Infrared colour properties of nearby radio-luminous galaxies

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	Infrared colour properties of nearby radio-luminous galaxies
	Yang, XH1,2 ; Chen PS(陈培生)3 ; Huang, Y 1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2015-05-21
卷号	449 期号:3 页码:3191-3201
关键词	surveys galaxies: active galaxies: photometry galaxies: star formation infrared: galaxies
ISSN号	0035-8711
通讯作者	Yang, XH (reprint author), Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China.
产权排序	第三完成单位
英文摘要	By combining the data of the Two Micron All Sky Survey, the Wide-Field Infrared Survey Explorer and the AKARI satellite, we study the infrared colour properties of a sample of 2712 nearby radio-luminous galaxies (RLGs). These RLGs are divided into radio-loud (RL) active galactic nuclei (AGNs), mainly occurring at redshifts of 0.05 < z < 0.3 and star-forming-dominated RLGs (SFGs), mainly occurring at redshifts of 0.01 < z < 0.15. RLAGNs and SFGs are separately distributed in the ([3.4]-[4.6])-([4.6]-[12]) two-colour diagram, in which the RL AGNs display a double-core distribution, and the SFGs display a single-core distribution. SFGs have a redder [4.6]-[12] colour than RL AGNs due to the significant contribution from the dust component of SFGs. We find simple criteria of mid-infrared (MIR) colour separation between RL AGNs and SFGs such that: 95 per cent of RL AGNs have [4.6]-[12] < 3.0 and 94 per cent of SFGs have [4.6]-[12] > 3.0. We also analyse the MIR colours of RL AGNs divided into low-and high-excitation radio galaxies (LERGs and HERGs, respectively). The ([3.4]-[4.6])-([4.6]-[12]) diagram clearly shows separate distributions of LERGs and HERGs and a region of overlap, which suggests that LERGs and HERGs have different MIR properties. LERGs are responsible for the double-core distribution of RL AGNs on the ([3.4]-[4.6])-([4.6]-[12]) diagram. In addition, we also suggest 90-140 mu m band spectral index a(90, 140) < -1.4 as a criterion of selecting nearby active galaxies with non-thermal emissions at far-infrared wavelengths.
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]	ACTIVE GALACTIC NUCLEI ; SPECTRAL ENERGY-DISTRIBUTIONS ; DIGITAL-SKY-SURVEY ; ADVECTION-DOMINATED ACCRETION ; STAR-FORMING GALAXIES ; MIDINFRARED SELECTION ; BLACK-HOLES ; SPITZER OBSERVATIONS ; SPIRAL GALAXIES ; QUASARS
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/449/3/3191
语种	英语
WOS记录号	WOS:000355337800077
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4263]
专题	云南天文台_其他
作者单位	1.Department of Physics, Chongqing University, Chongqing 400044, China 2.Institute of Theoretical Physics, Chongqing University, Chongqing 400044, China 3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110 Kunming, Yunnan Province 650011, China
推荐引用方式 GB/T 7714	Yang, XH,Chen PS,Huang, Y. Infrared colour properties of nearby radio-luminous galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,449(3):3191-3201.
APA	Yang, XH,Chen PS,&Huang, Y.(2015).Infrared colour properties of nearby radio-luminous galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,449(3),3191-3201.
MLA	Yang, XH,et al."Infrared colour properties of nearby radio-luminous galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 449.3(2015):3191-3201.