The Radio-FIR Correlation in the Milky Way

被引：6
作者：
Zhang, J. [1 ]
Hopkins, A. [1 ,2 ]
Barnes, P. J. [1 ,3 ]
Cagnes, M. [1 ]
Yonekura, Y. [4 ]
Fukui, Y. [5 ]
机构：
[1] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia
[2] Anglo Australian Observ, Epping, NSW 1710, Australia
[3] Univ Florida, Dept Astron, Gainesville, FL 32611 USA
[4] Ibaraki Univ, Fac Sci, Mito, Ibaraki 3108512, Japan
[5] Nagoya Univ, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA | 2010年 / 27卷 / 03期
基金：
澳大利亚研究理事会; 美国国家航空航天局;
关键词：
Galaxy: general; galaxies: evolution; galaxies: spiral; galaxies: starburst; infrared: galaxies; radio continuum: galaxies; STAR-FORMATION RATES; IMAGING SURVEY; SOUTHERN SKY; EMISSION; GALAXIES; SUMSS; DUST;
D O I：
10.1071/AS08072
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the scale on which the correlation arises between the 843 MHz radio and the 60 mm far-infrared (FIR) emission from star forming regions in the Milky way. The correlation, which exists on the smallest scales investigated (down to approximate to 4 pc), becomes noticeably tight on fields of size 300, corresponding to physical scales of approximate to 20-50 pc. The FIR to radio flux ratio on this scale is consistent with the radio emission being dominated by thermal emission. We also investigate the location dependence of q(mean), a parameter measuring the mean FIR to radio flux ratio, of a sample of star forming regions. We show that qmean displays a modest dependence on galactic latitude. If this is interpreted as a dependence on the intensity of star formation activity, the result is consistent with studies of the Large Magellanic Cloud (LMC) and other nearby galaxies that show elevated values for q in regions of enhanced star formation.
引用
收藏
页码：340 / 346
页数：7
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