Radially inflowing molecular gas in NGC 1275 deposited by an X-ray cooling flow in the Perseus Cluster

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 分子云与恒星形成研究团组

	Radially inflowing molecular gas in NGC 1275 deposited by an X-ray cooling flow in the Perseus Cluster
	Lim, Jeremy 1; Ao, YiPing2 ; Trung, Dinh-V 1
刊名	ASTROPHYSICAL JOURNAL
	2008
卷号	672 期号:1 页码:252-265
关键词	cooling flows galaxies : active galaxies : individual (Perseus A, 3C 84) galaxies : ISM ISM : molecules radio lines : ISM
ISSN号	0004-637X
英文摘要	We have imaged in CO(2-1) the molecular gas in NGC 1275 (Perseus A), the cD galaxy at the center of the Perseus Cluster, at a spatial resolution of similar to 1 kpc over a central region of radius similar to 10 kpc. Per A is known to contain similar to 1.3 x 10(10) M(circle dot) of molecular gas, which has been proposed to be captured from mergers with or ram pressure stripping of gas-rich galaxies, or accreted from a X-ray cooling flow. The molecular gas detected in our image has a total mass of similar to 4 x 10(9) M(circle dot), and for the first time can be seen to be concentrated in three radial filaments with lengths ranging from at least 1.1 to 2.4 kpc, all lying in the east-west directions spanning the center of the galaxy to radii of similar to 8 kpc. The eastern and outer western filaments exhibit larger blueshifted velocities with decreasing radii, whereas the inner western filament spans the systemic velocity of the galaxy. The molecular gas shows no signature of orbital motion, and is therefore unlikely to have been captured from gas-rich galaxies. Instead, we are able to reproduce the observed kinematics of the two outer filaments as free fall in the gravitational potential of Per A, as would be expected if they originate from a X-ray cooling flow. Indeed, all three filaments lie between two prominent X-ray cavities carved out by radio jets from Per A, and closely resemble the spatial distribution of the coolest X-ray gas in the cluster core. The inferred mass deposition rate into the two outermost filaments alone is roughly 75 M(circle dot) yr(-1). This cooling flow can provide a nearly continuous supply of molecular gas to fuel the active nucleus in Per A.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	POWERFUL RADIO GALAXIES ; HIGH-VELOCITY SYSTEM ; SPACE-TELESCOPE OBSERVATIONS ; EMISSION-LINE NEBULAE ; ELLIPTIC GALAXIES ; NGC 1275 ; CO OBSERVATIONS ; HYDROGEN ABSORPTION ; CHANDRA OBSERVATION ; NEARBY CLUSTERS
收录类别	SCI
语种	英语
WOS记录号	WOS:000253454000023
公开日期	2011-12-29
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1845]
专题	紫金山天文台_分子云与恒星形成研究团组
作者单位	1.Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Lim, Jeremy,Ao, YiPing,Trung, Dinh-V. Radially inflowing molecular gas in NGC 1275 deposited by an X-ray cooling flow in the Perseus Cluster[J]. ASTROPHYSICAL JOURNAL,2008,672(1):252-265.
APA	Lim, Jeremy,Ao, YiPing,&Trung, Dinh-V.(2008).Radially inflowing molecular gas in NGC 1275 deposited by an X-ray cooling flow in the Perseus Cluster.ASTROPHYSICAL JOURNAL,672(1),252-265.
MLA	Lim, Jeremy,et al."Radially inflowing molecular gas in NGC 1275 deposited by an X-ray cooling flow in the Perseus Cluster".ASTROPHYSICAL JOURNAL 672.1(2008):252-265.