CS (5-4) survey towards nearby infrared bright galaxies

被引：23
|
作者：
Wang, Junzhi [1 ,2 ,3 ]
Zhang, Zhiyu [3 ,4 ,5 ]
Shi, Yong [6 ]
机构：
[1] Nanjing Univ, Dept Astron, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
[3] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
[4] Max Planck Inst Radioastron, D-53121 Bonn, Germany
[5] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[6] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 416卷 / 01期
关键词：
ISM: molecules; galaxies: ISM; radio lines: galaxies;
D O I：
10.1111/j.1745-3933.2011.01090.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
With the observations of the CS (5-4) line towards a sample of 24 infrared bright galaxies using Heinrich Hertz Submillimeter Telescope (HHSMT), we detected CS (5-4) emission in 14 galaxies, including 12 ultraluminous infrared galaxies (ULIRGs)/luminous infrared galaxies (LIRGs) and two nearby normal galaxies. As a good dense gas tracer, which has been well used for studying star formation in the Milky Way, CS (5-4) can trace the active star-forming gas in galaxies. The correlation between CS (5-4) luminosity, which is estimated with detected CS (5-4) line emission, and the infrared luminosity in these 14 galaxies, is fitted with a correlation coefficient of 0.939 and a slope close to unity. This correlation confirms that dense gas, which is closely linked to star formation, is very important for understanding star formation in galaxies.
引用
收藏
页码：L21 / L25
页数：5
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