J/ApJ/833/193ivo://CDS.VizieR/J/ApJ/833/193doi:10.26093/cds/vizier.18330193CDSRomine G.Feigelson E.D.Getman K.V.Kuhn M.A.Povich M.S.2019-06-05T11:52:50Z2017-05-17T12:11:21ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometryx-ray-sourcessurveysThe Massive Young Star-Forming Complex in Infrared and X-ray (MYStIX) project provides a new census on stellar members of massive star-forming regions within 4kpc. Here the MYStIX Infrared Excess catalog and Chandra-based X-ray photometric catalogs are mined to obtain high-quality samples of Class I protostars using criteria designed to reduce extragalactic and Galactic field star contamination. A total of 1109 MYStIX Candidate Protostars (MCPs) are found in 14 star-forming regions. Most are selected from protoplanetary disk infrared excess emission, but 20% are found from their ultrahard X-ray spectra from heavily absorbed magnetospheric flare emission. Two-thirds of the MCP sample is newly reported here. The resulting samples are strongly spatially associated with molecular cores and filaments on Herschel far-infrared maps. This spatial agreement and other evidence indicate that the MCP sample has high reliability with relatively few "false positives" from contaminating populations. But the limited sensitivity and sparse overlap among the infrared and X-ray subsamples indicate that the sample is very incomplete with many "false negatives." Maps, tables, and source descriptions are provided to guide further study of star formation in these regions. In particular, the nature of ultrahard X-ray protostellar candidates without known infrared counterparts needs to be elucidated.2016ApJ...833..193Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/833/193CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/453/2006 : NGC 2264 SCUBA-2 observations (Buckle+, 2015)J/ApJS/219/21 : Deep NIR survey toward Aquila. I. MHOs (Zhang+, 2015)J/ApJ/802/60 : Structure of young stellar clusters. II. (Kuhn+, 2015)J/ApJS/213/1 : The MSFRs Omnibus X-ray Catalog (MOXC) (Townsley+, 2014)J/ApJ/787/107 : Spatial structure of young stellar clusters. I. (Kuhn+, 2014)J/MNRAS/437/1561 : DR 21 Chandra source catalogue (Rivilla+, 2014)J/A+A/561/A12 : W3 Main JHKs photometry (Bik+, 2014)J/ApJS/209/32 : Probable young stars in the MYStIX project (Broos+, 2013)J/ApJS/209/31 : The MYStIX IR-Excess Source catalog (MIRES) (Povich+, 2013)J/ApJS/209/30 : MYStIX project: Bayesian matching (Naylor+, 2013)J/ApJS/209/29 : MYStIX: Mid-IR observations and catalogs (Kuhn+, 2013)J/ApJS/209/28 : MYStIX Wide-Field NIR data: crowded fields (King+, 2013)J/ApJS/209/27 : MYStIX: the Chandra X-ray sources (Kuhn+, 2013)J/ApJ/779/113 : IR photometry of YSOs in the W40 region (Mallick+, 2013)J/ApJ/778/96 : Spitzer and NEWFIRM observations of NGC 6334 (Willis+, 2013)J/A+A/557/A29 : Young stellar clusters in the Rosette (Cambresy+, 2013)J/ApJS/206/9 : New EGOs from Spitzer GLIMPSE II survey. I. (Chen+, 2013)J/A+A/553/A48 : Near-infrared variability in RCW 38 (Doerr+, 2013)J/ApJ/767/36 : APEX observations of HOPS protostars (Stutz+, 2013)J/ApJ/743/166 : X-ray and infra-red study of RCW 38 (Winston+, 2011)J/ApJ/743/39 : Spitzer obs. of W3 molecular cloud (Rivera-Ingraham+, 2011)J/ApJ/725/2485 : X-rays from the star-forming complex W40 (Kuhn+, 2010)J/AJ/140/1214 : NIR spectroscopic survey of class I YSOs (Connelley+, 2010)J/AJ/140/968 : A cluster of compact radio sources in W40 (Rodriguez+, 2010)J/ApJ/716/474 : The Rosette star-forming complex. III. (Wang+, 2010)J/A+A/515/A55 : NGC 6334-NGC 6357 complex (Russeil+, 2010)J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010)J/ApJ/714/L285 : YSO candidates in M17 SWex (Povich+, 2010)J/ApJ/707/1 : Water and Methanol masers in NGC 6334I(N) (Brogan+, 2009)J/AJ/138/1116 : A Spitzer view of NGC 2264 (Sung+, 2009)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/AJ/138/227 : Stellar clusters in NGC 6334 complex (Feigelson+, 2009)J/AJ/138/33 : VLT JHKs imaging of RCW 38 (Derose+, 2009)J/ApJ/696/1278 : The extended star-forming environment of M17 (Povich+, 2009)J/AJ/136/2391 : GLIMPSE Extended Green Objects catalog (Cyganowski+, 2008)J/ApJ/685/1005 : Spitzer and high-mass star forming regions (Qiu+, 2008)J/ApJS/169/353 : Chandra sources in M17 (Broos+, 2007)J/ApJS/168/100 : X-ray study of star-forming region NGC 6357 (Wang+, 2007)J/ApJ/654/347 : Chandra X-ray observations in Eagle Nebula. I. (Linsky+, 2007)J/ApJ/654/338 : Spitzer photometry in W3 molecular cloud (Ruch+, 2007)J/AJ/132/1100 : X-ray and IR sources in RCW 38 (Wolk+, 2006)J/A+A/455/903 : ACIS-I observations of NGC 2264 (Flaccomio+, 2006)J/ApJ/643/965 : Spitzer photometry of the Trifid nebula (M20) (Rho+, 2006)J/AJ/128/1684 : NGC 2264: VRIH{alpha} photometry (Sung+, 2004)J/ApJ/607/904 : Chandra obs. of Trifid nebula (Rho+, 2004)J/AJ/127/2659 : CHANDRA observations of NGC 2264 (Ramirez+, 2004)J/A+A/417/557 : Rotation + variability of PMS Stars in NGC 2264 (Lamm, 2004)J/AJ/126/1423 : MSX 8.3um fluxes of star-forming regions (Kraemer+, 2003)J/A+A/316/102 : JHK Photometry in NGC 6334 (Tapia+, 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/833/193https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/833/193http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/833/193https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/833/193https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/833/193http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/833/193GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/833/193/table1 (MYStIX fields summary)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/193/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/193/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/193/table1?GETtext/xml+votable180.050000true36.767083361.87419440.005555555555555556Cone search capability for table J/ApJ/833/193/table2 (MYStIX candidate protostars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/193/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/193/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/193/table2?GETtext/xml+votable180.050000true36.1280561.838590.0055555555555555565/10614 10615 6/3649 14682 14704 22243 22246 22249 22252 22854 22855 22861 23637 23639 28890 28891 28913 28915 28916 29113 29115 29116 29118 29461 29463 29504 29506 30255 30340 30341 30343 30352 30354 37850 37861 37872 378842.0616683193919197e-20 6.185923063528282e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/833/193?format=asciiInfraredX-raydefaultJ/ApJ/833/193/table1MYStIX fields summaryFieldRegion namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNp[5/180] Total number of MYStIX Candidate Protostar (MCP) for this regionmeta.numberintIR[2/112] Number of MIRES sources that satisfy the infrared color constraint (1)meta.numberint4E[1/57] Number of MIRES sources that satisfy the [4.5] excess constraint (1)meta.numberintX[3/80] Subsample found from X-ray emission (1)meta.numberintCloud[5/142] Number of candidates associated with dense cores and filamentsmeta.numberintMPCM[4/77] Number of candidates previously listed in our MPCM catalog (Broos+ 2013, J/ApJS/209/32)meta.numberintKnown[0/67] Number of candidates previously identified by other researchersmeta.numberintRegAbbreviated region name as used in protostar candidate designations in tables 2 and 3; column added by CDSmeta.idcharSimbadSimbad column added by the CDSmeta.ref.urlchar_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/ApJ/833/193/table2MYStIX candidate protostarsSimbadNameSimbad column added by the CDSmeta.idcharRegRegion identifiermeta.id.parentcharl_PsrcLimit flag on Psrcmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMCP[1/180] MYStIX Candidate Protostar number within Regmeta.id;meta.mainintMYStIXMYStIX catalog designation (1)meta.idcharRAJ2000Right Ascension in decimal degrees (J2000) (2)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (2)degpos.eq.dec;meta.mainfMPCM[NY] MYStIX Probable Complex Member catalog flag (3)meta.codecharfMCPMCP selection flag (4)meta.codecharfHer[NY] Herschel SPIRE 500um coincidence flag (5)meta.codecharSubClSub cluster identifier (6)meta.code.multipcharME[1/6.4]? Median energy of the net counts in keV (7)keVem.energyfloatnullableCts[-0.2/966]? Net counts, extracted photons minus local background (7)ctphot.count;em.X-rayfloatnullablePsrc[0/0.03]? Probability of source non-existence (7)stat.fit.goodnessfloatnullablel_PvarLimit flag on Pvarmeta.code.errorcharPvar[0.0001/0.1]? Probability of constant X-ray count rate during Chandra exposure(s) (7)stat.fit.goodnessfloatnullable[3.6][6/18.2]? Spitzer/IRAC 3.6um magnitude from Kuhn+ (2013, J/ApJS/209/29)magphot.mag;em.IR.3-4umfloatnullable[4.5][4.4/17.1]? Spitzer/IRAC 4.5um magnitude from Kuhn+ (2013, J/ApJS/209/29)magphot.mag;em.IR.4-8umfloatnullable[5.8][2.3/15.4]? Spitzer/IRAC 5.8um magnitude from Kuhn+ (2013, J/ApJS/209/29)magphot.flux.density;em.IR.4-8umfloatnullable[8.0][1.5/14.8]? Spitzer/IRAC 8.0um magnitude from Kuhn+ (2013, J/ApJS/209/29)magphot.flux.density;em.IR.8-15umfloatnullableT3[Y/ ] Notes on individual source in Table 3?meta.codecharMCatDisplay data from the MYStIX catalogs (Kuhn+, 2013, ApjS, 209, 27-32) within 0.5"meta.ref.urlintnullableJ/ApJ/833/193/table3Notes on individual MYStIX candidate protostarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegRegion identifiermeta.id.parentcharMCP[1/177] MYStIX Candidate Protostar number within Regmeta.id;meta.mainintNotesNotes on individual objectsmeta.notechar