1999ApJ...517L..77B

Query : 1999ApJ...517L..77B

1999ApJ...517L..77B - Astrophys. J., 517, L77-L80 (1999/June-1)

On the origin of polarization near the Lyman edge in quasars.

BELOBORODOV A.M. and POUTANEN J.

Abstract (from CDS):

Optical/UV radiation from accretion disks in quasars is likely to be partly scattered by a hot plasma enveloping the disk. We investigate whether the scattering may produce the steep rises in polarization observed blueward of the Lyman limit in some quasars. We suggest and assess two models. In the first model, primary disk radiation with a Lyman edge in absorption passes through a static ionized ``skin'' covering the disk, which has a temperature kT∼3 keV and a Thomson optical depth τT∼1. Electron scattering in the skin smears out the edge and produces a steep rise in polarization at λ<912 Å. In the second model, the scattering occurs in a hot coronal plasma outflowing from the disk with a mildly relativistic velocity. We find that the second model better explains the data. The ability of the models to fit the observed rises in polarization is illustrated with the quasar PG 1630+377.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Galaxies: Active - Polarization - Galaxies: Quasars: Individual: Alphanumeric: PG 1630+377 - Radiative Transfer - Ultraviolet: Galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO B1630+3744 QSO 16 32 01.1117931960 +37 37 49.980505332   16.50 16.30     ~ 183 0

Query : 1999ApJ...517L..77B

Basic data :
QSO B1630+3744 -- Quasar
Other object types: otypes_help 		QSO (2011MNRAS,QSO,...), X (2007AJ,1RXS,...), * (FBS,USNO,...), UV (GALEX,KUV,...), Q? ([CCS88],[CSC85]), G (2019ApJS,[PBT2019]), Opt (LAMOST,SDSS), AGN (2007AJ), NIR (2MASS)
ICRS coord. (ep=J2000) : 		16 32 01.1117931960 +37 37 49.980505332 (Optical) [ 0.0219 0.0276 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		16 30 15.1077750464 +37 44 08.817717443 [ 0.0219 0.0276 90 ]
Gal coord. (ep=J2000) : 		060.3421039706505 +42.9393456017972 [ 0.0219 0.0276 90 ]
Proper motions mas/yr : 		-0.009 -0.061 [0.027 0.036 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 215687 [51] / z(spectroscopic) 1.47568 [0.00017] / cz 442397.7 [51.0]
   (Opt) C 2012ApJS..203...21A
Morphological type: 		?... D ~
Fluxes (11) :
B 16.50 [~] D 2010A&A...518A..10V
V 16.30 [~] D 2010A&A...518A..10V
G 15.840618 [0.003440] C 2020yCat.1350....0G
J 14.951 [0.038] C 2010AJ....139.2360S
H 14.292 [0.043] C 2010AJ....139.2360S
K 14.090 [0.055] C 2010AJ....139.2360S
u (AB) 16.1456 [0.0167] C 2020ApJS..250....8L
g (AB) 16.0261 [0.0187] C 2020ApJS..250....8L
r (AB) 15.9253 [0.0148] C 2020ApJS..250....8L
i (AB) 15.8003 [0.0148] C 2020ApJS..250....8L
z (AB) 15.7950 [0.0269] C 2020ApJS..250....8L
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Identifiers (35) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B1630+3744 PG 1630+377 USNO-A2.0 1275-08972271 [VV2000] J163201.1+373749
FBS 1630+377 PG 1630+37 2XMM J163201.1+373749 [VV2003] J163201.1+373749
FBS B 138 QSO B1630+377 3XMM J163201.0+373749 [VV2006] J163201.1+373749
GALEX J163201.1+373749 QSO J1632+3737 2XMMi J163201.1+373749 [VV2010] J163201.1+373749
KUV 16303+3744 1RXS J163159.9+373748 [BDW2002] q1630+3744 [VV96] J163201.1+373749
KUV 433-16 2RXS J163159.8+373746 [CCS88] 1630.3+3744 [VV98] J163201.1+373749
LAMOST J163201.12+373750.01 SDSS J163201.11+373750.0 [CSC85] 1630.3+3774 Gaia DR2 1331085410995536640
2MASS J16320111+3737500 SDSS J163201.11+373749.9 [HB93] 1630+377 Gaia DR3 1331085410995536640
PG 1630+376 TIC 257091811 [PBT2019] 8816

References (183 between 1850 and 2026) (Total 183)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 11    PM : 2   

   

Observing logs
ISO : 3    IUE : 4    XMM : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : QSO B1630+3744

Link by name to the catalogue in VizieR :

FBS 1630+377 FBS B 138 GALEX J163201.1+373749 2MASS J16320111+3737500 PG 1630+376
PG 1630+377 PG 1630+37 1RXS J163159.9+373748 SDSS J163201.11+373750.0 SDSS J163201.11+373749.9
USNO-A2.0 1275-08972271 Gaia DR2 1331085410995536640 Gaia DR3 1331085410995536640

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