First detection of the J-1 → (J-1)0 - E methanol maser transitions at J=7 and 10
文献类型：期刊论文
| 作者 | Humire, Pedro K.2,3,4,5; Ortiz-Leon, Gisela N.3,6; Hernandez-Gomez, Antonio7; Yang, Wenjin3,8; Henkel, Christian3,9; Martin, Sergio1 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2024-07-30 |
| 卷号 | 688页码:L1 |
| 关键词 | masers stars: formation stars: low-mass stars: protostars ISM: molecules submillimeter: stars |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202451008 |
| 产权排序 | 8 |
| 英文摘要 | Context. Class I methanol masers provide sensitive information about the shocked environment around star-forming regions. Among the brightest Class I methanol masers, we have those in the J(-1) -> (J - 1)(0) - E line series, currently reported for the J = 4 - 9 transitions, with the only exception being the J = 7 one at 181.295 GHz, and never expanded to higher J transitions. Aims. We aim to search for population inversion in the 7(-1) -> 6(0) - E and 10(-1) -> 9(0) - E methanol transition lines at 181.295 and 326.961 GHz, respectively, and also extend the number of known low-mass star-forming sources harboring Class I methanol masers. Methods. We employed the Atacama Pathfinder Experiment (APEX) 12 m telescope to survey low-mass Galactic sources, focusing on methanol emission lines. We built rotation diagrams for all sources with detected J = 7 methanol line transitions, while employing radiative transfer modeling (both in and out of local thermodynamic equilibrium) to characterize methanol excitation conditions in detail for one specific source with detected masers. Results. We detected the 7(-1) -> 6(0) - E and 10(-1) -> 9(0) - E methanol transitions in 6 out of 19 sources. Among them, we firmly determined the 10(-1) -> 9(0) - E maser nature in CARMA 7, L1641N, NGC 2024, and Serpens FIRS, and we show evidence for the presence of inverted population emission in the 7(-1) -> 6(0) - E line toward CARMA 7 and L1641N. This represents the first report of methanol maser emission in these particular transitions. Our study supports previous works indicating that conditions for Class I methanol maser emission are satisfied in low-mass star-forming regions and expands the range of detectable frequencies toward higher values. |
| WOS关键词 | STAR-FORMATION ; MOLECULAR OUTFLOW ; INTERSTELLAR LINE ; SERPENS ; WATER ; CLUSTER ; NGC-2024 ; AMMONIA ; INFALL ; CONSTRAINTS |
| 资助项目 | Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)[2023/14272-4] ; Joint ALMA Observatory (JAO) ; UNAM-DGAPA |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001280641700018 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) ; Joint ALMA Observatory (JAO) ; UNAM-DGAPA |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6907]  |
| 专题 | 恒星形成与演化研究团组 |
| 通讯作者 | Humire, Pedro K. |
| 作者单位 | 1.European Southern Observ, Alonso de Cordova 3107, Santiago 7630355, Chile 2.Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, BR-05508090 Sao Paulo, SP, Brazil 3.Max Planck Inst Radioastron, Auf Hugel 69, D-53121 Bonn, Germany 4.Joint ALMA Observ, Alonso de Cordova 3107, Santiago, Chile 5.Univ Tecn Federico Santa Maria, Dept Fis, Casilla 110-V,Avda Espana 1680, Valparaiso, Chile 6.Inst Nacl Astrofis Opt & Electr, Apartado Postal 51 & 216, Puebla 72000, Mexico 7.Tecnol Monterrey, Escuela Ingn & Ciencias, Ave Eugenio Garza Sada 2501, Monterrey 64849, Mexico 8.Nanjing Univ, Sch Astron & Space Sci, 163 Xianlin Ave, Nanjing 210023, Peoples R China 9.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Humire, Pedro K.,Ortiz-Leon, Gisela N.,Hernandez-Gomez, Antonio,et al. First detection of the J-1 → (J-1)0 - E methanol maser transitions at J=7 and 10[J]. ASTRONOMY & ASTROPHYSICS,2024,688:L1. |
| APA | Humire, Pedro K.,Ortiz-Leon, Gisela N.,Hernandez-Gomez, Antonio,Yang, Wenjin,Henkel, Christian,&Martin, Sergio.(2024).First detection of the J-1 → (J-1)0 - E methanol maser transitions at J=7 and 10.ASTRONOMY & ASTROPHYSICS,688,L1. |
| MLA | Humire, Pedro K.,et al."First detection of the J-1 → (J-1)0 - E methanol maser transitions at J=7 and 10".ASTRONOMY & ASTROPHYSICS 688(2024):L1. |
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