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High-mass Starless Clumps in the Inner Galactic Plane: The Sample and Dust Properties
文献类型：期刊论文
| 作者 | Yuan, Jinghua1 ; Wu, Yuefang2; Ellingsen, Simon P.3; Evans, Neal J., II4,5; Henkel, Christian6,7; Wang, Ke8; Liu, Hong-Li1; Liu, Tie5; Li, Jin-Zeng1; Zavagno, Annie9
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| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
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| 出版日期 | 2017-07-01 |
| 卷号 | 231期号:1 |
| 关键词 | infrared: ISM ISM: clouds stars: formation stars: massive submillimeter: ISM |
| 英文摘要 | We report a sample of 463 high-mass starless clump (HMSC) candidates within -60 degrees < l < 60 degrees and -1 degrees < b < 1 degrees. This sample has been singled out from 10,861 ATLASGAL clumps. None of these sources are associated with any known star-forming activities collected in SIMBAD and young stellar objects identified using color-based criteria. We also make sure that the HMSC candidates have neither point sources at 24 and 70 mu m. nor strong extended emission at 24 mu m. Most of the identified HMSCs are infrared dark, and some are even dark at 70 mu m. Their distribution shows crowding in Galactic spiral arms and toward the Galactic center and some wellknown star-forming complexes. Many HMSCs are associated with large-scale filaments. Some basic parameters were attained from column density and dust temperature maps constructed via fitting far-infrared and submillimeter continuum data to modified blackbodies. The HMSC candidates have sizes, masses, and densities similar to clumps associated with Class II methanol masers and H. II. regions, suggesting that they will evolve into star-forming clumps. More than 90% of the HMSC candidates have densities above some proposed thresholds for forming high-mass stars. With dust temperatures and luminosity-to-mass ratios significantly lower than that for star-forming sources, the HMSC candidates are externally heated and genuinely at very early stages of high-mass star formation. Twenty sources with equivalent radii r(eq) < 0.15 pc and mass surface densities Sigma > 0.08 g cm(-2) could be possible high-mass starless cores. Further investigations toward these HMSCs would undoubtedly shed light on comprehensively understanding the birth of high-mass stars. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | YOUNG STELLAR OBJECTS ; INFRARED DARK CLOUDS ; HIERARCHICAL FRAGMENTATION ; MOLECULAR CLOUDS ; ATLASGAL SURVEY ; FORMING CLUMPS ; SOURCE CATALOG ; GAL SURVEY ; MILKY-WAY ; PHYSICAL-PROPERTIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000406016100003 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8869]  |
| 专题 | 国家天文台_应用天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 2.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 3.Univ Tasmania, Sch Phys Sci, Hobart, Tas, Australia 4.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA 5.Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea 6.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 7.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 8.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany 9.Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France |
| 推荐引用方式 GB/T 7714 | Yuan, Jinghua,Wu, Yuefang,Ellingsen, Simon P.,et al. High-mass Starless Clumps in the Inner Galactic Plane: The Sample and Dust Properties[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2017,231(1). |
| APA | Yuan, Jinghua.,Wu, Yuefang.,Ellingsen, Simon P..,Evans, Neal J., II.,Henkel, Christian.,...&Yuan,Jinghua.(2017).High-mass Starless Clumps in the Inner Galactic Plane: The Sample and Dust Properties.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,231(1). |
| MLA | Yuan, Jinghua,et al."High-mass Starless Clumps in the Inner Galactic Plane: The Sample and Dust Properties".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 231.1(2017). |
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来源：国家天文台
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