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TRAO survey of nearby filamentary molecular clouds, the universal nursery of stars (TRAO FUNS). I. Dynamics and Chemistry of L1478 in the California molecular cloud

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dc.contributor.author Chung, E.J
dc.contributor.author Lee, C.W
dc.contributor.author Kim, S
dc.contributor.author Kim, G
dc.contributor.author Caselli, P
dc.contributor.author Tafalla, M
dc.contributor.author Myers, P.C
dc.contributor.author Archana, S
dc.contributor.author Liu, T
dc.contributor.author Maheswar, G
dc.contributor.author Kim, M
dc.contributor.author Kim, K.H
dc.contributor.author Kwon, W
dc.contributor.author Kang, H
dc.contributor.author Lee, C
dc.date.accessioned 2020-11-20T13:17:30Z
dc.date.available 2020-11-20T13:17:30Z
dc.date.issued 2019-06-01
dc.identifier.citation The Astrophysical Journal, Vol. 877, No. 2, 114 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7321
dc.description Restricted Access © The American Astronomical Society https://doi.org/10.3847/1538-4357/ab12d1 en_US
dc.description.abstract “TRAO FUNS” is a project to survey the Gould Belt’s clouds in molecular lines. This paper presents its first results onthe central region of the California molecular cloud, L1478. We performed on-the-fly mapping observations using the Taeduk Radio Astronomy Observatory 14 m single-dish telescope equipped with a 16 multibeam array covering a ∼1.0 square degree area of this region using C O1 0 (–) 18 , mainly tracing low-density clouds, and a ∼460 square arcminute area using + N2H 10 ( – ), mainly tracing dense cores. CS2 1 (–) and SO 3 2 ( –) 2 1 were also used simultaneously to map a ∼440 square arcminute area of this region. We identified 10 filaments by applying the dendrogram technique to the C18O data cube and 8 dense N H+ 2 cores using FELLWALKER. Basic physical properties of filaments such as mass, length, width, velocity field, and velocity dispersion are derived. It is found that L1478 consists of several filaments with slightly different velocities. Particularly, the filaments that are supercritical are found to contain dense cores detected in N H+ 2 . A comparison of nonthermal velocity dispersions derived from C18O and N H+ 2 for the filaments and dense cores indicates that some of the dense cores share kinematics similar to those of the surrounding filaments, while several dense cores have different kinematics from those of their filaments. This suggests that the formation mechanism of dense cores and filaments can be different in individual filaments depending on their morphologies and environments. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject ISM: clouds en_US
dc.subject ISM: kinematics and dynamics en_US
dc.subject ISM: structure en_US
dc.subject Stars: formation en_US
dc.title TRAO survey of nearby filamentary molecular clouds, the universal nursery of stars (TRAO FUNS). I. Dynamics and Chemistry of L1478 in the California molecular cloud en_US
dc.type Article en_US


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