J/A+A/710/A309ivo://CDS.VizieR/J/A+A/710/A309CDSRiquelme-Vasquez D.Guesten R.Morris M.R.Harris A.I.,Requena-Torres M.A.Morales E.F.E.Stutzki J.Simon R.Risacher C.,Higgins R.2026-06-29T14:54:50Z2026-06-29T15:54:24ZCDS support team

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

cds-question@unistra.frgalactic-centerinterstellar-mediumradio-sourcesSagittarius C (Sgr C) is a massive, relatively quiescent complex at the western edge of the Galaxy's Central Molecular Zone (CMZ). While the Sgr B2 region has been extensively studied, Sgr C has received comparatively less attention. We aim to characterize the kinematics and physical state of the gas in Sgr C using spatially and velocity-resolved [CII] 158 microns emission. This line traces the multi-phase interstellar medium, providing a crucial complement to molecular, infrared, and radio observations. We present a fully sampled 74x47 pc map of the [CII] line toward Sgr C, observed with SOFIA. The data feature a 0.55 pc spatial and 1km/s spectral resolution. These observations are analyzed in conjunction with ancillary maps of the CO(2-1) transition and its isotopologues from the APEX telescope. [CII] emission is widespread, showing a continuous structure extending from Sgr A to Sgr C with complex morphology. The bulk emission arises at negative radial velocities, consistent with Galactic rotation. The most prominent feature is the giant Sgr C HII region, where [CII] reveals an expanding, ring-like shell interpreted as a photo-dissociation region (PDR). Kinematic modelling yields an expansion velocity of 23km/s and a dynamical age of about 0.13Myr. Our analysis suggests that stellar winds from known massive stars are insufficient to power the observed expansion, pointing toward alternative drivers like a buried supernova. Finally, we find a striking spatial association between this shell and a non-thermal radio filament, indicating that the shell's expansion has triggered high-mass star formation at its edge.2026A&A...710A.309Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/710/A309CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/710/A309https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/710/A309http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/710/A309https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/710/A309https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/710/A309http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/710/A309GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/710/A309/list (List of fits datacubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/710/A309/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/710/A309/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/710/A309/list?GETtext/xml+votable180.050000true267.4682854-27.47862960.0055555555555555566/28874https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/710/A309?format=asciiRadiodefaultJ/A+A/710/A309/listList of fits datacubesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLONGalactic longitude of center (J2000)degpos.galactic.lonGLATGalactic latitude of center (J2000)degpos.galactic.latNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNzNumber of slicesmeta.numberintObs.dateObservation datestime.epoch;obsnullablebVELO-LSRVELO-LSR interval lower valuekm/sphys.velocintBVELO-LSRVELO-LSR interval upper valuekm/sphys.velocintdVELO-LSRVELO-LSR resolutionkm/spos.angResolutionintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar_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.raindexed_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.decindexed