J/ApJ/678/200ivo://CDS.VizieR/J/ApJ/678/200doi:10.26093/cds/vizier.16780200CDSCaulet A.Gruendl R.A.Chu Y.-H.2017-06-30T05:47:52Z2010-09-29T11:24:39ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometrymagellanic-cloudsh-ii-regionsWe used Spitzer infrared observations to find the young stars of two HII regions in the Large Magellanic Cloud, N63 and N180. The young stellar object (YSO) candidates were identified in each nebula by means of color-color, color-magnitude diagrams, and the shapes of their spectral energy distributions (SEDs). The most luminous YSOs are found near the ionization fronts within strong 8um emission clumps. Most YSOs, less luminous, are seen in projection inside the HII regions. HST images show several Class I stars that have emerged along the borders of the HII regions; other YSOs are embedded in cometary clouds. The most luminous YSO of N63 is connected to a string of pointlike sources. Its SED can be modeled by a central source of stellar mass M_*_ between 7 and 11M_{sun}_, with a circumstellar disk of outer radius R_d_ of ~55AU, and an envelope of moderate accretion rate, M_env_ of ~2x10^-5^M_{sun}_/yr. N180 is experiencing a phase of star formation more intense than N63, attested by the properties of its most luminous YSO: M_*_ of 25M_{sun}_, R_d_ of ~200AU, and M_env_ of ~1.5x10^-3^M_{sun}_/yr. The modes of triggered star formation in N63 and N180 appear similar to those seen in Galactic HII regions.2008ApJ...678..200Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/678/200CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/405/111 : LMC Survey of Young Stellar Systems (Gouliermis+, 2003)J/ApJS/184/172 : High- and intermediate-mass YSOs in the LMC (Gruendl+, 2009)J/ApJ/699/150 : Spectral classifications of Massive YSOs in LMC (Seale+,https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/678/200https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/678/200http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/678/200https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/678/200https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/678/200http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/678/200GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/678/200/table3 (Galaxies and AGB stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/678/200/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/678/200/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/678/200/table3?GETtext/xml+votable180.050000true84.6335-66.26066670.005555555555555556Cone search capability for table J/ApJ/678/200/YSOs (YSOs properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/678/200/YSOs?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/678/200/YSOs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/678/200/YSOs?GETtext/xml+votable180.050000true83.70325-66.14922220.005555555555555556Spitzer6/33089 33091 33092 33094 33110 331166.772611666688002e-21 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/678/200?format=asciiInfrareddefaultJ/ApJ/678/200/table3Galaxies and AGB starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField of viewphys.angSize;instr.fovcharf_Field[cd] Flag on Field (1)meta.codecharclAGB or Galaxy type (2)src.classcharf_cl[e] superimposed sources (3)meta.codecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainJmag? 2MASS J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Jmag uncertaintymagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Hmag uncertaintymagstat.error;phot.mag;em.IR.HfloatnullableKsmag? 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? Ksmag uncertaintymagstat.error;phot.mag;em.IR.Kfloatnullable3.6magSpitzer/IRAC 3.6um magnitude (G1)magphot.mag;em.IR.3-4umfloate_3.6mag3.6mag uncertainty (G1)magstat.errorfloat4.5magSpitzer/IRAC 4.5um magnitude (G1)magphot.mag;em.IR.4-8umfloate_4.5mag4.5mag uncertainty (G1)magstat.errorfloat5.8magSpitzer/IRAC 5.8um magnitude (G1)magphot.flux.density;em.IR.4-8umfloate_5.8mag5.8mag uncertainty (G1)magstat.errorfloat8.0magSpitzer/IRAC 8.0um magnitude (G1)magphot.flux.density;em.IR.8-15umfloate_8.0mag8.0mag uncertainty (G1)magstat.errorfloat24mag? Spitzer/MIPS 24.0um magnitude (G1)magphot.flux.density;em.IR.15-30umfloatnullablee_24mag? 24mag uncertainty (G1)magstat.errorfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/ApJ/678/200/YSOsYSOs propertiesNameYSO name (see Nomenclature notes) (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintregSimbad column added by the CDSmeta.id.parentcharn_Name[f-mF-W] Note on YSOs. See notes.dat file (6)meta.notecharcl[1/2/fs ] YSO class (2)src.classcharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainf_Jmag[*] This paper ISPI Jmag; 2MASS otherwisemeta.codecharJmag? 2MASS J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Jmag uncertaintymagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Hmag uncertaintymagstat.error;phot.mag;em.IR.Hfloatnullablef_Ksmag[*] This paper ISPI Ksmag; 2MASS otherwisemeta.codecharKsmag? 2MASS Ks-band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? Ksmag uncertaintymagstat.error;phot.mag;em.IR.Kfloatnullable3.6magSpitzer/IRAC 3.6um magnitude (G1)magphot.mag;em.IR.3-4umfloate_3.6mag3.6mag uncertainty (G1)magstat.errorfloat4.5magSpitzer/IRAC 4.5um magnitude (G1)magphot.mag;em.IR.4-8umfloate_4.5mag4.5mag uncertainty (G1)magstat.errorfloat5.8magSpitzer/IRAC 5.8um magnitude (G1)magphot.flux.density;em.IR.4-8umfloate_5.8mag5.8mag uncertainty (G1)magstat.errorfloat8.0magSpitzer/IRAC 8.0um magnitude (G1)magphot.flux.density;em.IR.8-15umfloate_8.0mag8.0mag uncertainty (G1)magstat.errorfloat24mag? Spitzer/MIPS 24.0um magnitude (G1) (3)magphot.flux.density;em.IR.15-30umfloatnullablee_24mag? 24mag uncertainty (G1) (3)magstat.errorfloatnullableSepYSO separation from center of HII region (4)arcsecpos.angDistanceintm[1-3m-] Multiplicity (5)meta.codechar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/ApJ/678/200/notesNotes on YSOsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlagNote designationmeta.code.errorcharNoteText of notemeta.notechar