NAOC Open IR  > 星系宇宙学研究部
The physical connections among infrared QSOs, palomar-green QSOs, and narrow-line Seyfert 1 galaxies
Hao, CN; Xia, XY; Mao, SD; Wu, H; Deng, ZG
2005-05-20
Source PublicationASTROPHYSICAL JOURNAL
Volume625Issue:1Pages:78-88
AbstractWe study the properties of infrared- selected QSOs ( IR QSOs), optically selected Palomar- Green QSOs ( PGQSOs), and narrow- line Seyfert 1 galaxies ( NLS1s). We compare their properties from the IR to the optical and examine various correlations among the black hole mass, accretion rate, star formation rate, and optical and IR luminosities. We find that the IR excess in IR QSOs is mostly in the far- IR, and their IR spectral indices suggest that the excess emission is from low- temperature dust heated by starbursts rather than active galactic nuclei ( AGNs). The IR excess is therefore a useful criterion to separate the relative contributions of starbursts and AGNs. We further find a tight correlation between the star formation rate and the accretion rate of central AGNs for IR QSOs. The ratio of the star formation rate and the accretion rate is about several hundred for IR QSOs but decreases with the central black hole mass. This shows that the tight correlation between the stellar mass and the central black hole mass is preserved in massive starbursts during violent mergers. We suggest that the higher Eddington ratios of NLS1s and IR QSOs imply that they are in the early stage of evolution toward classical Seyfert 1 galaxies and QSOs, respectively.
KeywordGalaxies : Active Galaxies : Evolution Galaxies : Interactions Galaxies : Ism Galaxies : Starburst Quasars : General
Indexed BySCI
Language英语
WOS IDWOS:000229046600008
Citation statistics
Cited Times:59[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8149
Collection星系宇宙学研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Tianjin Normal Univ, Dept Phys, Tianjin 300074, Peoples R China
3.Univ Manchester, Jodrell Bank Observ, Macclesfield SK11 9DL, Cheshire, England
4.Chinese Acad Sci, Grad Sch, Coll Phys Sci, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Hao, CN,Xia, XY,Mao, SD,et al. The physical connections among infrared QSOs, palomar-green QSOs, and narrow-line Seyfert 1 galaxies[J]. ASTROPHYSICAL JOURNAL,2005,625(1):78-88.
APA Hao, CN,Xia, XY,Mao, SD,Wu, H,&Deng, ZG.(2005).The physical connections among infrared QSOs, palomar-green QSOs, and narrow-line Seyfert 1 galaxies.ASTROPHYSICAL JOURNAL,625(1),78-88.
MLA Hao, CN,et al."The physical connections among infrared QSOs, palomar-green QSOs, and narrow-line Seyfert 1 galaxies".ASTROPHYSICAL JOURNAL 625.1(2005):78-88.
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