Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Zhao-Hua Xie"'
Publikováno v:
Publications of the Astronomical Society of the Pacific. 120:477-486
We study the relationship between the broad-line luminosity LBLRLBLR and the intrinsic Eddington accretion ratios m˙ for a sample of 17 flat-spectrum radio quasars (FSRQs), 16 BL Lac objects, and 11 FRI and nine FRII radio galaxies, for which the ab
Autor:
Zhou SB(周曙白), Zhao-Hua Xie, Ji-Yang Ren, Li Ma, Dong-Cheng Mei, Luo-En Chen, Hui Wu, Guang-Zhong Xie
Publikováno v:
Chinese Journal of Astronomy and Astrophysics. 7:345-352
We have collected a sample of 70 BL Lacs (33 radio-selected BL Lacs and 37 X-ray selected BL Lacs) with multi-waveband data for investigating the classifying criteria of BL Lacertae Objects. For each source, we estimate its luminosities in radio, opt
Publikováno v:
International Journal of Modern Physics D. 15:295-304
On the basis of the beaming model, we have derived a relation between the observed polarization (P ob ) and the observed magnitude (m ob ), log P ob = -0.4(k-1)m ob +C, which indicates that the observed polarization is anti-correlated with the observ
Autor:
Luo-En Chen, Li-Sheng Mao, Li Ma, Huai-Zhen Li, Hong Dai, Zhou SB(周曙白), Zhao-Hua Xie, Guang-Zhong Xie
Publikováno v:
Chinese Journal of Astronomy and Astrophysics. 5:463-470
Black hole mass is one of the fundamental physical parameters of active galactic nuclei (AGNs), for which many methods of estimation have been proposed. One set of methods assumes that the broad-line region (BLR) is gravitationally bound by the centr
Autor:
L.Z. Ma, Guang-Zhong Xie, L. Chen, Zhao XH(赵晓红), Cha GW(茶光伟), Zhou SB(周曙白), Zhao-Hua Xie, H. T. Liu
Publikováno v:
International Journal of Modern Physics D. 14:1173-1184
The new results of spectrophotometry, and X-ray imaging spectroscopy observations for the high-polarization, radio-loud and Gev gamma-ray-loud blazar PKS 1510-089 have been observed. The main results show that: (1) A double-horned broad Hβ line in t
Publikováno v:
Publications of the Astronomical Society of Japan. 57:183-186
The black hole mass, along with the ratio of the accretion rate to the Eddington accretion rate, is a fundamental parameter of active galactic nuclei. Using our new method to estimate the black hole mass, we developed our sample and estimated black h
Publikováno v:
International Journal of Modern Physics D. 13:659-668
In this paper, we have collected the available observation data of BL Lac S5 0716+714 in I-band from published literature during 1994 to 2000. The light curve shows S5 0716+714 is very active and very complicated non-sinusoidal variations. We studied
Publikováno v:
The Astronomical Journal. 126:2108-2113
We have compiled sample of 17 GeV gamma-ray-loud blazars, for which rapid optical variability and gamma-ray fluxes are well observed, from the literature. We derive estimates of the masses, the minimum Kerr parameters a(min), and the size of the emis
Publikováno v:
Publications of the Astronomical Society of Japan. 55:933-937
Considering the Klein-Nishina effects for high-energy gamma-ray emissions, we derived a corrected form of the basic Elliot-Shapiro formula. Two new lower limits to the time scales of the variability expected from an accreting Schwarzschild black hole
Publikováno v:
Chinese Journal of Astronomy and Astrophysics. 1:494-500
Using the HST observation data of BL Lac objects by Urry et al. and gamma-ray observation data, we find that there is a correlation between Fgamma and F-O(nuclei) for gamma-ray-loud BL Lac objects (correlation coefficients: gamma = 0.63, p = 4.0 x 10