KMS of Xinjiang Astronomical Observatory, CAS
| Discovery of widespread non-metastable ammonia masers in the Milky Way | |
| Yan, Y. T.1; Henkel, C.1,2; Menten, K. M.1; Wilson, T. L.1; Wootten, A.3; Gong, Y.1; Wyrowski, F.1; Yang, W.1,4; Brunthaler, A.1; Kraus, A.1; Winkel, B.1 | |
| 2024-06-13 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
 |
| ISSN | 0004-6361 |
| Volume | 686Pages:A205 |
| Contribution Rank | 2 |
| Abstract | We present the results of a search for ammonia maser emission in 119 Galactic high-mass star-forming regions (HMSFRs) known to host 22 GHz H2O maser emission. Our survey has led to the discovery of non-metastable NH3 inversion line masers toward 14 of these sources. This doubles the number of known non-metastable ammonia masers in our Galaxy, including nine new very high-excitation (J, K) = (9,6) maser sources. These maser lines, including NH3 (5,4), (6,4), (6,5), (7,6), (8,6), (9,6), (9,8), (10,8), and (11,9), arise from energy levels of 342 K, 513 K, 465 K, 606 K, 834 K, 1090 K, 942 K, 1226 K, and 1449 K above the ground state. Additionally, we tentatively report a new metastable NH3 (3,3) maser in G048.49 and an NH3 (7,7) maser in G029.95. Our observations reveal that all of the newly detected NH(3 )maser lines exhibit either blueshifted or redshifted velocities with respect to the source systemic velocities. Among the non-metastable ammonia maser lines, larger velocity distributions, offset from the source systemic velocities, are found in the ortho-NH3 (K = 3n) transitions than in the para-NH3 (K not equal 3n) ones. |
| Keyword | masers ISM: clouds HII regions |
| DOI | 10.1051/0004-6361/202348931 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | STAR-FORMING REGIONS ; I METHANOL MASERS ; WATER MASERS ; ONLINE DATABASE ; HOT AMMONIA ; MHZ SURVEY ; EMISSION ; H2O ; OH ; LINE |
| Funding Project | China Scholarship Councilhttp://dx.doi.org/10.13039/501100004543 ; International Max Planck Research School (IMPRS) for Astronomy and Astrophysics at the Universities of Bonn and Cologne ; China Scholarship Council (CSC) |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001246762400005 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | China Scholarship Councilhttp://dx.doi.org/10.13039/501100004543 ; International Max Planck Research School (IMPRS) for Astronomy and Astrophysics at the Universities of Bonn and Cologne ; China Scholarship Council (CSC) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6801 |
| Collection | 中国科学院新疆天文台 |
| Corresponding Author | Yan, Y. T. |
| Affiliation | 1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA 4.Nanjing Univ, Sch Astron & Space Sci, 163 Xianlin Ave, Nanjing 210023, Peoples R China |
| Recommended Citation GB/T 7714 | Yan, Y. T.,Henkel, C.,Menten, K. M.,et al. Discovery of widespread non-metastable ammonia masers in the Milky Way[J]. ASTRONOMY & ASTROPHYSICS,2024,686:A205. |
| APA | Yan, Y. T..,Henkel, C..,Menten, K. M..,Wilson, T. L..,Wootten, A..,...&Winkel, B..(2024).Discovery of widespread non-metastable ammonia masers in the Milky Way.ASTRONOMY & ASTROPHYSICS,686,A205. |
| MLA | Yan, Y. T.,et al."Discovery of widespread non-metastable ammonia masers in the Milky Way".ASTRONOMY & ASTROPHYSICS 686(2024):A205. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Yan-2024-Discovery o（1988KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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