Multi-scale analysis of the Monoceros OB 1 star-forming region II. Colliding filaments in the Monoceros OB1 molecular cloud
文献类型:期刊论文
作者 | Montillaud, Julien1; Juvela, Mika2; Vastel, Charlotte3; He JH(何金华)4,5,6; Liu, Tie7,8,9; Ristorcelli, Isabelle3; Eden, David J.10; Kang, Sung-ju8; Kim, Kee-Tae8,11; Koch, Patrick M.12 |
刊名 | ASTRONOMY & ASTROPHYSICS |
出版日期 | 2019-10-11 |
卷号 | 631页码:21 |
ISSN号 | 0004-6361 |
关键词 | ISM: clouds stars: formation |
DOI | 10.1051/0004-6361/201834903 |
产权排序 | 第4完成单位 |
文献子类 | Article |
英文摘要 | Context. We started a multi-scale analysis of star formation in G202.3+2.5, an intertwined filamentary sub-region of the Monoceros OB1 molecular complex, in order to provide observational constraints on current theories and models that attempt to explain star formation globally. In the first paper (Paper I), we examined the distributions of dense cores and protostars and found enhanced star formation activity in the junction region of the filaments. Aims. In this second paper, we aim to unveil the connections between the core and filament evolutions, and between the filament dynamics and the global evolution of the cloud. Methods. We characterise the gas dynamics and energy balance in different parts of G202.3+2.5 using infrared observations from the Herschel and WISE telescopes and molecular tracers observed with the IRAM 30-m and TRAO 14-m telescopes. The velocity field of the cloud is examined and velocity-coherent structures are identified, characterised, and put in perspective with the cloud environment. Results. Two main velocity components are revealed, well separated in radial velocities in the north and merged around the location of intense N2H+ emission in the centre of G202.3+2.5 where Paper I found the peak of star formation activity. We show that the relative position of the two components along the sightline, and the velocity gradient of the N2H+ emission imply that the components have been undergoing collision for similar to 10(5) yr, although it remains unclear whether the gas moves mainly along or across the filament axes. The dense gas where N2H+ is detected is interpreted as the compressed region between the two filaments, which corresponds to a high mass inflow rate of similar to 1 x 10(-3) M-circle dot yr(-1) and possibly leads to a significant increase in its star formation efficiency. We identify a protostellar source in the junction region that possibly powers two crossed intermittent outflows. We show that the HII region around the nearby cluster NCG 2264 is still expanding and its role in the collision is examined. However, we cannot rule out the idea that the collision arises mostly from the global collapse of the cloud. Conclusions. The (sub-)filament-scale observables examined in this paper reveal a collision between G202.3+2.5 sub-structures and its probable role in feeding the cores in the junction region. To shed more light on this link between core and filament evolutions, one must characterise the cloud morphology, its fragmentation, and magnetic field, all at high resolution. We consider the role of the environment in this paper, but a larger-scale study of this region is now necessary to investigate the scenario of a global cloud collapse. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
WOS关键词 | HERBIG-HARO FLOWS ; M QUIET CLUMPS ; MAGNETIC-FIELDS ; MASS ; DUST ; EMISSION ; LINE ; GAS ; PROTOCLUSTERS ; POLARIMETRY |
资助项目 | INSU/CNRS (France) ; MPG (Germany) ; IGN (Spain) ; "Soutien a la recherche de l'observatoire" by the OSU THETA ; Programme "National Physique et Chimie du Milieu Interstellaire" (PCMI) of CNRS/INSU ; INC/INP - CEA ; INC/INP - CNES ; French ministry of foreign affairs (French embassy in Budapest)[40470VL/2017-2.2.5-TeT-FR-2017-00027] ; Hungarian national office for research and innovation (NKFIH)[40470VL/2017-2.2.5-TeT-FR-2017-00027] ; European Union's Horizon 2020 research and innovation programme[730 562] ; National Science Foundation ; National Geographic Society ; Sloan Foundation ; Samuel Oschin Foundation ; Eastman Kodak Corporation ; Academy of Finland[285769] ; Spanish MINECO[AyA2014-55216] ; NSF of China[11873086] ; NSF of China[U1631237] ; Yunnan province[2017HC018] ; Chinese Academy of Sciences (CAS) ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology[NRF-2019R1A2C1010851] ; NAOJ ALMA Scientific Research[2016-03B] ; National Key Research and Development Program of China[2017YFA0402702] ; National Science Foundation of China[11973013] ; National Science Foundation of China[11721303] ; Kavli Institute for Astronomy and Astrophysics, Peking University[7101502016] ; Ministry of Education and Science of the Republic of Kazakhstan[BR05236454] ; Nazarbayev University[FCDRG110119FD4503] ; [113-16] |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | EDP SCIENCES S A |
WOS记录号 | WOS:000498940300001 |
资助机构 | INSU/CNRS (France) ; MPG (Germany) ; IGN (Spain) ; "Soutien a la recherche de l'observatoire" by the OSU THETA ; Programme "National Physique et Chimie du Milieu Interstellaire" (PCMI) of CNRS/INSU ; INC/INP - CEA ; INC/INP - CNES ; French ministry of foreign affairs (French embassy in Budapest)[40470VL/2017-2.2.5-TeT-FR-2017-00027] ; Hungarian national office for research and innovation (NKFIH)[40470VL/2017-2.2.5-TeT-FR-2017-00027] ; European Union's Horizon 2020 research and innovation programme[730 562] ; National Science Foundation ; National Geographic Society ; Sloan Foundation ; Samuel Oschin Foundation ; Eastman Kodak Corporation ; Academy of Finland[285769] ; Spanish MINECO[AyA2014-55216] ; NSF of China[11873086, U1631237] ; Yunnan province[2017HC018] ; Chinese Academy of Sciences (CAS) ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology[NRF-2019R1A2C1010851] ; NAOJ ALMA Scientific Research[2016-03B] ; National Key Research and Development Program of China[2017YFA0402702] ; National Science Foundation of China[11973013, 11721303] ; Kavli Institute for Astronomy and Astrophysics, Peking University[7101502016] ; Ministry of Education and Science of the Republic of Kazakhstan[BR05236454] ; Nazarbayev University[FCDRG110119FD4503] ; [113-16] |
源URL | [http://ir.ynao.ac.cn/handle/114a53/21839] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Montillaud, Julien |
作者单位 | 1.Institut UTINAM – UMR 6213 – CNRS – University of Bourgogne Franche Comté, France, OSU THETA, 41bis avenue de l’Observatoire, 25000 Besançon, France 2.Department of Physics, University of Helsinki, PO Box 64, 00014, Finland 3.IRAP, Université de Toulouse, CNRS, UPS, CNES, 31400 Toulouse, France 4.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu, Kunming, 650216, PR China 5.Chinese Academy of Sciences, South America Center for Astrophysics (CASSACA), Camino El Observatorio 1515, Las Condes, Santiago, Chile 6.Departamento de Astronomía, Universidad de Chile, Las Condes, Santiago, Chile 7.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, PR China 8.Korea Astronomy and Space Science Institute, 776 Daedeokdaero, Yuseong-gu, Daejeon 34055, Republic of Korea 9.East Asian Observatory, 660 N. A’ohoku Place, Hilo, HI 96720, USA 10.Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK |
推荐引用方式 GB/T 7714 | Montillaud, Julien,Juvela, Mika,Vastel, Charlotte,et al. Multi-scale analysis of the Monoceros OB 1 star-forming region II. Colliding filaments in the Monoceros OB1 molecular cloud[J]. ASTRONOMY & ASTROPHYSICS,2019,631:21. |
APA | Montillaud, Julien.,Juvela, Mika.,Vastel, Charlotte.,He JH.,Liu, Tie.,...&Wang, Ke.(2019).Multi-scale analysis of the Monoceros OB 1 star-forming region II. Colliding filaments in the Monoceros OB1 molecular cloud.ASTRONOMY & ASTROPHYSICS,631,21. |
MLA | Montillaud, Julien,et al."Multi-scale analysis of the Monoceros OB 1 star-forming region II. Colliding filaments in the Monoceros OB1 molecular cloud".ASTRONOMY & ASTROPHYSICS 631(2019):21. |
入库方式: OAI收割
来源:云南天文台
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