Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/24795
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | MOLINARI, Sergio | en_US |
dc.contributor.author | Merello, M. | en_US |
dc.contributor.author | ELIA, Davide Quintino | en_US |
dc.contributor.author | CESARONI, Riccardo | en_US |
dc.contributor.author | TESTI, Leonardo | en_US |
dc.contributor.author | Robitaille, T. | en_US |
dc.date.accessioned | 2020-05-13T12:53:10Z | - |
dc.date.available | 2020-05-13T12:53:10Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24795 | - |
dc.description.abstract | The evolutionary classification of massive clumps that are candidate progenitors of high-mass young stars and clusters relies on a variety of independent diagnostics based on observables from the near-infrared to the radio. A promising evolutionary indicator for massive and dense cluster-progenitor clumps is the L/M ratio between the bolometric luminosity and the mass of the clumps. With the aim of providing a quantitative calibration for this indicator, we used SEPIA/APEX to obtain CH<SUB>3</SUB>C<SUB>2</SUB>H(J = 12-11) observations, which is an excellent thermometer molecule probing densities ≥slant {10}<SUP>5</SUP> cm<SUP>-3</SUP>, toward 51 dense clumps with M≥slant 1000 M {}<SUB>☉ </SUB> and uniformly spanning -2 ≲ Log(L/M) [L {}<SUB>☉ </SUB>/M {}<SUB>☉ </SUB>] ≲ 2.3. We identify three distinct ranges of L/M that can be associated to three distinct phases of star formation in massive clumps. For L/M ≤slant 1 no clump is detected in CH<SUB>3</SUB>C<SUB>2</SUB>H, suggesting an inner envelope temperature below ∼30K. For 1 ≲ L/M ≲ 10 we detect 58% of the clumps with a temperature between ∼30 and ∼35 K independently from the exact value of L/M; such clumps are building up luminosity due to the formation of stars, but no star is yet able to significantly heat the inner clump regions. For L/M ≳ 10 we detect all the clumps with a gas temperature rising with Log(L/M), marking the appearance of a qualitatively different heating source within the clumps; such values are found toward clumps with UCH II counterparts, suggesting that the quantitative difference in T versus L/M behavior above L/M ∼ 10 is due to the first appearance of ZAMS stars in the clumps. | en_US |
dc.language.iso | eng | en_US |
dc.title | Calibration of Evolutionary Diagnostics in High-mass Star Formation | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/2041-8205/826/1/L8 | en_US |
dc.identifier.scopus | 2-s2.0-84979284949 | en_US |
dc.identifier.isi | 000380739300008 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/2041-8205/826/1/L8 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 826 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L8 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016ApJ...826L...8M | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare 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 | O.A. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-9826-7525 | - |
crisitem.author.orcid | 0000-0002-9120-5890 | - |
crisitem.author.orcid | 0000-0002-2430-5103 | - |
crisitem.author.orcid | 0000-0003-1859-3070 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
Molinari_2016_ApJL_826_L8.pdf | PDF editoriale | 573.69 kB | Adobe PDF | Visualizza/apri |
Page view(s)
44
controllato il 2-mag-2024
Download(s)
18
controllato il 2-mag-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.