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The First Hi-GAL Observations of the Outer Galaxy: A Look at Star Formation in the Third Galactic Quadrant in the Longitude Range 216.°5 <~ l <~ 225.°5

dc.contributor.authorELIA, D.
hal.structure.identifierIstituto di Fisica dello Spazio Interplanetario [IFSI]
dc.contributor.authorMOLINARI, S.
dc.contributor.authorFUKUI, Y.
dc.contributor.authorSCHISANO, E.
hal.structure.identifierAntarctic Research a European Network for Astrophysics [ARENA]
dc.contributor.authorOLMI, L.
dc.contributor.authorVENEZIANI, M.
dc.contributor.authorHAYAKAWA, T.
dc.contributor.authorPESTALOZZI, M.
hal.structure.identifierFORMATION STELLAIRE 2013
dc.contributor.authorSCHNEIDER, N.
hal.structure.identifierInstitut de Planétologie et d'Astrophysique de Grenoble [IPAG ]
dc.contributor.authorBENEDETTINI, M.
hal.structure.identifierforeign laboratories [FL]
dc.contributor.authorDI GIORGIO, A. M.
dc.contributor.authorIKHENAODE, D.
dc.contributor.authorMIZUNO, A.
dc.contributor.authorONISHI, T.
hal.structure.identifierIstituto di Fisica dello Spazio Interplanetario [IFSI]
dc.contributor.authorPEZZUTO, S.
dc.contributor.authorPIAZZO, L.
dc.contributor.authorPOLYCHRONI, D.
dc.contributor.authorRYGL, K. L. J.
dc.contributor.authorYAMAMOTO, H.
dc.contributor.authorMARUCCIA, Y.
dc.date.created2013-04-27
dc.date.issued2013
dc.identifier.issn0004-637X
dc.description.abstractEnWe present the first Herschel PACS and SPIRE photometric observations in a portion of the outer Galaxy ($216.5^{\circ} \lesssim \ell \lesssim 225.5^{\circ}$ and $-2^{\circ} \lesssim b \lesssim 0^{\circ}$) as a part of the Hi-GAL survey. The maps between 70 and 500 $\mu$m, the derived column density and temperature maps, and the compact source catalog are presented. NANTEN CO(1-0) line observations are used to derive cloud kinematics and distances, so that we can estimate distance-dependent physical parameters of the compact sources (cores and clumps) having a reliable spectral energy distribution, that we separate in 255 proto-stellar and 688 starless. Both typologies are found in association with all the distance components observed in the field, up to $\sim 5.8$ kpc, testifying the presence of star formation beyond the Perseus arm at these longitudes. Selecting the starless gravitationally bound sources we identify 590 pre-stellar candidates. Several sources of both proto- and pre-stellar nature are found to exceed the minimum requirement for being compatible with massive star formation, based on the mass-radius relation. For the pre-stellar sources belonging to the Local arm ($d\lesssim1.5$ kpc) we study the mass function, whose high-mass end shows a power-law $N(\log M) \propto M^{-1.0 \pm 0.2}$. Finally, we use a luminosity vs mass diagram to infer the evolutionary status of the sources, finding that most of the proto-stellar are in the early accretion phase (with some cases compatible with a Class I stage), while for pre-stellar sources, in general, accretion has not started yet.
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.subject.enGalaxy: structure
dc.subject.eninfrared: ISM
dc.subject.enISM: clouds
dc.subject.enISM: molecules
dc.subject.enstars: formation
dc.title.enThe First Hi-GAL Observations of the Outer Galaxy: A Look at Star Formation in the Third Galactic Quadrant in the Longitude Range 216.°5 <~ l <~ 225.°5
dc.typeArticle de revue
dc.identifier.doi10.1088/0004-637X/772/1/45
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR]
dc.identifier.arxiv1304.7358
bordeaux.journalThe Astrophysical Journal
bordeaux.pageid. 45
bordeaux.volume772
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00868022
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00868022v1
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