New Evidence for the Unified Scheme of BL Lacertae Objects and FR I Radio Galaxies

2001 ◽  
Vol 548 (1) ◽  
pp. 244-248 ◽  
Author(s):  
J. M. Bai ◽  
Myung Gyoon Lee
1997 ◽  
Vol 163 ◽  
pp. 695-696 ◽  
Author(s):  
Erick. J. Guerra ◽  
Ruth A. Daly

AbstractRelativistic outflows from AGN can be parameterized by θ, the angle subtended by the direction of the outflow and the line of sight to the observer, and γ, the bulk Lorentz factor of the outflow. The Doppler factor, δ, and the apparent speed in the plane of the sky, βapp, are combinations of θ and γ. The Doppler factor can be estimated using either the equipartition Doppler factor, δeq (Readhead 1994), or the inverse Compton Doppler factor, δIC. These Doppler factor estimates are combined with observed βapp to solve for θ and γ for different categories of AGN.Ghisellini et al. (1993) compute δIC for 105 compact radio sources, and Güijosa & Daly (1996) compute δeq for the same sample. Daly, Guerra, & Güijosa (1996) estimate θ and γ for the 43 sources that have βapp listed by Vermeulen & Cohen (1994) and δeq computed by Güijosa & Daly (1996).Solutions and errors for θ and γ are presented in Figures 1 and 2 using δeq and δIC respectively. Guerra & Daly (1996) discuss these estimates and errors in greater detail. These AGN fall into the following categories: BL Lacertae objects (BL Lacs), core-dominated high-polarization quasars (CDHPQ), core-dominated low-polarization quasars (CDLPQ), core-dominated quasars with no polarization information (CDQ(NPI)), lobe-dominated quasars (LDQ), and radio galaxies (RG).


2009 ◽  
Vol 498 (3) ◽  
pp. 723-723 ◽  
Author(s):  
T. Hovatta ◽  
E. Valtaoja ◽  
M. Tornikoski ◽  
A. Lähteenmäki

2007 ◽  
Vol 133 (5) ◽  
pp. 2187-2191 ◽  
Author(s):  
H. Dai ◽  
G. Z. Xie ◽  
S. B. Zhou ◽  
H. Z. Li ◽  
L. E. Chen ◽  
...  

2003 ◽  
Vol 338 (1) ◽  
pp. 176-188 ◽  
Author(s):  
M. J. Hardcastle ◽  
D. M. Worrall ◽  
M. Birkinshaw ◽  
C. M. Canosa

2008 ◽  
Vol 494 (2) ◽  
pp. 527-537 ◽  
Author(s):  
T. Hovatta ◽  
E. Valtaoja ◽  
M. Tornikoski ◽  
A. Lähteenmäki

2002 ◽  
Vol 388 (2) ◽  
pp. 470-476 ◽  
Author(s):  
F. De Paolis ◽  
G. Ingrosso ◽  
A. A. Nucita

2014 ◽  
Vol 573 ◽  
pp. A69 ◽  
Author(s):  
Alicja Wierzcholska ◽  
Michał Ostrowski ◽  
Łukasz Stawarz ◽  
Stefan Wagner ◽  
Marcus Hauser

Sign in / Sign up

Export Citation Format

Share Document