Investigations of the Class I methanol masers in NGC 4945
文献类型：期刊论文
| 作者 | McCarthy, T. P.5,6; Ellingsen, S. P.6; Breen, S. L.4; Henkel, C.2,3; Voronkov, M. A.5; Chen, X.1,7 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2018-11-01 |
| 卷号 | 480期号:4页码:4578-4588 |
| 关键词 | Masers Galaxies: Starburst Radio Lines: Galaxies |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/sty2192 |
| 英文摘要 | We have used the Australia Telescope Compact Array (ATCA) to conduct further observations of the 36.2-GHz (4(-1) -> 3(0)E) methanol transition towards the nearby active galaxy NGC 4945. These observations have led to a more accurate determination of the offset between the maser emission and the nucleus of NGC 4945 with a typical synthesized beam of 6 arcsec x 4 arcsec (108 x 72 pc). This corresponds to a factor of 4 improvement with respect to the major axis of the beam. Other transitions of methanol and lines of other molecular species were obtained alongside the 36.2-GHz methanol emission, with strong detections of HC3N (J = 4 -> 3) and CS (J = 1 -> 0) presented here. We do not detect thermal methanol (5 sigma upper limit of 5 mJy in a 6 km s(-1) channel) from the 48.4-GHz (1(0) -> 0(0)A(+)) ground-state transition, nor emission from the 44.1-GHz (7(0) -> 6(1)A(+)) class I maser transition (5 sigma upper limit of 6 mJy in a 3 km s(-1) channel). We also present a comparison of the class I maser emission observed towards NGC 4945 with that from NGC 253 and towards the Galactic giant molecular cloud G 1.6-0.025. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000449617100024 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://119.78.226.72/handle/331011/32191]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | McCarthy, T. P. |
| 作者单位 | 1.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China 2.King Abdulaziz Univ, Fac Sci, Dept Astron, POB 80203, Jeddah 21589, Saudi Arabia 3.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 4.Univ Sydney, Sch Phys, SIfA, Sydney, NSW 2006, Australia 5.CSIRO, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia 6.Univ Tasmania, Sch Nat Sci, Private Bag 37, Hobart, Tas 7001, Australia 7.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | McCarthy, T. P.,Ellingsen, S. P.,Breen, S. L.,et al. Investigations of the Class I methanol masers in NGC 4945[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,480(4):4578-4588. |
| APA | McCarthy, T. P.,Ellingsen, S. P.,Breen, S. L.,Henkel, C.,Voronkov, M. A.,&Chen, X..(2018).Investigations of the Class I methanol masers in NGC 4945.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,480(4),4578-4588. |
| MLA | McCarthy, T. P.,et al."Investigations of the Class I methanol masers in NGC 4945".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 480.4(2018):4578-4588. |
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来源：上海天文台
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