Resolving molecular gas in the central galaxies of cooling flow clusters

被引:70
作者
Edge, AC
Frayer, DT
机构
[1] Univ Durham, Dept Phys, Durham DH1 3LE, England
[2] CALTECH, SIRTF Sci Ctr, Pasadena, CA 91125 USA
基金
美国国家科学基金会; 美国国家航空航天局;
关键词
cooling flows; galaxies : clusters : general;
D O I
10.1086/378386
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present aperture synthesis images of the CO (1-0) line emission in five central galaxies in cooling flow clusters using the Owens Valley Millimeter Array. Three of the five sources are significantly resolved, but the majority of the emission is from a compact (<20 kpc) region centered on the central galaxy. These results are consistent with the newly emerging view that cooling flows deposit much less gas over a shorter period in a smaller volume than previously thought. The size constraints derived imply that the molecular gas has a large (> 10(22) cm(-2)) column density. We review the implications of these results and the prospects for observations in the near future.
引用
收藏
页码:L13 / L17
页数:5
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