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

页码：340 / 346

页数：7

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