Fragmentation of the High-mass "Starless" Core G10.21-0.31: A Coherent Evolutionary Picture for Star Formation

被引：8
|
作者：
Jiao, Wenyu [1 ,2 ]
Wang, Ke [1 ]
Pillai, Thushara G. S. [3 ]
Baug, Tapas [4 ]
Zhang, Siju [1 ]
Xu, Fengwei [1 ,2 ]
机构：
[1] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
[2] Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
[3] MIT Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA
[4] SN Bose Natl Ctr Basic Sci, Block JD,Sect 3, Kolkata 700106, India
来源：
ASTROPHYSICAL JOURNAL | 2023年 / 945卷 / 01期
基金：
美国国家航空航天局; 美国国家科学基金会;
关键词：
INFRARED DARK CLOUD; GALACTIC PLANE; INITIAL CONDITIONS; ALMA SURVEY; HIERARCHICAL FRAGMENTATION; DEUTERIUM FRACTIONATION; II; FRAGMENTATION; MOLECULAR OUTFLOW; FORMING REGIONS; DENSE CORES;
D O I：
10.3847/1538-4357/acb211
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
G10.21-0.31 is a 70 mu m dark high-mass starless core (M > 300 M (circle dot) within r < 0.15 pc) identified in the Spitzer, Herschel, and APEX continuum surveys, and is believed to harbor the initial stages of high-mass star formation. We present Atacama Large Millimeter/submillimeter Array (ALMA) and Submillimeter Array observations to resolve the internal structure of this promising high-mass starless core. Sensitive high-resolution ALMA 1.3 mm dust continuum emission reveals three cores of mass ranging within 11-18 M (circle dot), characterized by a turbulent fragmentation. Cores 1, 2, and 3 represent a coherent evolution of three different stages, characterized by outflows (CO and SiO), gas temperature (H2CO), and deuteration (N2D+/N2H+). We confirm the potential for formation of high-mass stars in G10.21 and explore the evolution path of high-mass star formation. Yet, no high-mass prestellar core is present in G10.21. This suggests a dynamical star formation where cores grow in mass over time.
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页数：19
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