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IRAS 15250+3609: minor merger revealed as an OH MegaMaser

文献类型：期刊论文

作者Tegegne, A. G.3,4,5; Baan, Willem A.2,5; Esimbek, Jarken1,4,5,6; Li, Dalei1,4,5,6
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2025-10-01
卷号543期号:1页码:841-850
关键词masers galaxies: active galaxies: individual: IRAS 15250+3609 galaxies: interactions galaxies: kinematics and dynamics galaxies: starburst
ISSN号0035-8711
DOI10.1093/mnras/staf1504
产权排序1
英文摘要High-resolution European VLBI Network-Multi-Element Radio Linked Interferometer Network (EVN-MERLIN) observations have been conducted for the study of the nature and structure of the OH MegaMaser emission in the ultraluminous infrared galaxy (ULIRG) IRAS 15250+3609. The OH MegaMaser emission in IRAS 15250+3609 is found to be superposed on and confined within the nuclear source of the host galaxy having an active galactic nucleus (AGN) and an extended starburst region size of 130 by 95 pc. The 1667 and 1665 MHz OH emission covers a velocity range from -250 km s$<^>{-1}$ below to 400 km s$<^>{-1}$ above the assumed systemic velocity of the host galaxy with a strong and systematic velocity gradient from west to east across the nucleus. The excitation for any systemic and dominant foreground OH molecules comes from the far-infrared (FIR) radiation field emanating from the starburst nucleus of the host galaxy allowing for maser amplification of the nuclear radio continuum in the background. The velocity signature and the structure of the OH emission indicate that the masering foreground material is part of a progressing minor merger with a dwarf galaxy falling nearly radially into the nucleus of IRAS 15250+3609 from the west. Three velocity ranges can be identified in the merger process: high velocity for infalling material that is still mostly unperturbed, an intermediate velocity range where infalling material first interacts with the host galaxy, and a negative velocity region where material has already crashed into the host.
WOS关键词ULTRALUMINOUS INFRARED GALAXIES ; MOLECULAR OUTFLOWS ; SPECTROSCOPY ; EMISSION ; REGIONS ; SEARCH ; ULIRGS
资助项目National Key Research and Development of China[2022YFA1603103] ; National Key Research and Development of China[2023YFA1608002] ; National Key R&D Program of China ; Tianshan Talent Training Program[2022E01050] ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region[12173075] ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Arba Minch University ; University of Chinese Academy of Science[2022ANP10104] ; ANSO Scholarship Programme
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001577944100001
出版者OXFORD UNIV PRESS
资助机构National Key Research and Development of China ; National Key R&D Program of China ; Tianshan Talent Training Program ; Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Arba Minch University ; University of Chinese Academy of Science ; ANSO Scholarship Programme
源URL[http://ir.xao.ac.cn/handle/45760611-7/8175]  
专题恒星形成与演化研究团组
通讯作者Baan, Willem A.; Esimbek, Jarken; Li, Dalei
作者单位1.State Key Lab Radio Astron & Technol, A20 Datun Rd, Beijing 100101, Peoples R China
2.Netherlands Inst Radio Astron ASTRON, NL-7991 PD Dwingeloo, Netherlands
3.Arba Minch Univ, Coll Nat & Computat Sci, Dept Phys, Arba Minch, Ethiopia
4.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
6.Chinese Acad Sci, Xinjiang Key Lab Radio Astrophys, Urumqi 83001, Peoples R China
推荐引用方式
GB/T 7714		 Tegegne, A. G.,Baan, Willem A.,Esimbek, Jarken,et al. IRAS 15250+3609: minor merger revealed as an OH MegaMaser[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2025,543(1):841-850.
APA Tegegne, A. G.,Baan, Willem A.,Esimbek, Jarken,&Li, Dalei.(2025).IRAS 15250+3609: minor merger revealed as an OH MegaMaser.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,543(1),841-850.
MLA Tegegne, A. G.,et al."IRAS 15250+3609: minor merger revealed as an OH MegaMaser".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 543.1(2025):841-850.

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来源：新疆天文台

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