J/A+A/576/A109ivo://CDS.VizieR/J/A+A/576/A109doi:10.26093/cds/vizier.35760109CDSYildiz U.A.Kristensen L.E.van Dishoeck E.F.Hogerheijde M.R.,Karska A.Belloche A.Endo A.Frieswijk W.Gusten R.van Kempen T.A.,Leurini S.Nagy Z.Perez-Beaupuits J.P.Risacher C.van der Marel N.,van Weeren R.J.Wyrowski F.2015-08-10T12:56:48Z2015-04-10T08:44:04ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsco-line-emissionDuring the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Both processes reflect the accretion onto the forming star and affect subsequent collapse or fragmentation of the cloud. Our aim is to quantify the feedback, mechanical and radiative, for a large sample of low-mass sources in a consistent manner. The outflow activity is compared to radiative feedback in the form of UV heating by the accreting protostar to search for correlations and evolutionary trends. Large-scale maps of 26 young stellar objects, which are part of the Herschel WISH key program are obtained using the CHAMP+ instrument on the Atacama Pathfinder EXperiment (^12^CO and ^13^CO 6-5; E_up_~100K), and the HARP-B instrument on the James Clerk Maxwell Telescope (^12^CO and ^13^CO 3-2; E_up_~30K). The maps have high spatial resolution, particularly the CO 6-5 maps taken with a 9" beam, resolving the morphology of the outflows. The maps are used to determine outflow parameters and the results are compared with higher-J CO lines obtained with Herschel. Envelope models are used to quantify the amount of UV-heated gas and its temperature from ^13^CO 6-5 observations. All sources in our sample show outflow activity, with the spatial extent decreasing from the Class 0 to the Class I stage. Consistent with previous studies, the outflow force, F_CO_, is larger for Class 0 sources than for Class I sources, even if their luminosities are comparable. The outflowing gas typically extends to much greater distances than the power-law envelope and therefore influences the surrounding cloud material directly. Comparison of the CO 6-5 results with HIFI H2O and PACS high-J CO lines, both tracing currently shocked gas, shows that the two components are linked, even though the transitions do not probe the same gas. The link does not extend down to CO 3-2. The conclusion is that CO 6-5 depends on the shock characteristics (density and velocity), whereas CO 3-2 is more sensitive to conditions in the surrounding environment (density). The radiative feedback is responsible for increasing the gas temperature by a factor of two, up to 30-50K, on scales of a few thousand AU, particularly along the direction of the outflow. The mass of the UV heated gas exceeds the mass contained in the entrained outflow in the inner ~3000AU and is therefore at least as important on small scales.2015A&A...576A.109Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/576/A109CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/576/A109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/576/A109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/576/A109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/576/A109https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/576/A109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/576/A109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/576/A109/list (List of FITS and GILDAS datacubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/576/A109/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/576/A109/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/576/A109/list?GETtext/xml+votable180.050000true294.253757.5693330.0055555555555555566/859 862 1052 1054 1154 15965 23549 29653 30366 30519 30733 32083 36956 37819 41132 42738 42981 42992 43010https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/576/A109?format=asciiRadiodefaultJ/A+A/576/A109/listList of FITS and GILDAS datacubesfitsDownload the FITS filemeta.ref.urlcharSNameSimbad name of the sourcemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension of centre (J2000)pos.eq.ra;meta.mainDEJ2000Declination of centre (J2000)pos.eq.dec;meta.mainScale[4.5/9.31] Scale of the imagearcsec/pixinstr.scalefloatNx[17/99] Number of pixels along X-axismeta.numberintNy[16/137] Number of pixels along Y-axismeta.numberintNz[110/4000] Number of frequenciesmeta.numberintV.min[-549/-19] Lower value of velocity intervalkm/sinstr.bandwidthfloatV.max[30/396] Upper value of velocity intervalkm/sinstr.bandwidthfloatdV[200/664] Velocity resolutionm/sspect.resolutionintsize[0.5/143] Size of the FITS fileMibytephys.size;meta.fitsfloatgildasDownload the observation in Gildas formatmeta.ref.urlcharFileNameName of the FITS file in subdirectory fitsmeta.id;meta.fitscharGNameName of the GILDAS file in subdirectory gildasmeta.id;meta.filechar