scholarly journals Polarization of Quasars: Resonant Line Scattering in the Broad Absorption Line Region

2007 ◽  
Vol 168 (2) ◽  
pp. 195-212 ◽  
Author(s):  
Hui‐Yuan Wang ◽  
Ting‐Gui Wang ◽  
Jun‐Xian Wang
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
Resonant Line ◽  
Broad Absorption Line ◽  
Line Region

Kinematics of the broad absorption line region in QSOs: Rotation and random motion

2009 ◽  
Vol 53 (7-10) ◽  
pp. 179-185 ◽  
Author(s):  
E. Lyratzi ◽  
L.Č. Popović ◽  
E. Danezis ◽  
M.S. Dimitrijević ◽  
A. Antoniou
Keyword(s):  
Absorption Line ◽  
Random Motion ◽  
Broad Absorption ◽  
Broad Absorption Line ◽  
Line Region

Polarization of Quasars: Electron Scattering in the Broad Absorption Line Region

2005 ◽  
Vol 634 (1) ◽  
pp. 149-154 ◽  
Author(s):  
Hui‐Yuan Wang ◽  
Ting‐Gui Wang ◽  
Jun‐Xian Wang
Keyword(s):  
Absorption Line ◽  
Electron Scattering ◽  
Broad Absorption ◽  
Broad Absorption Line ◽  
Line Region

scholarly journals Broad Absorption Line QSOs

1986 ◽  
Vol 119 ◽  
pp. 317-330 ◽  
Author(s):  
David A. Turnshek
Keyword(s):  
Emission Line ◽  
Absorption Line ◽  
Observational Constraints ◽  
Broad Absorption ◽  
Central Source ◽  
Broad Absorption Line ◽  
Broad Emission ◽  
Line Region ◽  
High Ionization ◽  
Broad Emission Line

Observational constraints on models for broad absorption line (BAL) QSOs are discussed. The picture which emerges is one in which the broad absorption line region (BALR) contributes to the broad emission line region (ELR) as a high ionization component. Depending on QSO luminosity, the limits on the distance of the BALR from the central source are 1–1000 pc. A highly metal enriched and disk-like geometry for the region is indicated. The similarity between the absorption in some radio quiet BAL QSOs and the associated complexes of absorption in some radio loud QSOs may indicate that the BALR outflow can affect the region surrounding a QSO out to distances in excess of several hundred kpc.

scholarly journals Gaia-assisted discovery of a detached low-ionisation BAL quasar with very large ejection velocities

2020 ◽  
Vol 634 ◽  
pp. A111 ◽  
Author(s):  
J. P. U. Fynbo ◽  
P. Møller ◽  
K. E. Heintz ◽  
J. N. Burchett ◽  
L. Christensen ◽  
...  
Keyword(s):  
Emission Line ◽  
Absorption Line ◽  
Emission Lines ◽  
Broad Absorption ◽  
Broad Absorption Line ◽  
Red Edge ◽  
First Case ◽  
Bl Lac ◽  
Spatially Extended ◽  
Extended Emission

We report on the discovery of a peculiar broad absorption line (BAL) quasar identified in our Gaia-assisted survey of red quasars. The systemic redshift of this quasar was difficult to establish because of the absence of conspicuous emission lines. Based on deep and broad BAL troughs of at least Si IV, C IV, and Al III, a redshift of z = 2.41 was established under the assumption that the systemic redshift can be inferred from the red edge of the BAL troughs. However, we observe a weak and spatially extended emission line at 4450 Å that is most likely due to Lyman-α emission, which implies a systemic redshift of z = 2.66 if correctly identified. There is also evidence for the onset of Lyman-α forest absorption bluewards of 4450 Å and evidence for Hα emission in the K band consistent with a systemic redshift of z = 2.66. If this redshift is correct, the quasar is an extreme example of a detached low-ionisation BAL quasar. The BALs must originate from material moving with very large velocities ranging from 22 000 km s−1 to 40 000 km s−1. To our knowledge, this is the first case of a systemic-redshift measurement based on extended Lyman-α emission for a BAL quasar. This method could also be useful in cases of sufficiently distant BL Lac quasars without systemic-redshift information.

scholarly journals Multifrequency VLBI Observations of the Broad Absorption Line Quasar J1020 4320: Recently Restarted Jet Activity?

2013 ◽  
Vol 65 (3) ◽  
pp. 57 ◽  
Author(s):  
Akihiro Doi ◽  
Yasuhiro Murata ◽  
Nanako Mochizuki ◽  
Hiroshi Takeuchi ◽  
Keiichi Asada ◽  
...  
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
Broad Absorption Line ◽  
Vlbi Observations

scholarly journals The orientation and polarization of broad absorption line quasars★

2012 ◽  
Vol 428 (2) ◽  
pp. 1565-1578 ◽  
Author(s):  
M. A. DiPompeo ◽  
M. S. Brotherton ◽  
C. De Breuck
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
Broad Absorption Line

Serendipitous Discovery of a Broad Absorption Line QSO at [CLC][ITAL]z[/ITAL][/CLC] = 2.169

1998 ◽  
Vol 115 (3) ◽  
pp. 890-894 ◽  
Author(s):  
Gabriela Canalizo ◽  
Alan Stockton ◽  
Katherine C. Roth
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
Broad Absorption Line
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