Studies of the distinct regions due to CO selective dissociation in the Aquila molecular cloud

doi:10.1051/0004-6361/202038632

	Studies of the distinct regions due to CO selective dissociation in the Aquila molecular cloud
	Komesh, Toktarkhan 3,4,5; Baan, Willem 3,6; Esimbek, Jarken 1,3; Zhou, Jianjun 1,3; Li, Dalei 1,3; Wu, Gang 1,3; He, Yuxin 1,3; Rosli, Zulfazli 2; Ibraimov, Margulan 5
刊名	ASTRONOMY & ASTROPHYSICS
	2020-12-01
卷号	644 页码:A46
关键词	ISM: clouds evolution ISM: abundances ISM: molecules photon-dominated region stars: formation
ISSN号	0004-6361
DOI	10.1051/0004-6361/202038632
产权排序	1
英文摘要	Aims. We investigate the role of selective dissociation in the process of star formation by comparing the physical parameters of protostellar-prestellar cores and the selected regions with the CO isotope distributions in photo-dissociation regions. We seek to understand whether there is a better connection between the evolutionary age of star forming regions and the effect of selective dissociationMethods. We used wide-field observations of theO (J = 1-0) emission lines to study the ongoing star formation activity in the Aquila molecular region, and we used the 70 and 250 mu m data to describe the heating of the surrounding material and as an indicator of the evolutionary age of the core.Results. The protostellar-prestellar cores are found at locations with the highest CO column densities and their increasing evolutionary age coincides with an increasing 70 mu m/250 mu m emission ratio at their location. The evolutionary age of the cores may also follow from the CO versus CO abundance ratio, which decreases with increasing CO column densities. The original mass has been estimated for nine representative star formation regions and the original mass of the region correlates well with the integrated 70 mu m flux density. Similarly, the X ratio, which provides the dissociation rate for these regions correlates with the 70 mu m/250 mu m flux density ratio and reflects the evolutionary age of the star formation activity.
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资助项目	CAS-TWAS President's Fellowship for International Doctoral Students ; National Natural Science foundation of China[11433008] ; National Natural Science foundation of China[11973076] ; National Natural Science foundation of China[11703074] ; National Natural Science foundation of China[11703073] ; National Natural Science foundation of China[11603063] ; Chinese Academy of Sciences President's International Fellowship Initiative[2021VMA0008] ; Chinese Academy of Sciences President's International Fellowship Initiative[2019VMA0040] ; University of Malaya[UMRG FG033-017AFR]
WOS关键词	DUST ; PHOTODISSOCIATION ; EXCITATION ; GAS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000596605000001
资助机构	CAS-TWAS President's Fellowship for International Doctoral Students ; National Natural Science foundation of China ; Chinese Academy of Sciences President's International Fellowship Initiative ; University of Malaya
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3790]
专题	新疆天文台_射电天文研究室
通讯作者	Komesh, Toktarkhan; Baan, Willem; Esimbek, Jarken
作者单位	1.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 2.Univ Malaya, Dept Phys, Fac Sci, Kuala Lumpur 50603, Malaysia 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100080, Peoples R China 5.Al Farabi Kazakh Natl Univ, Fac Phys & Technol, Dept Solid State Phys & Nonlinear Phys, Alma Ata 050040, Kazakhstan 6.ASTRON, Netherlands Inst Radio Astron, NL-7991 PD Dwingeloo, Netherlands
推荐引用方式 GB/T 7714	Komesh, Toktarkhan,Baan, Willem,Esimbek, Jarken,et al. Studies of the distinct regions due to CO selective dissociation in the Aquila molecular cloud[J]. ASTRONOMY & ASTROPHYSICS,2020,644:A46.
APA	Komesh, Toktarkhan.,Baan, Willem.,Esimbek, Jarken.,Zhou, Jianjun.,Li, Dalei.,...&Ibraimov, Margulan.(2020).Studies of the distinct regions due to CO selective dissociation in the Aquila molecular cloud.ASTRONOMY & ASTROPHYSICS,644,A46.
MLA	Komesh, Toktarkhan,et al."Studies of the distinct regions due to CO selective dissociation in the Aquila molecular cloud".ASTRONOMY & ASTROPHYSICS 644(2020):A46.