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DIFFERENCES IN HALO-SCALE ENVIRONMENTS BETWEEN TYPE 1 AND TYPE 2 AGNs AT LOW REDSHIFT
Jiang, N1; Wang, HY1; Mo, HJ2,3; Dong XB(董小波)4,5; Wang, TG1; Zhou, HY1,6
Source PublicationASTROPHYSICAL JOURNAL
2016-12-01
Volume832Issue:2
DOI10.3847/0004-637X/832/2/111
Contribution Rank第4完成单位
Indexed BySCI
KeywordGalaxies: Active Galaxies: General Galaxies: Halos Galaxies: Interactions
Abstract

Using low-redshift (z < 0.09) samples of active galactic nuclei (AGNs), normal galaxies and groups of galaxies selected from the Sloan Digital Sky Survey, we study the environments of Type. 1 and Type. 2 AGNs, both on small and large scales. Comparisons are made for galaxy samples matched in redshift, r-band luminosity, [O III] luminosity, and also the position in groups (central or satellite). We find that Type. 2 AGNs and normal galaxies reside in similar environments. Type. 1 and Type. 2 AGNs have similar clustering properties on large scales (greater than or similar to 1 h(-1) Mpc), but at scales smaller than 100 h(-1) kpc, Type. 2s have significantly more neighbors than Type. 1s (3.09 +/- 0.69 times more for central AGNs at less than or similar to 30 h(-1) kpc). These results suggest that Type. 1 and Type. 2 AGNs are hosted by halos of similar masses, as can also be seen directly from the mass distributions of their host groups (similar to 10(12) h(-1) M. for centrals and similar to 10(13) h(-1) M-circle dot for satellites). Type. 2s have significantly more satellites around them, and the distribution of their satellites is also more centrally concentrated. The host galaxies of both types of AGNs have similar optical properties, but their infrared colors are significantly different. Our results suggest that the simple unified model based solely on torus orientation is not sufficient, but that galaxy interactions in dark matter halos must have played an important role in the formation of the dust structure, which obscures AGNs.

Funding Project973 program[2015CB857005] ; 973 program[2012CB821804] ; NSFC[11522324] ; NSFC[11421303] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09010400] ; Fundamental Research Funds for the Central Universities ; NSF[AST-1517528]
Funding Organization973 program[2015CB857005, 2012CB821804] ; NSFC[11522324, 11421303] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09010400] ; Fundamental Research Funds for the Central Universities ; NSF[AST-1517528]
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000389243600002
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordACTIVE GALACTIC NUCLEI ; DIGITAL SKY SURVEY ; SUPERMASSIVE BLACK-HOLES ; DARK-MATTER HALOES ; CROSS-CORRELATION FUNCTION ; EMISSION-LINE SPECTRA ; LUMINOUS RED GALAXIES ; STAR-FORMATION RATES ; X-RAY ; SEYFERT-GALAXIES
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9839
Collection丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
Corresponding AuthorJiang, N
Affiliation1.Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, The University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China
2.Department of Astronomy,University of Massachusetts, Amherst MA 01003-9305, USA
3.Physics Department and Center for Astrophysics, Tsinghua University, Beijing 10084, China
4.Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
6.Polar Research Institute of China, 451 Jinqiao Road, Shanghai, 200136, China
Recommended Citation
GB/T 7714
Jiang, N,Wang, HY,Mo, HJ,et al. DIFFERENCES IN HALO-SCALE ENVIRONMENTS BETWEEN TYPE 1 AND TYPE 2 AGNs AT LOW REDSHIFT[J]. ASTROPHYSICAL JOURNAL,2016,832(2).
APA Jiang, N,Wang, HY,Mo, HJ,Dong XB,Wang, TG,&Zhou, HY.(2016).DIFFERENCES IN HALO-SCALE ENVIRONMENTS BETWEEN TYPE 1 AND TYPE 2 AGNs AT LOW REDSHIFT.ASTROPHYSICAL JOURNAL,832(2).
MLA Jiang, N,et al."DIFFERENCES IN HALO-SCALE ENVIRONMENTS BETWEEN TYPE 1 AND TYPE 2 AGNs AT LOW REDSHIFT".ASTROPHYSICAL JOURNAL 832.2(2016).
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