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http://hdl.handle.net/20.500.12386/28926
Campo DC | Valore | Lingua |
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dc.contributor.author | Gómez-Ruiz, A. I. | en_US |
dc.contributor.author | Gusdorf, A. | en_US |
dc.contributor.author | Leurini, Silvia | en_US |
dc.contributor.author | Menten, K. M. | en_US |
dc.contributor.author | Takahashi, S. | en_US |
dc.contributor.author | Wyrowski, F. | en_US |
dc.contributor.author | Güsten, R. | en_US |
dc.date.accessioned | 2020-12-17T12:16:27Z | - |
dc.date.available | 2020-12-17T12:16:27Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28926 | - |
dc.description.abstract | Context. OMC-2/3 is one of the nearest embedded cluster-forming regions that includes intermediate-mass protostars at early stages of evolution. A previous CO (3-2) mapping survey towards this region revealed outflow activity related to sources at different evolutionary phases. <BR /> Aims: The present work presents a study of the warm gas in the high-velocity emission from several outflows found in CO (3-2) emission by previous observations, determines their physical conditions, and makes a comparison with previous results in low-mass star-forming regions. <BR /> Methods: We used the CHAMP+ heterodyne array on the APEX telescope to map the CO (6-5) and CO (7-6) emission in the OMC-2 FIR 6 and OMC-3 MMS 1-6 regions, and to observe <SUP>13</SUP>CO (6-5) at selected positions. We analyzed these data together with previous CO (3-2) observations. In addition, we mapped the SiO (5-4) emission in OMC-2 FIR 6. <BR /> Results: The CO (6-5) emission was detected in most of the outflow lobes in the mapped regions, while the CO (7-6) was found mostly in the OMC-3 outflows. In the OMC-3 MMS 5 outflow, a previously undetected extremely high-velocity gas was found in CO (6-5). This extremely high-velocity emission arises from the regions close to the central object MMS 5. Radiative transfer models revealed that the high-velocity gas from MMS 5 outflow consists of gas with n<SUB>H<SUB>2</SUB></SUB> = 10<SUP>4</SUP>-10<SUP>5</SUP> cm<SUP>-3</SUP> and T > 200 K, similar to what is observed in young Class 0 low-mass protostars. For the other outflows, values of n<SUB>H<SUB>2</SUB></SUB> > 10<SUP>4</SUP> cm<SUP>-3</SUP> were found. <BR /> Conclusions: The physical conditions and kinematic properties of the young intermediate-mass outflows presented here are similar to those found in outflows from Class 0 low-mass objects. Due to their excitation requirements, mid - J CO lines are good tracers of extremely high-velocity gas in young outflows likely related to jets. <P />Based on observations acquired with the Atacama Pathfinder Experiment (APEX). APEX is a collaboration between the Max-Planck-Institut für Radioastronomie, the European Southern Observatory, and the Onsala Space Observatory. | en_US |
dc.language.iso | eng | en_US |
dc.title | Warm gas in protostellar outflows. II. Extremely high-velocity emission jet and outflows from OMC-2/3 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201424156 | en_US |
dc.identifier.scopus | 2-s2.0-85088580861 | en_US |
dc.identifier.isi | 000485214400002 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2019/09/aa24156-14/aa24156-14.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 629 | en_US |
dc.relation.firstpage | A77 | 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 | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2019A&A...629A..77G | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | 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 | O.A. Cagliari | - |
crisitem.author.orcid | 0000-0003-1014-3390 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
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