The JCMT Gould Belt Survey: a first look at Southern Orion A with SCUBA-2
文献类型：期刊论文
| 作者 | Mairs, S.2,3; Johnstone, D.2,3; Kirk, H.3; Buckle, J.4,5; Berry, D. S.6; Broekhoven-Fiene, H.2,3; Currie, M. J.6; Fich, M.7; Graves, S.6,8; Hatchell, J.9 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 461期号:4页码:4022-4048 |
| 关键词 | stars: formation stars: protostars ISM: structure submillimetre: general submillimetre: ISM |
| 英文摘要 | We present the JCMT Gould Belt Survey's first look results of the southern extent of the Orion A Molecular Cloud (delta <= -5: 31: 27.5). Employing a two-step structure identification process, we construct individual catalogues for large-scale regions of significant emission labelled as islands and smaller-scale subregions called fragments using the 850 mu m continuum maps obtained using SCUBA-2. We calculate object masses, sizes, column densities, and concentrations. We discuss fragmentation in terms of a Jeans instability analysis and highlight interesting structures as candidates for follow-up studies. Furthermore, we associate the detected emission with young stellar objects (YSOs) identified by Spitzer and Herschel. We find that although the population of active star-forming regions contains a wide variety of sizes and morphologies, there is a strong positive correlation between the concentration of an emission region and its calculated Jeans instability. There are, however, a number of highly unstable subregions in dense areas of the map that show no evidence of star formation. We find that only similar to 72 per cent of the YSOs defined as Class 0+I and flat-spectrum protostars coincide with dense 850 mu m emission structures (column densities > 3.7 x 10(21) cm(-2)). The remaining 28 per cent of these objects, which are expected to be embedded in dust and gas, may be misclassified. Finally, we suggest that there is an evolution in the velocity dispersion of YSOs such that sources which are more evolved are associated with higher velocities. |
| 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 ; CLERK MAXWELL TELESCOPE ; PERSEUS MOLECULAR CLOUD ; CURRENT STAR-FORMATION ; SMALL-SCALE STRUCTURES ; MAIN-SEQUENCE STARS ; CORE MASS FUNCTION ; 850 MU-M ; UNBIASED SUBMILLIMETER ; CLUMP IDENTIFICATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000383514900052 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6778]  |
| 专题 | 国家天文台_射电天文研究部 |
| 作者单位 | 1.Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany 2.Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 1A1, Canada 3.NRC Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada 4.Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE, England 5.Univ Cambridge, Kavli Inst Cosmol, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England 6.Joint Astron Ctr, 660 North A Ohoku Pl,Univ Pk, Hilo, HI 96720 USA 7.Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada 8.East Asian Observ, 660 North A Ohoku Pl,Univ Pk, Hilo, HI 96720 USA 9.Univ Exeter, Phys & Astron, Stocker Rd, Exeter EX4 4QL, Devon, England 10.Large Synopt Survey Telescope Project Off, 933 N Cherry Ave, Tucson, AZ 85721 USA |
| 推荐引用方式 GB/T 7714 | Mairs, S.,Johnstone, D.,Kirk, H.,et al. The JCMT Gould Belt Survey: a first look at Southern Orion A with SCUBA-2[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,461(4):4022-4048. |
| APA | Mairs, S..,Johnstone, D..,Kirk, H..,Buckle, J..,Berry, D. S..,...&Zhu, M..(2016).The JCMT Gould Belt Survey: a first look at Southern Orion A with SCUBA-2.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,461(4),4022-4048. |
| MLA | Mairs, S.,et al."The JCMT Gould Belt Survey: a first look at Southern Orion A with SCUBA-2".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 461.4(2016):4022-4048. |
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来源：国家天文台
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