Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27663
DC Field | Value | Language |
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dc.contributor.author | Ahmadi, A. | en_US |
dc.contributor.author | Beuther, H. | en_US |
dc.contributor.author | Mottram, J. C. | en_US |
dc.contributor.author | Bosco, F. | en_US |
dc.contributor.author | Linz, H. | en_US |
dc.contributor.author | Henning, Th. | en_US |
dc.contributor.author | Winters, J. M. | en_US |
dc.contributor.author | Kuiper, R. | en_US |
dc.contributor.author | Pudritz, R. | en_US |
dc.contributor.author | Sánchez-Monge, Á. | en_US |
dc.contributor.author | Keto, E. | en_US |
dc.contributor.author | BELTRAN SOROLLA, MARIA TERESA | en_US |
dc.contributor.author | Bontemps, S. | en_US |
dc.contributor.author | CESARONI, Riccardo | en_US |
dc.contributor.author | Csengeri, T. | en_US |
dc.contributor.author | Feng, S. | en_US |
dc.contributor.author | Galvan-Madrid, R. | en_US |
dc.contributor.author | Johnston, K. G. | en_US |
dc.contributor.author | Klaassen, P. | en_US |
dc.contributor.author | Leurini, Silvia | en_US |
dc.contributor.author | Longmore, S. N. | en_US |
dc.contributor.author | Lumsden, S. | en_US |
dc.contributor.author | Maud, L. T. | en_US |
dc.contributor.author | Menten, K. M. | en_US |
dc.contributor.author | MOSCADELLI, Luca | en_US |
dc.contributor.author | Motte, F. | en_US |
dc.contributor.author | Palau, A. | en_US |
dc.contributor.author | Peters, T. | en_US |
dc.contributor.author | Ragan, S. E. | en_US |
dc.contributor.author | Schilke, P. | en_US |
dc.contributor.author | Urquhart, J. S. | en_US |
dc.contributor.author | Wyrowski, F. | en_US |
dc.contributor.author | Zinnecker, H. | en_US |
dc.date.accessioned | 2020-10-07T14:39:14Z | - |
dc.date.available | 2020-10-07T14:39:14Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27663 | - |
dc.description.abstract | Context. The fragmentation mode of high-mass molecular clumps and the properties of the central rotating structures surrounding the most luminous objects have yet to be comprehensively characterised. <BR /> Aims: We study the fragmentation and kinematics of the high-mass star-forming region W3(H<SUB>2</SUB>O), as part of the IRAM NOrthern Extended Millimeter Array (NOEMA) large programme CORE. <BR /> Methods: Using the IRAM NOEMA and the IRAM 30 m telescope, the CORE survey has obtained high-resolution observations of 20 well-known highly luminous star-forming regions in the 1.37 mm wavelength regime in both line and dust continuum emission. <BR /> Results: We present the spectral line setup of the CORE survey and a case study for W3(H<SUB>2</SUB>O). At 0.''35 (700 AU at 2.0 kpc) resolution, the W3(H<SUB>2</SUB>O) clump fragments into two cores (west and east), separated by 2300 AU. Velocity shifts of a few km s<SUP>-1</SUP> are observed in the dense-gas tracer, CH<SUB>3</SUB>CN, across both cores, consistent with rotation and perpendicular to the directions of two bipolar outflows, one emanating from each core. The kinematics of the rotating structure about W3(H<SUB>2</SUB>O) W shows signs of differential rotation of material, possibly in a disk-like object. The observed rotational signature around W3(H<SUB>2</SUB>O) E may be due to a disk-like object, an unresolved binary (or multiple) system, or a combination of both. We fit the emission of CH<SUB>3</SUB>CN (12<SUB>K</SUB>-11<SUB>K</SUB>), K = 4-6 and derive a gas temperature map with a median temperature of 165 K across W3(H<SUB>2</SUB>O). We create a Toomre Q map to study thestability of the rotating structures against gravitational instability. The rotating structures appear to be Toomre unstable close to their outer boundaries, with a possibility of further fragmentation in the differentially rotating core, W3(H<SUB>2</SUB>O) W. Rapid cooling in the Toomre unstable regions supports the fragmentation scenario. <BR /> Conclusions: Combining millimetre dust continuum and spectral line data toward the famous high-mass star-forming region W3(H<SUB>2</SUB>O), we identify core fragmentation on large scales, and indications for possible disk fragmentation on smaller spatial scales. <P />Based on observations from an IRAM large program. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain).Observational data are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/618/A46">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/618/A46</A>, or alternatively at <A href="http://www.mpia.de/core">http://www.mpia.de/core</A>. | en_US |
dc.language.iso | eng | en_US |
dc.title | Core fragmentation and Toomre stability analysis of W3(H2O). A case study of the IRAM NOEMA large program CORE | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201732548 | en_US |
dc.identifier.scopus | 2-s2.0-85054091550 | en_US |
dc.identifier.isi | 000446951000003 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2018/10/aa32548-17/aa32548-17.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 618 | en_US |
dc.relation.firstpage | A46 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 33 | 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 | 2018A&A...618A..46A | 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::PE9_6 Stars and stellar systems | 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.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | O.A. Cagliari | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0003-3315-5626 | - |
crisitem.author.orcid | 0000-0002-2430-5103 | - |
crisitem.author.orcid | 0000-0003-1014-3390 | - |
crisitem.author.orcid | 0000-0002-8517-8881 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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ahmadi_2018_A+A_618_A46.pdf | PDF editoriale | 2.79 MB | Adobe PDF | View/Open |
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