Investigations of the Class I methanol masers in NGC 4945

doi:10.1093/mnras/sty2192

CORC > 上海天文台 > 中国科学院上海天文台

	Investigations of the Class I methanol masers in NGC 4945
	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
	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
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000449617100024
内容类型	期刊论文
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.