J/ApJ/844/38ivo://CDS.VizieR/J/ApJ/844/38doi:10.26093/cds/vizier.18440038CDSWolf-Chase G.Arvidsson K.Smutko M.2018-05-16T09:11:28Z2018-04-03T12:33:32ZCDS support team

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

cds-question@unistra.frinfrared-photometryh-ii-regionsinterstellar-mediumyoung-stellar-objectsWe present the results of a narrow-band near-infrared imaging survey for Molecular Hydrogen emission-line Objects (MHOs) toward 26 regions containing high-mass protostellar candidates and massive molecular outflows. We have detected a total of 236 MHOs, 156 of which are new detections, in 22 out of the 26 regions. We use H_2_2.12{mu}m/H_2_2.25{mu}m flux ratios, together with morphology, to separate the signatures of fluorescence associated with photo- dissociation regions (PDRs) from shocks associated with outflows in order to identify the MHOs. PDRs have typical low flux ratios of ~1.5-3, while the vast majority of MHOs display flux ratios typical of C-type shocks (~6-20). A few MHOs exhibit flux ratios consistent with expected values for J-type shocks (~3-4), but these are located in regions that may be contaminated with fluorescent emission. Some previously reported MHOs have low flux ratios, and are likely parts of PDRs rather than shocks indicative of outflows. We identify a total of 36 outflows across the 22 target regions where MHOs were detected. In over half these regions, MHO arrangements and fluorescent structures trace features present in CO outflow maps, suggesting that the CO emission traces a combination of dynamical effects, which may include gas entrained in expanding PDRs as well as bipolar outflows. Where possible, we link MHO complexes to distinct outflows and identify candidate driving sources.2017ApJ...844...38Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/844/38CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)J/ApJS/91/659 : Ultracompact HII regions radio images (Kurtz+ 1994)J/A+A/308/573 : Ammonia on YSOs IRAS sources (Molinari+ 1996)J/A+AS/132/211 : Interstellar SiO sources (Harju+ 1998)J/A+A/336/339 : VLA obs. of ultracompact HII regions (Molinari+, 1998)J/AJ/117/446 : AFGL 5157 near-IR imaging (Chen+, 1999)J/ApJ/629/288 : Infrared sources near AFGL 5142 (Chen+, 2005)J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)J/A+A/481/345 : SED evolution in massive YSOs (Molinari+, 2008)J/A+A/511/A24 : MHO Catalogue (Davis+, 2010)J/A+A/510/A5 : CO(2-1) maps of IRAS 00117+6412 (Palau+, 2010)J/MNRAS/404/661 : Young stellar outflows near-IR imaging (Varricatt+ 2010)J/MNRAS/418/1994 : GM 2-4 H_2_ emission-line objects (Khanzadyan+, 2011)J/ApJS/208/11 : Red MSX Source Survey: massive protostars (Lumsden+, 2013)J/ApJS/212/1 : The WISE catalog of Galactic HII regions (Anderson+, 2014)J/ApJ/784/111 : Cand. intermediate-mass SFRs morphology (Lundquist+, 2014)J/ApJ/799/153 : Yellowballs in Milky Way project (Kerton+, 2015)J/ApJ/827/96 : WISE census of YSOs in Canis Major (Fischer+, 2016)J/MNRAS/462/1444 : MHO catalogue for Cassiopeia and Auriga (Froebrich+, 2016)http://astro.kent.ac.uk/~df/MHCat/ : MHO online cataloguehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/844/38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/844/38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/844/38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/844/38https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/844/38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/844/38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/844/38/table3 (Molecular Hydrogen emission-line Objects (MHOs) and fluxes in 22 regions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/844/38/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/844/38/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/844/38/table3?GETtext/xml+votable180.050000true3.637564.47750.005555555555555556Cone search capability for table J/ApJ/844/38/table1 (Observation log of the 26 regions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/844/38/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/844/38/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/844/38/table1?GETtext/xml+votable180.050000true3.61541764.4794440.0055555555555555566/1307 1340 2973 3068 13050 14255 14267 14299 14314 14352 14354 14355 14614 14622 14625 14647 14692 15430 19226 21671 24189 24325 24499 24507 24508 30151 30316 30715https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/844/38?format=asciiInfrareddefaultJ/ApJ/844/38/table2Source detections and associations with massive star formation in the 26 regionsMol[2/160] Molinari number (G1)meta.idintf_MolFlag on target (1)meta.codecharTypeType (2)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS designation (HHMMm+DDMM, B1950)meta.id;meta.maincharprimaryNmhometa.numberintnullableMHOs?[Y/N ] Whether a targeted region contains MHOsmeta.codecharCol?[Y/N ] Collimated outflow(s) identified?meta.codechar[ABB2014]WISE name (GLLL.lll+BB.bbb) (3)meta.id.assoccharHIIHII type (4)meta.codecharRMSMSX name (GLLL.llll+BB.bbbbA) (5)meta.id.assoccharClRMS type (5)src.classcharICatDisplay data from the IRAS point sources catalog (II/125)meta.ref.urlcharJ/ApJ/844/38/table3Molecular Hydrogen emission-line Objects (MHOs) and fluxes in 22 regionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS designationobs.fieldcharMol[2/160] Molinari number (G1)meta.id.crossintMHOMHO identifiermeta.id;meta.maincharRAJ2000Right Ascension hours (J2000)pos.eq.ra;meta.mainDEJ2000Declination degrees (J2000)pos.eq.dec;meta.mainArea[0.2/46.3]? Area of MHO region1e-10srphys.areafloatnullableF2.12[0.3/825]? NICFPS flux in 2.12um band1e-18W.m**-2phot.flux;em.IR.Kfloatnullablee_F2.12[0.03/54]? Error in F2.121e-18W.m**-2stat.errorfloatnullableF2.25[0.1/138]? NICFPS flux in 2.25um band1e-18W.m**-2phot.flux;em.IR.Kfloatnullablee_F2.25[0.04/10]? Error in F2.251e-18W.m**-2stat.errorfloatnullablel_F2.12/F2.25Limit flag on F2.12/F2.25meta.code.errorcharF2.12/F2.25[1/85]? Ratio of 2.12 to 2.25um fluxesphot.flux;arith.ratiofloatnullablee_F2.12/F2.25[0.1/11]? Error in F2.12/F2.25stat.errorfloatnullableCommComments on each source (1)meta.notecharJ/ApJ/844/38/table1Observation log of the 26 regionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIRASIRAS designation (HHMMm+DDMM, B1950)meta.id;meta.maincharprimaryMol[2/160] Molinari number (G1)meta.idintRAJ2000Center position: hour of RA (J2000)pos.eq.ra;meta.mainDEJ2000Center position: degree of DE (J2000)pos.eq.dec;meta.mainFilterFiltermeta.id;instr.filterDateUT date(s) of observation (YYMMDD)time.epoch;obscharExp[1200/5400]? Total exposure timestime.duration;obs.exposureintnullableFWHM[0.7/1.5]? Resolutionarcsecphys.angSizefloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar