dc.contributor.author | Beltran, M.T. | |
dc.contributor.author | Olmi, L. | |
dc.contributor.author | Cesaroni, R. | |
dc.contributor.author | Schisano, E. | |
dc.contributor.author | Elia, D. | |
dc.contributor.author | Molinari, S. | |
dc.contributor.author | Di Giorgio, A. M. | |
dc.contributor.author | Kirk, J.M. | |
dc.contributor.author | Mottram, J.C. | |
dc.contributor.author | Pestalozzi, M. | |
dc.contributor.author | Testi, L. | |
dc.contributor.author | Thompson, M.A. | |
dc.date.accessioned | 2013-07-29T10:18:28Z | |
dc.date.available | 2013-07-29T10:18:28Z | |
dc.date.issued | 2013-04 | |
dc.identifier.citation | Beltran , 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.issn | 0004-6361 | |
dc.identifier.other | Bibtex: urn:d63a0333ac965f7c58074a2d541afa10 | |
dc.identifier.other | ORCID: /0000-0001-5392-909X/work/30970790 | |
dc.identifier.uri | http://hdl.handle.net/2299/11201 | |
dc.description | Original article can be found at: http://www.aanda.org/ Copyright The European Southern Observatory | |
dc.description.abstract | Context. 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.org | en |
dc.format.extent | 21 | |
dc.format.extent | 808060 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy and Astrophysics | |
dc.subject | ISM: individual objects: G29.96-0.02, HII regions, stars: formation | |
dc.title | A Hi-GAL study of the high-mass star-forming region G29.96-0.02 | en |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/201321086 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |