J/AJ/162/68ivo://CDS.VizieR/J/AJ/162/68doi:10.26093/cds/vizier.51620068CDSOrtiz-Leon G.N.Plunkett A.L.Loinard L.Dzib S.A.,Rodriguez-Garza C.B.Pillai T.Gong Y.Brunthaler A.2023-10-06T10:38:59Z2023-01-23T12:17:18ZCDS support team

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

cds-question@unistra.frstar-forming-regionsradio-sourcesUsing the Karl G. Jansky Very Large Array (VLA), we have conducted a survey for 22 GHz, 6_1,6_-5_2,3_ H_2_O masers toward the Serpens South region. The masers were also observed with the Very Long Baseline Array following the VLA detections. We detect for the first time H_2_O masers in the Serpens South region that are found to be associated to three Class 0-Class I objects, including the two brightest protostars in the Serpens South cluster, known as CARMA-6 and CARMA-7. We also detect H_2_O masers associated to a source with no outflow or jet features. We suggest that this source is most probably a background asymptotic giant branch star projected in the direction of Serpens South. The spatial distribution of the emission spots suggest that the masers in the three Class 0-Class I objects emerge very close to the protostars and are likely excited in shocks driven by the interaction between a protostellar jet and the circumstellar material. Based on the comparison of the distributions of bolometric luminosity of sources hosting 22GHz H_2_O masers and 162 young stellar objects covered by our observations, we identify a limit of L_Bol_~=10L_{sun}_ for a source to host water masers. However, the maser emission shows strong variability in both intensity and velocity spread, and therefore masers associated to lower-luminosity sources may have been missed by our observations. We also report 11 new sources with radio continuum emission at 22GHz.2021AJ....162...68Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/162/68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/162/68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/162/68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/162/68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/162/68https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/162/68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/162/68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/162/68/table5 (Properties of the VLA Detected Radio Continuum Sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/162/68/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/162/68/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/162/68/table5?GETtext/xml+votable180.050000true277.2703333-1.50172220.0055555555555555566/30341 303431.4577353054677623e-23 1.4577353054677623e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/162/68?format=asciiRadiodefaultJ/AJ/162/68/table5Properties of the VLA Detected Radio Continuum SourcesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/17] Source IDmeta.id;meta.mainintEpochEpoch ID (all, 1, 2, 3, 4)meta.codecharRAJ2000? Right ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000? Declination (J2000)pos.eq.dec;meta.mainnullablel_PeakLimit flag on Peakmeta.code.errorcharPeakPeak flux density at 22GHzmJy/beamphot.flux.density;em.IRfloate_Peak? Peak flux density error at 22GHzmJy/beamstat.error;stat.maxfloatnullableInt? Integrated flux density at 22GHzmJyphot.flux.density;em.radio.12-30GHzfloatnullablee_Int? Integrated flux density error at 22GHzmJystat.errorfloatnullableNameKnown name(s)meta.idcharTypeObject Typesrc.classcharRefs[1/6]? Referencesmeta.ref;pos.frameintnullableNew[Y;H2O ] New radio detection? Y (yes) H2O (new maser)meta.codechar