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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.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2003
卷号55期号:5页码:947-951
DOI10.1093/pasj/55.5.947
产权排序第1完成单位
收录类别SCI
关键词Galaxies : Active Galaxies : Bl Lacs Ualaxies : Evolution Galaxies : Nuclei Galaxies : Seyfert
摘要The 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2003-12-16
WOS记录号WOS:000186281000009
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SPECTRAL 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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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6966
专题星系研究组
通讯作者Liang, EW (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位1.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
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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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