J/ApJS/248/24ivo://CDS.VizieR/J/ApJS/248/24doi:10.26093/cds/vizier.22480024CDSGinsburg A.Anderson L.D.Dicker S.Romero C.Svoboda B.Devlin M.,Galvan-Madrid R.Indebetouw R.Liu H.B.Mason B.Mroczkowski T.,Armentrout W.P.Bally J.Brogan C.Butterfield N.Hunter T.R.,Reese E.D.Rosolowsky E.Sarazin C.Shirley Y.Sievers J.,Stanchfield S.2021-11-09T11:53:09Z2020-08-11T11:59:10ZCDS support team

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

cds-question@unistra.frsurveysgalaxy-planesmilky-way-galaxymillimeter-astronomysubmillimeter-astronomyh-ii-regionsWe report the results of a pilot program for a Green Bank Telescope MUSTANG-2 Galactic Plane survey at 3mm (90GHz), MGPS90. The survey achieves a typical 1{sigma} depth of 1-2mJy/beam with a 9" beam. We describe the survey parameters, quality assessment process, cataloging, and comparison with other data sets. We have identified 709 sources over seven observed fields selecting some of the most prominent millimeter-bright regions between 0{deg}<l<50{deg} (total area ~7.5deg^2^). The majority of these sources have counterparts at other wavelengths. By applying flux selection criteria to these sources, we successfully recovered several known hypercompact HII (HCHII) regions but did not confirm any new ones. We identify 126 sources that have mm-wavelength counterparts but do not have cm-wavelength counterparts and are therefore candidate HCHII regions; of these, 10 are morphologically compact and are strong candidates for new HCHII regions. Given the limited number of candidates in the extended area in this survey compared to the relatively large numbers seen in protoclusters W51 and W49, it appears that most HCHII regions exist within dense protoclusters. Comparing the counts of HCHII to ultracompact HII (UCHII) regions, we infer the HCHII region lifetime is 16%-46% that of the UCHII region lifetime. We additionally separated the 3mm emission into dust and free-free emission by comparing with archival 870{mu}m and 20cm data. In the selected pilot fields, most (>~80%) of the 3mm emission comes from plasma, either through free-free or synchrotron emission.2020ApJS..248...24Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/248/24CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/291/943 : Protostellar cores (Ossenkopf+, 1994)J/ApJS/155/421 : Survey of Galactic Center region at 20cm (Yusef-Zadeh+, 2004)J/AJ/129/348 : Radio compact HII regions in the Milky Way (Giveon+, 2005)J/AJ/130/156 : Galactic radio compact HII regions at 1.4GHz (Giveon+, 2005)J/AJ/131/2525 : MAGPIS 20cm survey (Helfand+, 2006)J/ApJ/721/137 : The Bolocam Galactic Plane Survey (BGPS) (Bally+, 2010)J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010)J/ApJS/208/14 : BGPS. IX. Data release 2. (Ginsburg+, 2013)J/ApJS/208/11 : Red MSX Source Survey: massive protostars (Lumsden+, 2013)J/A+A/565/A75 : ATLASGAL: dust condensations in Gal. plane (Csengeri+, 2014)J/MNRAS/443/3388 : IPHAS new extended PNe release 1 (Sabin+, 2014)J/MNRAS/443/1555 : ATLASGAL massive star forming clumps (Urquhart+, 2014)J/AJ/149/64 : MIPSGAL 24{mu}m point source catalog (Gutermuth+, 2015)J/A+A/595/A27 : JVLA images of W51A (Ginsburg+, 2016)J/A+A/586/A50 : Central Molecular Zone H2CO temp. maps (Ginsburg+, 2016)J/A+A/591/A149 : Hi-GAL. inner Milky Way: +68>=l>=70 (Molinari+, 2016)J/MNRAS/469/2163 : JCMT Plane Survey. first complete data release (Eden+, 2017)J/MNRAS/471/100 : Hi-GAL compact source catalog. -71.0<l<67.0 (Elia+, 2017)J/A+A/615/A103 : CORNISH project. III. UCHII region catalog (Kalcheva+, 2018)J/A+A/627/A175 : GLOSTAR. Radio Source Catalogue I (Medina+ 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/248/24https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/248/24http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/248/24https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/248/24https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/248/24http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/248/24GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/248/24/tableb1 (MUSTANG-2 source IDs and photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/248/24/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/248/24/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/248/24/tableb1?GETtext/xml+votable180.050000true281.54763-2.694380.0055555555555555565/7275 6/28828 28830-28831 29112 30259 30262-30263 30268-30269 30315 30318-30319 30605 30607 30616 30618 30692 30694-30695https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/248/24?format=asciiMillimeterdefaultJ/ApJS/248/24/tableb1MUSTANG-2 source IDs and photometryRejectRejected sources (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[0/342] Identifiermeta.id;meta.mainintS-D[0.004/17.1] Dendrogram contour-integrated intensityJyphot.flux.density;em.mm.50-100GHzfloatGLONDendrogram moment-1 Galactic longitudedegpos.galactic.lonGLAT[-0.53/0.51] Dendrogram moment-1 Galactic latitudedegpos.galactic.latS10[0.003/3.7] MUSTANG aperture flux within a 10" apertureJyphot.flux.density;em.mm.50-100GHzfloatS15[0.006/7] MUSTANG aperture flux within a 15" apertureJyphot.flux.density;em.mm.50-100GHzfloatSbg[-0.02/2.3]? Median background intensity in 15"-20" annulusJy/beamphot.flux.density;em.mm.50-100GHzfloatnullableA-G[0.002/6]? Gaussian fit amplitudeJy/beamsrc.var.amplitudefloatnullableGLON-G? Gaussian fit Galactic longitudedegpos.galactic.lonnullableGLAT-G? Gaussian fit Galactic latitudedegpos.galactic.latfloatnullableFWHM-maj[6.8/27]? Gaussian fit FWHM along the major axisarcsecphys.angSize;meta.modelledfloatnullableFWHM-min[6.7/27]? Gaussian fit FWHM along the minor axisarcsecphys.angSize;meta.modelledfloatnullablePA-G[0/360]? Gaussian fit position angledegpos.posAng;meta.modelledfloatnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed