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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

Chung, E. J., Lee, C. W., Kim, S., Kim, G., Caselli, P., Tafalla, M., et al. (2019). 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. The Astrophysical Journal, 877(2): 114. doi:10.3847/1538-4357/ab12d1.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-D891-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-D894-2
Genre: Journal Article

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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.pdf (Any fulltext), 4MB
 
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 Creators:
Chung, Eun Jung, Author
Lee, Chang Won, Author
Kim, Shinyoung, Author
Kim, Gwanjeong, Author
Caselli, Paola1, Author              
Tafalla, Mario, Author
Myers, Philip C., Author
Soam, Archana, Author
Liu, Tie, Author
Gopinathan, Maheswar, Author
Kim, Miryang, Author
Kim, Kyoung Hee, Author
Kwon, Woojin, Author
Kang, Hyunwoo, Author
Lee, Changhoon, Author
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1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: "TRAO FUNS" is a project to survey the Gould Belt's clouds in molecular lines. This paper presents its first results on the 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 C18O(1-0) , mainly tracing low-density clouds, and a ~460 square arcminute area using N2H+(1-0), mainly tracing dense cores. CS (2-1) and SO(32-21 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 N2H+ 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 N2H+. A comparison of nonthermal velocity dispersions derived from using C18O and N2H+ 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.

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 Dates: 2019-05-31
 Publication Status: Published online
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 Identifiers: DOI: 10.3847/1538-4357/ab12d1
Other: LOCALID: 3072936
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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol, England : IOP Publishing LTD
Pages: - Volume / Issue: 877 (2) Sequence Number: 114 Start / End Page: - Identifier: ISSN: 1538-4357
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3