J/A+A/620/A24ivo://CDS.VizieR/J/A+A/620/A24doi:10.26093/cds/vizier.36200024CDSHasenberger B.Lombardi M.Alves J.Forbrich J.Hacar A.Lada C.J.2018-11-28T08:38:34Z2018-11-23T09:19:47ZCDS support team

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

cds-question@unistra.frinterstellar-mediummolecular-cloudsextinctionMulti-wavelength observations in the sub-mm regime provide information on the distribution of both the dust column density and the effective dust temperature in molecular clouds. In this study, we created high-resolution and high-dynamic-range maps of the Pipe nebula region and explored the value of dust-temperature measurements in particular towards the dense cores embedded in the cloud. The maps are based on data from the Herschel and Planck satellites, and calibrated with a near-infrared extinction map based on 2MASS observations. We have considered a sample of previously defined cores and found that the majority of core regions contain at least one local temperature minimum. Moreover, we observed an anti-correlation between column density and temperature. The slope of this anti-correlation is dependent on the region boundaries and can be used as a metric to distinguish dense from diffuse areas in the cloud if systematic effects are addressed appropriately. Employing dust-temperature data thus allows us to draw conclusions on the thermodynamically dominant processes in this sample of cores: external heating by the interstellar radiation field and shielding by the surrounding medium. In addition, we have taken a first step towards a physically motivated core definition by recognising that the column-density-temperature anti-correlation is sensitive to the core boundaries. Dust-temperature maps therefore clearly contain valuable information about the physical state of the observed medium.2018A&A...620A..24Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A24CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/566/A45 : Orion optical-depth & column-density maps (Lombardi+, 2014)J/A+A/587/A106 : Perseus dust optical depth & column density maps (Zari+, 2016)J/A+A/606/A100 : YSOs in California Molecular Cloud (Lada+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/620/A24https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/620/A24http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/620/A24https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/620/A24https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/620/A24http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/620/A24GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/620/A24/list (Description of FITS file)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/620/A24/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/620/A24/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/620/A24/list?GETtext/xml+votable180.050000true261.5954316-26.13697990.0055555555555555566/29200https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/620/A24?format=asciidefaultJ/A+A/620/A24/listDescription of FITS filerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latscaleScale of the imagearcsec/pixinstr.scaleintNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNzNumber of images (1)meta.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTextTitle 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.ranullableindexed_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.decnullableindexed