ATOMS : ALMA Three-millimeter Observations of Massive Star-forming regions - IX. A pilot study towards IRDC G034.43+00.24 on multi-scale structures and gas kinematics

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dc.contributor.author Liu, Hong-Li
dc.contributor.author Tej, Anandmayee
dc.contributor.author Liu, Tie
dc.contributor.author Goldsmith, Paul F.
dc.contributor.author Stutz, Amelia
dc.contributor.author Juvela, Mika
dc.contributor.author Qin, Sheng-Li
dc.contributor.author Xu, Feng-Wei
dc.contributor.author Bronfman, Leonardo
dc.contributor.author Evans, Neal J.
dc.contributor.author Saha, Anindya
dc.contributor.author Issac, Namitha
dc.contributor.author Tatematsu, Ken'ichi
dc.contributor.author Wang, Ke
dc.contributor.author Li, Shanghuo
dc.contributor.author Zhang, Siju
dc.contributor.author Baug, Tapas
dc.contributor.author Dewangan, Lokesh
dc.contributor.author Wu, Yue-Fang
dc.contributor.author Zhang, Yong
dc.contributor.author Lee, Chang Won
dc.contributor.author Liu, Xun-Chuan
dc.contributor.author Zhou, Jianwen
dc.contributor.author Soam, Archana
dc.date.accessioned 2023-01-04T14:59:01Z
dc.date.available 2023-01-04T14:59:01Z
dc.date.issued 2022-02-25
dc.identifier.citation Liu , H-L , Tej , A , Liu , T , Goldsmith , P F , Stutz , A , Juvela , M , Qin , S-L , Xu , F-W , Bronfman , L , Evans , N J , Saha , A , Issac , N , Tatematsu , K , Wang , K , Li , S , Zhang , S , Baug , T , Dewangan , L , Wu , Y-F , Zhang , Y , Lee , C W , Liu , X-C , Zhou , J & Soam , A 2022 , ' ATOMS : ALMA Three-millimeter Observations of Massive Star-forming regions - IX. A pilot study towards IRDC G034.43+00.24 on multi-scale structures and gas kinematics ' , Monthly Notices of the Royal Astronomical Society , vol. 511 , no. 3 , pp. 4480-4489 . https://doi.org/10.1093/mnras/stac378
dc.identifier.other PURE: 175572765
dc.identifier.other PURE UUID: 5812a071-3624-4062-bf70-c6472ecfa182
dc.identifier.other WOS: 000760980800009
dc.identifier.other ORCID: /0000-0002-5809-4834/work/110389321
dc.identifier.uri http://hdl.handle.net/10138/352551
dc.description.abstract We present a comprehensive study of the gas kinematics associated with density structures at different spatial scales in the filamentary infrared dark cloud, G034.43+00.24 (G34). This study makes use of the (HCO+)-C-13 (1-0) molecular line data from the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) survey, which has spatial and velocity resolution of similar to 0.04 pc and 0.2 km s(-1), respectively. Several tens of dendrogram structures have been extracted in the position-position-velocity space of (HCO+)-C-13, which include 21 small-scale leaves and 20 larger-scale branches. Overall, their gas motions are supersonic but they exhibit the interesting behaviour where leaves tend to be less dynamically supersonic than the branches. For the larger scale, branch structures, the observed velocity-size relation (i.e. velocity variation/dispersion versus size) are seen to follow the Larson scaling exponent while the smaller-scale, leaf structures show a systematic deviation and display a steeper slope. We argue that the origin of the observed kinematics of the branch structures is likely to be a combination of turbulence and gravity-driven ordered gas flows. In comparison, gravity-driven chaotic gas motion is likely at the level of small-scale leaf structures. The results presented in our previous paper and this current follow-up study suggest that the main driving mechanism for mass accretion/inflow observed in G34 varies at different spatial scales. We therefore conclude that a scale-dependent combined effect of turbulence and gravity is essential to explain the star-formation processes in G34. en
dc.format.extent 10
dc.language.iso eng
dc.relation.ispartof Monthly Notices of the Royal Astronomical Society
dc.rights unspecified
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject stars: formation
dc.subject ISM: clouds
dc.subject ISM: individual objects: G034.43+00.24
dc.subject ISM: kinematics and dynamics
dc.subject MOLECULAR CLOUDS
dc.subject DENSE GAS
dc.subject TURBULENCE
dc.subject FRAGMENTATION
dc.subject CLUMPS
dc.subject 114 Physical sciences
dc.title ATOMS : ALMA Three-millimeter Observations of Massive Star-forming regions - IX. A pilot study towards IRDC G034.43+00.24 on multi-scale structures and gas kinematics en
dc.type Article
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1093/mnras/stac378
dc.relation.issn 0035-8711
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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