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| The OH Megamaser emission in Arp 220: the rest of the story | |
Baan, Willem A.1,2,3 ; Aditya, J. N. H. S.3,4,5; An, Tao3; Kloeckner, Hans-Rainer6
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| 2023-06-22 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| ISSN | 0035-8711 |
| Volume | 523Issue:4Pages:5487-5501 |
| Contribution Rank | 2 |
| Abstract | The OH Megamaser emission in the merging galaxy Arp 220 has been re-observed with the Multi-Element Radio Linked Interferometer Network (MERLIN) and the European VLBI Network (EVN). Imaging results of the OH line emission at the two nuclei are found to be consistent with earlier observations and confirm additional extended emission structures surrounding the nuclei. Detailed information about the distributed emission components around the two nuclei has been obtained using a concatenated MERLIN and EVN database with intermediate (40 mas) spatial resolution. Continuum imaging shows a relatively compact West nucleus and a more extended East nucleus in addition to an extended continuum ridge stretching below and beyond the two nuclei. Spectral line imaging show extended emission regions at both nuclei together with compact components and additional weaker components north and south of the West nucleus. Spectral line analysis indicates that the dominant OH line emission originates in foreground molecular material that is part of a large-scale molecular structure that engulfs the whole nuclear region. Compact OH components are representative of star formation regions within the two nearly edge-on nuclei and define the systemic velocities of East and West as 5425 and 5360 km s(-1). The foreground material at East and West has a 100 km s(-1) lower velocity at 5314 and 5254 km s(-1). These emission results confirm a maser amplification scenario where the background continuum and the line emission of the star formation regions are amplified by foreground masering material that is excited by the far-infrared radiation field originating in the two nuclear regions. |
| Keyword | masers ISM: molecules galaxies:ISM galaxies: nuclei radio lines: galaxies radio lines: ISM |
| DOI | 10.1093/mnras/stad1770 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | INFRARED PROPERTIES ; RADIO SUPERNOVAE ; POPULATION ; KINEMATICS ; GALAXIES ; SPECTRA ; NUCLEUS ; ARP-220 ; IC-4553 ; IMAGES |
| Funding Project | National Natural Science Foundation of China[11433008] ; Chinese Academy of Sciences Presidents International Fellowship Initiative[2021VMA0008] ; Chinese Academy of Sciences Presidents International Fellowship Initiative[2022VMA0019] ; National SKA Program of China[2022SKA0120102] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001023895800039 |
| Publisher | OXFORD UNIV PRESS |
| Funding Organization | National Natural Science Foundation of China ; Chinese Academy of Sciences Presidents International Fellowship Initiative ; National SKA Program of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/5366 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 |
| Corresponding Author | Baan, Willem A. |
| Affiliation | 1.Netherlands Inst Radio Astron ASTRON, NL-7991 PD Dwingeloo, Netherlands 2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.Univ Sydney, Sydney Inst Astron, Sch Phys A28, Sydney, NSW 2006, Australia 5.ARC Ctr Excellence All Sky Astrophys 3 Dimens ASTR, Perth, Australia 6.Max Planck Inst Radioastron, Auf Hugel 69, D-53121 Bonn, Germany |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Baan, Willem A.,Aditya, J. N. H. S.,An, Tao,et al. The OH Megamaser emission in Arp 220: the rest of the story[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2023,523(4):5487-5501. |
| APA | Baan, Willem A.,Aditya, J. N. H. S.,An, Tao,&Kloeckner, Hans-Rainer.(2023).The OH Megamaser emission in Arp 220: the rest of the story.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,523(4),5487-5501. |
| MLA | Baan, Willem A.,et al."The OH Megamaser emission in Arp 220: the rest of the story".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 523.4(2023):5487-5501. |
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| File Name/Size | DocType | Version | Access | License | ||
| Baan-2023-The OH Meg（2787KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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