Show simple item record

dc.contributor.authorBeltran, M.T.
dc.contributor.authorOlmi, L.
dc.contributor.authorCesaroni, R.
dc.contributor.authorSchisano, E.
dc.contributor.authorElia, D.
dc.contributor.authorMolinari, S.
dc.contributor.authorDi Giorgio, A. M.
dc.contributor.authorKirk, J.M.
dc.contributor.authorMottram, J.C.
dc.contributor.authorPestalozzi, M.
dc.contributor.authorTesti, L.
dc.contributor.authorThompson, M.A.
dc.date.accessioned2013-07-29T10:18:28Z
dc.date.available2013-07-29T10:18:28Z
dc.date.issued2013-04
dc.identifier.citationBeltran , M T , Olmi , L , Cesaroni , R , Schisano , E , Elia , D , Molinari , S , Di Giorgio , A M , Kirk , J M , Mottram , J C , Pestalozzi , M , Testi , L & Thompson , M A 2013 , ' A Hi-GAL study of the high-mass star-forming region G29.96-0.02 ' , Astronomy and Astrophysics , vol. 552 , A123 . https://doi.org/10.1051/0004-6361/201321086
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 1909282
dc.identifier.otherPURE UUID: 1da4d1e4-9456-4519-9f25-46f1a3809f0e
dc.identifier.otherBibtex: urn:d63a0333ac965f7c58074a2d541afa10
dc.identifier.otherScopus: 84876220509
dc.identifier.urihttp://hdl.handle.net/2299/11201
dc.descriptionOriginal article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory
dc.description.abstractContext. G29.96-0.02 is a high-mass star-forming cloud observed at 70, 160, 250, 350, and 500 $m as part of the Herschel survey of the Galactic plane (Hi-GAL) during the science demonstration phase. Aims: We wish to conduct a far-infrared study of the sources associated with this star-forming region by estimating their physical properties and evolutionary stage, and investigating the clump mass function, the star formation efficiency and rate in the cloud. Methods: We have identified the Hi-GAL sources associated with the cloud, searched for possible counterparts at centimeter and infrared wavelengths, fitted their spectral energy distribution and estimated their physical parameters. Results: A total of 198 sources have been detected in all 5 Hi-GAL bands, 117 of which are associated with 24 $m emission and 87 of which are not associated with 24 $m emission. We called the former sources 24 $m-bright and the latter ones 24 $m-dark. The [70-160] color of the 24 $m-dark sources is smaller than that of the 24 $m-bright ones. The 24 $m-dark sources have lower L$_bol$ and L$_bol$/M$_env$ than the 24 $m-bright ones for similar M$_env$, which suggests that they are in an earlier evolutionary phase. The G29-SFR cloud is associated with 10 NVSS sources and with extended centimeter continuum emission well correlated with the 70 $m emission. Most of the NVSS sources appear to be early B or late O-type stars. The most massive and luminous Hi-GAL sources in the cloud are located close to the G29-UC region, which suggests that there is a privileged area for massive star formation toward the center of the G29-SFR cloud. Almost all the Hi-GAL sources have masses well above the Jeans mass but only 5% have masses above the virial mass, which indicates that most of the sources are stable against gravitational collapse. The sources with M$_env$ gt M$_virial$ and that should be undergoing collapse and forming stars are preferentially located at lsim4' of the G29-UC region, which is the most luminous source in the cloud. The overall SFE of the G29-SFR cloud ranges from 0.7 to 5 and the SFR ranges from 0.001 to 0.008 M$_?$ yr$^-1$, consistent with the values estimated for Galactic Hii regions. The mass spectrum of the sources with masses above 300 M$_?$, well above the completeness limit, can be well-fitted with a power law of slope $ = 2.15 plusmn 0.30, consistent with the values obtained for the whole l = 30deg, associated with high-mass star formation, and l = 59deg, associated with low- to intermediate-mass star formation, Hi-GAL SDP fields. Tables 1-3 are available in electronic form at http://www.aanda.orgen
dc.format.extent21
dc.language.isoeng
dc.relation.ispartofAstronomy and Astrophysics
dc.rightsOpen
dc.subjectISM: individual objects: G29.96-0.02, HII regions, stars: formation
dc.titleA Hi-GAL study of the high-mass star-forming region G29.96-0.02en
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2013-04
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201321086
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record