J/ApJ/749/47ivo://CDS.VizieR/J/ApJ/749/47doi:10.26093/cds/vizier.17490047CDSLi J.J.Moscadelli L.Cesaroni R.Furuya R.S.Xu Y.Usuda T.,Menten K.M.Pestalozzi M.Elia D.Schisano E.2017-12-22T05:32:43Z2013-12-09T08:15:07ZCDS support team

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

cds-question@unistra.frinterstellar-mediumastrophysical-masersradio-astronomyradio-continuum-emissioninterferometryWe used the Very Long Baseline Array and the European VLBI Network to perform phase-referenced very long baseline interferometry observations of the three most powerful maser transitions associated with the high-mass star-forming region G28.87+0.07: the 22.2GHz H_2_O, 6.7GHz CH_3_OH, and 1.665GHz OH lines. We also performed Very Large Array (VLA) observations of the radio continuum emission at 1.3 and 3.6cm and Subaru observations of the continuum emission at 24.5{mu}m. Two centimeter-continuum sources are detected and one of them (named hot molecular core (HMC)) is compact and placed at the center of the observed distribution of H_2_O, CH_3_OH, and OH masers. The bipolar distribution of line-of-sight velocities and the pattern of the proper motions suggest that the water masers are driven by a (proto)stellar jet interacting with the dense circumstellar gas. The same jet could both excite the centimeter-continuum source named HMC (interpreted as free-free emission from shocked gas) and power the molecular outflow observed at larger scales--although one cannot exclude that the free-free continuum is rather originating from a hypercompact H II region. At 24.5{mu}m, we identify two objects separated along the north-south direction, whose absolute positions agree with those of the two VLA continuum sources. We establish that ~90% of the luminosity of the region (~2x10^5^L_{sun}_) is coming from the radio source HMC, which confirms the existence of an embedded massive young stellar object exciting the masers and possibly still undergoing heavy accretion from the surrounding envelope.2012ApJ...749...47Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/749/47CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/416/1764 : H_2_O Southern Galactic Plane Survey (HOPS) (Walsh+, 2011)J/MNRAS/418/1689 : Red MSX water maser and ammonia emissions (Urquhart+, 2011)J/ApJS/154/553 : Inner galaxy massive star formation regions (Sewilo+, 2004)J/ApJ/566/945 : Massive star forming regions at 1.2mm (Beuther+, 2002)J/A+A/368/845 : Arcetri updates of H2O maser sources. (Valdettaro+, 2001)J/A+AS/137/43 : OH/H2O masers database (Forster+, 1999)J/ApJ/463/205 : CS and NH3 Survey of H2O Maser Emission (Anglada+ 1996)J/A+AS/101/153 : Galactic H2O masers (Palagi+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/749/47https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/749/47http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/749/47https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/749/47https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/749/47http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/749/47GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/749/47/table3 (Parameters of VLBA 22.2GHz H_2_O maser features in G28.87+0.07)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/749/47/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/749/47/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/749/47/table3?GETtext/xml+votable180.050000true280.9426214-3.59161560.0055555555555555566/302581.470987495161277e-23 1.470987495161277e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/749/47?format=asciiRadiodefaultJ/ApJ/749/47/table3Parameters of VLBA 22.2GHz H_2_O maser features in G28.87+0.07recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNum[0/168] Feature numbermeta.idintEpoch[ ,1-4] Epoch(s) of detection (1)time.epochcharVLSR[93.3/112] Local Standard of Rest velocity (2)km/sphys.veloc;pos.lsrfloatSnu[0.1/54]? The VLBA 22.2 GHz flux density (3)Jyphot.flux.density;em.radio.12-30GHzfloatnullableoRAPosition offset along Right Ascension (4)maspos.eq.ra;arith.difffloate_oRA[0.05/0.07]? Uncertainty in oRAmasstat.errorfloatnullableoDEPosition offset along Declination (4)maspos.eq.dec;arith.diffdoublee_oDE[0.05/0.2]? Uncertainty in oDEmasstat.errorfloatnullableVRA[-51/56]? Velocity component along Right Ascension (5)km/sphys.veloc;arith.difffloatnullablee_VRA[1/4.5]? Uncertainty in VRAkm/sstat.errorfloatnullableVDE[-27/22]? Velocity component along Declination (5)km/sphys.veloc;arith.difffloatnullablee_VDE? Uncertainty in VDEkm/sstat.errorfloatnullable_RASimbad column added by the CDSdegpos.eq.ra;meta.main_DESimbad column added by the CDSdegpos.eq.dec;meta.main