Multi-scale analysis of the Monoceros OB 1 star-forming region : I. The dense core population

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Particle Physics and Astrophysics en
dc.contributor University of Helsinki, University of Cologne en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor.author Montillaud, Julien
dc.contributor.author Juvela, Mika
dc.contributor.author Vastel, Charlotte
dc.contributor.author He, JinHua
dc.contributor.author Liu, Tie
dc.contributor.author Ristorcelli, Isabelle
dc.contributor.author Eden, David
dc.contributor.author Kang, Sung-ju
dc.contributor.author Kim, Kee-Tae
dc.contributor.author Koch, Patrick M.
dc.contributor.author Lee, Chang Won
dc.contributor.author Rawlings, Mark G.
dc.contributor.author Saajasto, Mika
dc.contributor.author Sanhueza, Patricio
dc.contributor.author Soam, Archana
dc.contributor.author Zahorecz, Sarolta
dc.contributor.author Alina, Dana
dc.contributor.author Bogner, Rebeka
dc.contributor.author Cornu, David
dc.contributor.author Doi, Yasuo
dc.contributor.author Malinen, Johanna
dc.contributor.author Marshall, Douglas J.
dc.contributor.author Micelotta, Elisabetta R.
dc.contributor.author Pelkonen, V.-M.
dc.contributor.author Tóth, L. Viktor
dc.contributor.author Traficante, Alessio
dc.contributor.author Wang, Ke
dc.date.accessioned 2019-12-16T10:27:02Z
dc.date.available 2019-12-16T10:27:02Z
dc.date.issued 2019-10-11
dc.identifier.citation Montillaud , J , Juvela , M , Vastel , C , He , J , Liu , T , Ristorcelli , I , Eden , D , Kang , S , Kim , K-T , Koch , P M , Lee , C W , Rawlings , M G , Saajasto , M , Sanhueza , P , Soam , A , Zahorecz , S , Alina , D , Bogner , R , Cornu , D , Doi , Y , Malinen , J , Marshall , D J , Micelotta , E R , Pelkonen , V-M , Tóth , L V , Traficante , A & Wang , K 2019 , ' Multi-scale analysis of the Monoceros OB 1 star-forming region : I. The dense core population ' , Astronomy & Astrophysics , vol. 631 , no. L1 , 1 . https://doi.org/10.1051/0004-6361/201936377 en
dc.identifier.issn 0004-6361
dc.identifier.other PURE: 128807875
dc.identifier.other PURE UUID: 5d5f88eb-a56b-4677-9be7-c997c29325aa
dc.identifier.other WOS: 000499094100001
dc.identifier.other ORCID: /0000-0002-5809-4834/work/66365382
dc.identifier.other ORCID: /0000-0002-8898-1047/work/66366675
dc.identifier.other ORCID: /0000-0002-6555-5109/work/66367490
dc.identifier.other ORCID: /0000-0002-2701-2170/work/66368179
dc.identifier.uri http://hdl.handle.net/10138/308346
dc.description.abstract Context. Current theories and models attempt to explain star formation globally, from core scales to giant molecular cloud scales. A multi-scale observational characterisation of an entire molecular complex is necessary to constrain them. We investigate star formation in G202.3+2.5, a ̃10 × 3 pc sub-region of the Monoceros OB1 cloud with a complex morphology that harbours interconnected filamentary structures. Aims: We aim to connect the evolution of cores and filaments in G202.3+2.5 with the global evolution of the cloud and to identify the engines of the cloud dynamics. Methods: In this first paper, the star formation activity is evaluated by surveying the distributions of dense cores and protostars and their evolutionary state, as characterised using both infrared observations from the Herschel and WISE telescopes and molecular line observations with the IRAM 30 m telescope. Results: We find ongoing star formation in the whole cloud, with a local peak in star formation activity around the centre of G202.3+2.5, where a chain of massive cores (10 - 50 M☉) forms a massive ridge (≳150 M☉). All evolutionary stages from starless cores to Class II protostars are found in G202.3+2.5, including a possibly starless and massive (52 M☉) core, which presents a high column density (8 × 1022 cm-2). Conclusions: All the core-scale observables we examined point to an enhanced star formation activity that is centred on the junction between the three main branches of the ramified structure of G202.3+2.5. This suggests that the increased star formation activity results from the convergence of these branches. To further investigate the origin of this enhancement, it is now necessary to extend the analysis to larger scales in order to examine the relationship between cores, filaments, and their environment. We address these points through the analysis of the dynamics of G202.3+2.5 in a joint paper. fi
dc.format.extent 20
dc.language.iso eng
dc.relation.ispartof Astronomy & Astrophysics
dc.relation.uri https://arxiv.org/pdf/1909.03781
dc.rights en
dc.subject 115 Astronomy, Space science en
dc.subject stars: formation en
dc.subject ISM: clouds en
dc.subject dust, extinction en
dc.title Multi-scale analysis of the Monoceros OB 1 star-forming region : I. The dense core population en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1051/0004-6361/201936377
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl
dc.contributor.pbl

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