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A possible signature of connection between blazars and seyfert galaxies
Liang EW(梁恩维)1,2,3; Liang, EW (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2003
Volume55Issue:5Pages:947-951
DOI10.1093/pasj/55.5.947
Contribution Rank第1完成单位
Indexed BySCI
KeywordGalaxies : Active Galaxies : Bl Lacs Ualaxies : Evolution Galaxies : Nuclei Galaxies : Seyfert
AbstractThe accretion rates (M) and their correlation with cosmological redshifts for a sample of blazars and Seyfert glaxies are presented. The sample includes 77 blazars (28 FSRQs, 26 LBLs, and 23 HBLs) and 60 Seyfert galaxies, of which the extended spectral energy distribution information and redshifts are available. Within the framework of accreting black holes, the accretion rates for these sources were estimated based on their bolometric luminosities. The result shows that the accretion rates are significantly different for each subclass of the blazars and Seyfert galaxies. Their averages are, respectively, 50.2, 17.0, 1.0, 0.1 Mcircle dotyr(-1) for the FSRQs, LBLs, HBLs, and the Seyfert galaxies. exhibitin a well descending sequence of FSRQs-LBLs-HBLs-Seyfert galaxies. They are strongly correlated with the redshifts for both blazars and Seyfert galaxies. The linear correlation coefficients are 0.81 and 0.68 with a chance probability of p < 0.0001, respectively. A plot of M-z shows that the blazars and the Seyfert Galaxies distribute in a distinguishable regions with a connection at z similar to 0.7, and almost all the sources lie in a narrow region of z(1.40) less than or equal to M less than or equal to 250 z(1.40), illustrating a strong correlation between the two quantities for the whole sample. The regression line is M = (14.5 +/- 1.2)z(1.40 +/- 0.06) M-circle dot yr(-1) with a linear coefficient of 0.93 and a chance probability of p < 0.0001. These results confirm D'Elia and Cavaliere's argument and expand this argument to Seyfert galaxies, suggesting a connection between blazars and Seyfert galaxies. This connection might imply that the two classes are on the same evolutionary sequence. Although the Correlations of the data are formally solid, the conclusion may be affected by one source of considerable uncertainty at the data level, which is also discussed.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6264
URL查看原文
Archive Date2003-12-16
WOS IDWOS:000186281000009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSPECTRAL ENERGY-DISTRIBUTIONS ; ACTIVE GALACTIC NUCLEI ; RAY-LOUD BLAZARS ; BL-LACERTAE OBJECTS ; BLACK-HOLE MASSES ; DOPPLER FACTORS ; RADIO QUASARS ; ACCRETION ; MODEL ; QUIET
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6966
Collection星系研究组
Corresponding AuthorLiang, EW (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, P. R. China
2.Physics Department, Guangxi University, Nanning 530004, P. R. China
3.Astronomy Department, Nanjing University, Nanjing 210093, P. R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liang EW,Liang, EW . A possible signature of connection between blazars and seyfert galaxies[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2003,55(5):947-951.
APA Liang EW,&Liang, EW .(2003).A possible signature of connection between blazars and seyfert galaxies.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,55(5),947-951.
MLA Liang EW,et al."A possible signature of connection between blazars and seyfert galaxies".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 55.5(2003):947-951.
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