Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/23753
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Schneider, N. | en_US |
dc.contributor.author | Bontemps, S. | en_US |
dc.contributor.author | Girichidis, P. | en_US |
dc.contributor.author | Rayner, T. | en_US |
dc.contributor.author | Motte, F. | en_US |
dc.contributor.author | André, P. | en_US |
dc.contributor.author | Russeil, D. | en_US |
dc.contributor.author | Abergel, A. | en_US |
dc.contributor.author | Anderson, L. | en_US |
dc.contributor.author | Arzoumanian, D. | en_US |
dc.contributor.author | BENEDETTINI, Milena | en_US |
dc.contributor.author | Csengeri, T. | en_US |
dc.contributor.author | Didelon, P. | en_US |
dc.contributor.author | di, Francesco J. | en_US |
dc.contributor.author | Griffin, M. | en_US |
dc.contributor.author | Hill, T. | en_US |
dc.contributor.author | Klessen, R. S. | en_US |
dc.contributor.author | Ossenkopf, V. | en_US |
dc.contributor.author | PEZZUTO, Stefano | en_US |
dc.contributor.author | Rivera-Ingraham, A. | en_US |
dc.contributor.author | SPINOGLIO, Luigi Giuseppe Maria | en_US |
dc.contributor.author | Tremblin, P. | en_US |
dc.contributor.author | Zavagno, A. | en_US |
dc.date.accessioned | 2020-03-31T10:54:08Z | - |
dc.date.available | 2020-03-31T10:54:08Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/23753 | - |
dc.description.abstract | We report the novel detection of complex high column density tails in the probability distribution functions (PDFs) for three high-mass star-forming regions (CepOB3, MonR2, NGC 6334), obtained from dust emission observed with Herschel. The low column density range can be fitted with a lognormal distribution. A first power-law tail starts above an extinction (AV) of ̃6-14. It has a slope of α 1.3-2 for the &ρ ≈ r-α profile for an equivalent density distribution (spherical or cylindrical geometry), and is thus consistent with free-fall gravitational collapse. Above AV ̃40, 60, and 140, we detect an excess that can be fitted by a flatter power-law tail with α > 2. It correlates with the central regions of the cloud (ridges/hubs) of size ̃;1 pc and densities above 104 cm-3. This excess may be caused by physical processes that slow down collapse and reduce the flow of mass towards higher densities. Possible are: (1) rotation, which introduces an angular momentum barrier, (2) increasing optical depth and weaker cooling, (3) magnetic fields, (4) geometrical effects, and (5) protostellar feedback. The excess/second power-law tail is closely linked to high-mass star-formation though it does not imply a universal column density threshold for the formation of (high-mass) stars. | en_US |
dc.language.iso | eng | en_US |
dc.title | Detection of two power-law tails in the probability distribution functions of massive GMCs | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnrasl/slv101 | en_US |
dc.identifier.scopus | 2-s2.0-84941285925 | en_US |
dc.identifier.isi | 000361300300009 | en_US |
dc.identifier.url | https://academic.oup.com/mnrasl/article/453/1/L41/983239 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 453 | en_US |
dc.relation.firstpage | L41 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015MNRAS.453L..41S | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.orcid | 0000-0002-3597-7263 | - |
crisitem.author.orcid | 0000-0001-7852-1971 | - |
crisitem.author.orcid | 0000-0001-8840-1551 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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