Astrochemical Properties of Planck Cold Clumps

	Astrochemical Properties of Planck Cold Clumps
	Tatematsu, Ken'ichi 1,2; Liu, Tie 3; Ohashi, Satoshi 4; Sanhueza, Patricio 1; Quang Nguyen Luong 1,3; Hirota, Tomoya 1,2; Liu, Sheng-Yuan 5; Hirano, Naomi 5; Choi, Minho 3; Kang, Miju 3
刊名	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2017-02-01
卷号	228 期号:2
关键词	ISM: clouds ISM: molecules ISM: structure stars: formation
英文摘要	We observed 13 Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The N2H+ distribution obtained with the Nobeyama telescope is quite similar to SCUBA-2 dust distribution. The 82 GHz HC3N, 82 GHz CCS, and 94 GHz CCS emission are often distributed differently with respect to the N2H+ emission. The CCS emission, which is known to be abundant in starless molecular cloud cores, is often very clumpy in the observed targets. We made deep single-pointing observations in DNC, (HNC)-C-13, N2D+, and cyclic-C3H2 toward nine clumps. The detection rate of N2D+ is 50%. Furthermore, we observed the NH3 emission toward 15 Planck cold clumps to estimate the kinetic temperature, and confirmed that most targets are cold (less than or similar to 20 K). In two of the starless clumps we observed, the CCS emission is distributed as it surrounds the N2H+ core (chemically evolved gas), which resembles the case of L1544, a prestellar core showing collapse. In addition, we detected both DNC and N2D+. These two clumps are most likely on the verge of star formation. We introduce the chemical evolution factor (CEF) for starless cores to describe the chemical evolutionary stage, and analyze the observed Planck cold clumps.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MOLECULAR CLOUD CORES ; STAR-FORMING REGIONS ; INFRARED DARK CLOUDS ; 45-M RADIO TELESCOPE ; DENSE CORES ; DEUTERIUM FRACTIONATION ; CHEMICAL VARIATION ; MAPPING OBSERVATIONS ; PHYSICAL CONDITIONS ; ANGULAR-MOMENTUM
收录类别	SCI
语种	英语
WOS记录号	WOS:000397312100002
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8245]
专题	国家天文台_射电天文研究部
作者单位	1.Natl Astron Observ Japan, Natl Inst Nat Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 2.SOKENDAI Grad Univ Adv Studies, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 3.Korea Astron & Space Sci Inst, Daedeokdaero 776, Daejeon, South Korea 4.Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan 5.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS NTU 1,Sect 4,Roosvelt Rd, Taipei 10617, Taiwan 6.Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England 7.Univ Manchester, Jodrell Bank Ctr Astrophys, Sch Phys & Astron, Oxford Rd, Manchester M13 9PL, Lancs, England 8.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 9.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 10.NRC, Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada
推荐引用方式 GB/T 7714	Tatematsu, Ken'ichi,Liu, Tie,Ohashi, Satoshi,et al. Astrochemical Properties of Planck Cold Clumps[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2017,228(2).
APA	Tatematsu, Ken'ichi.,Liu, Tie.,Ohashi, Satoshi.,Sanhueza, Patricio.,Quang Nguyen Luong.,...&TRAO Key Science Program TOP Colla.(2017).Astrochemical Properties of Planck Cold Clumps.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,228(2).
MLA	Tatematsu, Ken'ichi,et al."Astrochemical Properties of Planck Cold Clumps".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 228.2(2017).