most massive star toward the center of the group, (3) an association of the most massive star with a high surface density of lower mass stars, (4) a correlation of the mass of the most massive star with the total mass of the group, and (5) the distribution of a large fraction of the mass in a small fraction of the stars.2011ApJ...727...64Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/727/64CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/A+A/537/A135 : X-ray view of IC348 (Stelzer+, 2012)J/ApJS/196/4 : New young star candidates in Taurus-Auriga (Rebull+, 2011)J/ApJ/703/1964 : Spectra of three nearby star-forming regions (Furlan+, 2009)J/ApJ/684/654 : Low-mass members of Chamaeleon I (Luhman+, 2008)J/ApJ/675/1375 : IRAC/MIPS photometry in Cha I (Luhman+, 2008)J/ApJS/177/551 : Spitzer c2d survey of Lupus dark clouds (Merin+, 2008)J/AJ/134/411 : Properties of IC 348 members (Muench+, 2007)J/ApJS/173/104 : Stellar population in Chamaeleon I (Luhman, 2007)J/AJ/131/1574 : Infrared photometry of IC348 members (Lada+, 2006)J/A+A/454/595 : X-ray emission of T Tau stars in Lupus 3 (Gondoin, 2006)J/ApJ/578/914 : Low-mass stars in Taurus (Hartmann, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/727/64https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/727/64http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/727/64https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/727/64https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/727/64http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/727/64GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/727/64/table3 (YSO catalog for Taurus (from Luhman et al. 2010ApJS..186..111L; see Appendix A.1.))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/727/64/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/727/64/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/727/64/table3?GETtext/xml+votable180.050000true60.955458326.18111940.005555555555555556Cone search capability for table J/ApJ/727/64/table5 (YSO catalog for Lupus3 (from Comeron F. 2008hsf2.book..295C; see Appendix A.3.))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/727/64/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/727/64/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/727/64/table5?GETtext/xml+votable180.050000true238.4216667-39.01055560.005555555555555556Cone search capability for table J/ApJ/727/64/table4 (*YSO catalog for ChaI (mainly from Luhman et al. 2007, Cat. J/ApJS/173/104))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/727/64/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/727/64/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/727/64/table4?GETtext/xml+votable180.050000true166.1773333-77.6992250.005555555555555556Cone search capability for table J/ApJ/727/64/table6 (YSO catalog for IC348 (mainly from Lada et al., Cat. J/AJ/131/1574 and Muench et al., Cat. J/AJ/134/411; see Appendix A.4.))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/727/64/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/727/64/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/727/64/table6?GETtext/xml+votable180.050000true56.142541732.16297220.0055555555555555565/270 292 9239 9282 6/325 336 337 342 350 377 1029 1030 1031 1033 1036 1037 1039 1040 1042 1043 1047 1048 1050 1051 1052 1053 1054 1061 1063 1068 1069 1073 1074 1075 1078 1079 1084 1111 1113 1114 1115 1123 1124 1126 1136 1154 1156 1157 1159 1164 1176 1180 1539 23517 23533 23542 23543 23548 23549 23551 24201 24203 24221 24232 24294 24295 24300 36953 36955 37122 37123 37132 42605 42609 42610 42611 42612 42614 42617 42693https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/727/64?format=asciiOpticaldefaultJ/ApJ/727/64/table3YSO catalog for Taurus (from Luhman et al. 2010ApJS..186..111L; see Appendix A.1.)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.main2MASSSource designation (JHHMMSSss+DDMMSSs)meta.id;meta.maincharONameOther designationmeta.idcharSpTypeMK spectral typesrc.spTypecharf_SpType[c] Flag on SpType (1)meta.codecharMassEstimated mass from Appendix C proceduresolMassphys.massfloatGroup? YSO MST group number (G1)meta.idintnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246) within 3"meta.ref.urlcharJ/ApJ/727/64/table5YSO catalog for Lupus3 (from Comeron F. 2008hsf2.book..295C; see Appendix A.3.)SimbadNameSimbad column added by the CDSmeta.idcharNameSource designationmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainSpTypeMK spectral typesrc.spTypecharMassEstimated mass from Appendix C proceduresolMassphys.massfloatGroup? YSO MST group number (G1)meta.idintnullable2MCross-match with the 2MASS catalog within 3"meta.ref.urlintnullableJ/ApJ/727/64/table4*YSO catalog for ChaI (mainly from Luhman et al. 2007, Cat. J/ApJS/173/104)SimbadNameSimbad column added by the CDSmeta.idchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246) within 3"meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.main2MASSSource designation (JHHMMSSss+DDMMSSs)meta.id;meta.maincharONameOther designationmeta.idcharSpTypeMK spectral typesrc.spTypecharf_SpType[c] Flag on SpType (1)meta.codecharMassEstimated mass from Appendix C proceduresolMassphys.massfloatGroup? YSO MST group number (G1)meta.idintnullableOCatCross-match with Luhman et al., Cat. J/ApJS/173/104 within 1.5"meta.ref.urlintnullableJ/ApJ/727/64/table6YSO catalog for IC348 (mainly from Lada et al., Cat. J/AJ/131/1574 and Muench et al., Cat. J/AJ/134/411; see Appendix A.4.)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainNameSource designationmeta.id;meta.maincharSpTypeMK spectral typesrc.spTypecharMassEstimated mass from Appendix C proceduresolMassphys.massfloatGroup? YSO MST group number (G1)meta.idintnullableOCatCross-match with other IC348 catalogs within 3"meta.ref.urlintnullable2MCross-match with the 2MASS catalog within 3"meta.ref.urlintnullable