J/ApJ/801/L26ivo://CDS.VizieR/J/ApJ/801/L26doi:10.26093/cds/vizier.18019026CDSYusef-Zadeh F.Roberts D.A.Wardle M.Cotton W.Schodel R.,Royster M.J.2018-01-03T05:34:18Z2017-09-18T13:05:37ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyradio-sourcesstellar-distanceWe present radio images within 30" of Sgr A* based on recent VLA observations at 34 GHz with 7.8 {mu}Jy sensitivity and resolution of ~88x46 mas. We report 44 partially resolved compact sources clustered in two regions in the E arm of ionized gas that orbits Sgr A*. These sources have size scales ranging between ~50 and 200 mas (400-1600 AUs), and a bow-shock appearance facing the direction of Sgr A*. Unlike the bow-shock sources previously identified in the near-IR but associated with massive stars, these 34 GHz sources do not appear to have near-IR counterparts at 3.8 {mu}m. We interpret these sources as a candidate population of photoevaporative protoplanetary disks (proplyds) that are associated with newly formed low mass stars with mass loss rates ~10^-7^-10^-6^ M_{sun}_/yr and are located at the edge of a molecular cloud outlined by ionized gas. The disks are externally illuminated by strong Lyman continuum radiation from the ~100 OB and WR massive stars distributed within 10" of Sgr A*. The presence of proplyds implies current in situ star formation activity near Sgr A* and opens a window for the first time to study low mass star, planetary, and brown dwarf formations near a supermassive black hole. The video abstract was created from a WorldWide Telescope tour file, which is available for download. Viewing the file requires a Windows PC with the WorldWide Telescope desktop client available at worldwidetelescope.org.2015ApJ...801L..26Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/801/L26CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/699/186 : VLA observations of the Galactic center (Zhao+, 2009)J/A+A/511/A18 : NIR observations of stars near SgrA* (Schoedel+, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/801/L26https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/801/L26http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/801/L26https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/801/L26https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/801/L26http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/801/L26GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/801/L26/table1 (The Parameters of Gaussian Fitted 34 GHz Sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/801/L26/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/801/L26/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/801/L26/table1?GETtext/xml+votable180.050000true266.4206475-29.007746750.0055555555555555566/288302.2528636539047234e-23 2.2528636539047234e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/801/L26?format=asciiRadiodefaultJ/ApJ/801/L26/table1The Parameters of Gaussian Fitted 34 GHz SourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDDetected radio source identifier ([YRW2015] PNN in Simbad)meta.id;spect.dopplerVeloc.radio;em.radiocharn_ID[a] Note on ID (1)meta.notecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainDistDistance from Sgr A*arcsecpos.angDistancefloateposPositional accuracymasstat.error;posfloattheta-aSemi-major axismasphys.angSize;srcinttheta-bSemi-minor axismasphys.angSize;srcintPAPosition angledegpos.posAngintPIntPeak intensitymJy/beamphot.flux.density;em.mm.30-50GHzfloate_PIntUncertainty in PIntmJy/beamstat.errorfloatSintIntegrated flux at 34 GHzmJyphot.flux.density;em.mm.30-50GHzfloate_SintUncertainty in SintmJystat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlchar