Yun, Hyeong-Sik, Lee, Jeong-Eun, Evans, Neal J., II, Offner, Stella S. R., Heyer, Mark H., Cho, Jungyeon, Gaches, Brandt A. L., Yang, Yao-Lun ORCID: 0000-0001-8227-2816, Chen, How-Huan ORCID: 0000-0001-6222-1712, Choi, Yunhee, Lee, Yong-Hee, Baek, Giseon, Choi, Minho, Kim, Jongsoo, Kang, Hyunwoo, Lee, Seokho and Tatematsu, Ken'ichi (2021). Turbulent Properties in Star-forming Molecular Clouds Down to the Sonic Scale. II. Investigating the Relation between Turbulence and Star-forming Environments in Molecular Clouds. Astrophys. J., 921 (1). BRISTOL: IOP Publishing Ltd. ISSN 1538-4357

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Abstract

We investigate the effect of star formation on turbulence in the Orion A and Ophiuchus clouds using principal component analysis (PCA). We measure the properties of turbulence by applying PCA on the spectral maps in (CO)-C-13, (CO)-O-18, HCO+ J = 1-0, and CS J = 2-1. First, the scaling relations derived from PCA of the (CO)-C-13 maps show that the velocity difference (delta v) for a given spatial scale (L) is the highest in the integral-shaped filament (ISF) and L1688, where the most active star formation occurs in the two clouds. The delta v increases with the number density and total bolometric luminosity of the protostars in the subregions. Second, in the ISF and L1688 regions, the delta v of (CO)-O-18, HCO+, and CS are generally higher than that of (CO)-C-13, which implies that the dense gas is more turbulent than the diffuse gas in the star-forming regions; stars form in dense gas, and dynamical activities associated with star formation, such as jets and outflows, can provide energy into the surrounding gas to enhance turbulent motions.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Yun, Hyeong-SikUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, Jeong-EunUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Evans, Neal J., IIUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Offner, Stella S. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heyer, Mark H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cho, JungyeonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gaches, Brandt A. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yang, Yao-LunUNSPECIFIEDorcid.org/0000-0001-8227-2816UNSPECIFIED
Chen, How-HuanUNSPECIFIEDorcid.org/0000-0001-6222-1712UNSPECIFIED
Choi, YunheeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, Yong-HeeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baek, GiseonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Choi, MinhoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kim, JongsooUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kang, HyunwooUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, SeokhoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tatematsu, Ken'ichiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-601039
DOI: 10.3847/1538-4357/ac193e
Journal or Publication Title: Astrophys. J.
Volume: 921
Number: 1
Date: 2021
Publisher: IOP Publishing Ltd
Place of Publication: BRISTOL
ISSN: 1538-4357
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
PRINCIPAL COMPONENT ANALYSIS; INTERSTELLAR TURBULENCE; DENSE CORES; RHO OPHIUCHI; ORION; SPECTRA; REGIONS; NUMBER; FLOWS; MASSMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/60103

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