ALMA view of the C-12/C-13 isotopic ratio in starburst galaxies

doi:10.1051/0004-6361/201935603

	ALMA view of the C-12/C-13 isotopic ratio in starburst galaxies
	Tang, X. D.1,2,3; Henkel, C.1,3,4; Menten, K. M.3; Gong, Y.3; Martin, S.5,6; Muehle, S.7; Aalto, S.8; Muller, S.8; Garcia-Burillo, S.9; Levshakov, S.10
刊名	ASTRONOMY & ASTROPHYSICS
	2019-08-22
卷号	629 页码:10
关键词	galaxies: abundances galaxies: starburst galaxies: nuclei galaxies: ISM radio lines: ISM
ISSN号	1432-0746
DOI	10.1051/0004-6361/201935603
通讯作者	Tang, X. D.(tangxindi@xao.ac.cn)
英文摘要	We derive molecular-gas-phase C-12/C-13 isotope ratios for the central few hundred parsecs of the three nearby starburst galaxies NGC 253, NGC 1068, and NGC 4945 making use of the lambda similar to 3 mm (CN)-C-12 and (CNN)-C-13= 1-0 lines in the ALMA Band 3. The C-12/C-13 isotopic ratios derived from the ratios of these lines range from 30 to 67 with an average of 41.6 +/- 0.2 in NGC 253, from 24 to 62 with an average of 38.3 +/- 0.4 in NGC 1068, and from 6 to 44 with an average of 16.9 +/- 0.3 in NGC 4945. The highest C-12/C-13 isotopic ratios are determined in some of the outskirts of the nuclear regions of the three starburst galaxies. The lowest ratios are associated with the northeastern and southwestern molecular peaks of NGC 253, the northeastern and southwestern edge of the mapped region in NGC 1068, and the very center of NGC 4945. In the case of NGC 1068, the measured ratios suggest inflow from the outer part of NGC 1068 into the circum-nuclear disk through both the halo and the bar. Low C-12/C-13 isotopic ratios in the central regions of these starburst galaxies indicate the presence of highly processed material.
WOS关键词	CIRCUMNUCLEAR MOLECULAR GAS ; H-II REGIONS ; NEARBY GALAXIES ; DENSE GAS ; INTERSTELLAR-MEDIUM ; ACTIVE NUCLEUS ; NGC 253 ; CN ; MILLIMETER ; FORMALDEHYDE
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000482762600006
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/27896]
专题	中国科学院紫金山天文台
通讯作者	Tang, X. D.
作者单位	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Urumqi 830011, Peoples R China 3.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 4.King Abdulaziz Univ, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 5.European Southern Observ, Alonso de Cordova 3107, Santiago 7630355, Chile 6.Joint ALMA Observ, Alonso de Cordova 3107, Santiago 7630355, Chile 7.Univ Bonn, Argelander Inst Astron, Hugel 71, D-53121 Bonn, Germany 8.Chalmers Univ Technol, Dept Earth & Space Sci, Onsala Observ, S-43992 Onsala, Sweden 9.OAN IGN, Observ Madrid, Alfonso XII 3, Madrid 28014, Spain 10.Ioffe Phys Tech Inst, Polytekhn Skaya Str 26, St Petersburg 194021, Russia
推荐引用方式 GB/T 7714	Tang, X. D.,Henkel, C.,Menten, K. M.,et al. ALMA view of the C-12/C-13 isotopic ratio in starburst galaxies[J]. ASTRONOMY & ASTROPHYSICS,2019,629:10.
APA	Tang, X. D..,Henkel, C..,Menten, K. M..,Gong, Y..,Martin, S..,...&Zhou, J. J..(2019).ALMA view of the C-12/C-13 isotopic ratio in starburst galaxies.ASTRONOMY & ASTROPHYSICS,629,10.
MLA	Tang, X. D.,et al."ALMA view of the C-12/C-13 isotopic ratio in starburst galaxies".ASTRONOMY & ASTROPHYSICS 629(2019):10.