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
Keyword(s):  
Radio Galaxies ◽  
Bl Lacertae Objects ◽  
Bl Lacertae ◽  
New Evidence

scholarly journals Outflow Angles and Bulk Lorentz Factors for Different Categories of AGN

1997 ◽  
Vol 163 ◽  
pp. 695-696 ◽  
Author(s):  
Erick. J. Guerra ◽  
Ruth A. Daly
Keyword(s):  
Lorentz Factor ◽  
Radio Galaxies ◽  
Line Of Sight ◽  
Radio Sources ◽  
Bl Lacertae Objects ◽  
Bl Lacertae ◽  
High Polarization ◽  
Inverse Compton ◽  
Doppler Factor ◽  
Bl Lacs

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).

scholarly journals Doppler factors, Lorentz factors, and viewing angles for quasars, BL Lacertae objects and radio galaxies

2009 ◽  
Vol 498 (3) ◽  
pp. 723-723 ◽  
Author(s):  
T. Hovatta ◽  
E. Valtaoja ◽  
M. Tornikoski ◽  
A. Lähteenmäki
Keyword(s):  
Radio Galaxies ◽  
Bl Lacertae Objects ◽  
Bl Lacertae

Correlation between Eddington Ratios and Broad-Line Luminosities in Flat-Spectrum Radio Quasars, BL Lacertae Objects, and Radio Galaxies

2007 ◽  
Vol 133 (5) ◽  
pp. 2187-2191 ◽  
Author(s):  
H. Dai ◽  
G. Z. Xie ◽  
S. B. Zhou ◽  
H. Z. Li ◽  
L. E. Chen ◽  
...  
Keyword(s):  
Radio Galaxies ◽  
Broad Line ◽  
Bl Lacertae Objects ◽  
Bl Lacertae ◽  
Spectrum Radio

scholarly journals Unifying B2 radio galaxies with BL Lacertae objects

2003 ◽  
Vol 338 (1) ◽  
pp. 176-188 ◽  
Author(s):  
M. J. Hardcastle ◽  
D. M. Worrall ◽  
M. Birkinshaw ◽  
C. M. Canosa
Keyword(s):  
Radio Galaxies ◽  
Bl Lacertae Objects ◽  
Bl Lacertae

scholarly journals Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies

2008 ◽  
Vol 494 (2) ◽  
pp. 527-537 ◽  
Author(s):  
T. Hovatta ◽  
E. Valtaoja ◽  
M. Tornikoski ◽  
A. Lähteenmäki
Keyword(s):  
Radio Galaxies ◽  
Bl Lacertae Objects ◽  
Bl Lacertae

scholarly journals Astrophysical implications of binary black holes in BL Lacertae objects

2002 ◽  
Vol 388 (2) ◽  
pp. 470-476 ◽  
Author(s):  
F. De Paolis ◽  
G. Ingrosso ◽  
A. A. Nucita
Keyword(s):  
Black Holes ◽  
Bl Lacertae Objects ◽  
Binary Black Holes ◽  
Bl Lacertae

scholarly journals Longterm optical monitoring of bright BL Lacertae objects with ATOM: Spectral variability and multiwavelength correlations

2014 ◽  
Vol 573 ◽  
pp. A69 ◽  
Author(s):  
Alicja Wierzcholska ◽  
Michał Ostrowski ◽  
Łukasz Stawarz ◽  
Stefan Wagner ◽  
Marcus Hauser
Keyword(s):  
Optical Monitoring ◽  
Spectral Variability ◽  
Bl Lacertae Objects ◽  
Bl Lacertae
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