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A particular carbon-chain-producing region: L1489 starless core
Wu, Yuefang1; Lin, Lianghao1,2,3,4; Liu, Xunchuan1; Chen, Xi5,6; Liu, Tie7,8; Zhang, Chao1,9; Ju, Binggang3,4; Yuan, Jinghua10; Wang, Junzhi5; Shen, Zhiqiang5; Kim, Kee-Tae7; Qin, Sheng-Li9; Li, Juan5; Liu, Hongli11,12; Zhang, Tianwei1; Xu, Ye3,4; Liu, Qinghui5
2019-07-17
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN1432-0746
Volume627Pages:12
Corresponding AuthorWu, Yuefang(ywu@pku.edu.cn)
AbstractWe detected carbon-chain molecules (CCMs) HC2n+1 N (n = 1-3) and C3S in K-u band as well as high-energy excitation lines including C4H N = 9-8, J = 17/2-15/2, 19/2-17/2, and CH3CCH J = 5-4, K = 2 in the 3 mm band toward a starless core called the eastern molecular core (EMC) of L1489 IRS. Maps of all the observed lines were also obtained. Comparisons with a number of early starless cores and the warm carbon-chain chemistry (WCCC) source L1527 show that the column densities of C4H and CH3CCH are close to those of L1527, and the CH3CCH column densities of the EMC and L1527 are slightly higher than those of TMC-1. The EMC and L1527 have similar C3S column densities, but they are much lower than those of all the starless cores, with only 6.5 and 10% of the TMC-1 value, respectively. The emissions of the N-bearing species of the EMC and L1527 are at the medium level of the starless cores. These comparisons show that the CCM emissions in the EMC are similar to those of L1527, though L1527 contains a protostar. Although dark and quiescent, the EMC is warmer and at a later evolutionary stage than classical carbon-chain-producing regions in the cold, dark, quiescent early phase. The PACS, SPIRE, and SCUBA maps evidently show that the L1489 IRS seems to be the heating source of the EMC. Although it is located at the margins of the EMC, its bolometric luminosity and bolometric temperature are relatively high. Above all, the EMC is a rather particular carbon-chain-producing region and is quite significant for CCM science.
KeywordISM: molecules ISM: abundances stars: formation ISM: jets and outflows
DOI10.1051/0004-6361/201834184
WOS KeywordMOLECULAR LINE OBSERVATIONS ; DENSE CORES ; DARK CLOUDS ; INTERSTELLAR MOLECULE ; INTERNAL STRUCTURE ; CHEMISTRY ; NH3 ; TEMPERATURE ; ENVELOPE ; OUTFLOWS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000475839300002
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27096
Collection中国科学院紫金山天文台
Corresponding AuthorWu, Yuefang
Affiliation1.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, 96 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, 8 Yuanhua Rd, Nanjing 210034, Jiangsu, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, 8 Yuanhua Rd, Nanjing 210034, Jiangsu, Peoples R China
5.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
6.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China
7.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea
8.East Asian Observ, 660 North Aohoku Pl, Hilo, HI 96720 USA
9.Yunnan Univ, Dept Astron, Kunming 650091, Yunnan, Peoples R China
10.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100101, Peoples R China
11.Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
12.Univ Concepcion, Dept Astron, Av Esteban Iturra S-N,160-C, Concepcion, Chile
Recommended Citation
GB/T 7714
Wu, Yuefang,Lin, Lianghao,Liu, Xunchuan,et al. A particular carbon-chain-producing region: L1489 starless core[J]. ASTRONOMY & ASTROPHYSICS,2019,627:12.
APA Wu, Yuefang.,Lin, Lianghao.,Liu, Xunchuan.,Chen, Xi.,Liu, Tie.,...&Liu, Qinghui.(2019).A particular carbon-chain-producing region: L1489 starless core.ASTRONOMY & ASTROPHYSICS,627,12.
MLA Wu, Yuefang,et al."A particular carbon-chain-producing region: L1489 starless core".ASTRONOMY & ASTROPHYSICS 627(2019):12.
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