2011ApJ...735...81H


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.08CET16:36:54

2011ApJ...735...81H - Astrophys. J., 735, 81 (2011/July-2)

Oblique shocks as the origin of radio to gamma-ray variability in active galactic nuclei.

HUGHES P.A., ALLER M.F. and ALLER H.D.

Abstract (from CDS):

The "shock in jet" model for centimeter-waveband blazar variability is revisited, allowing for arbitrary shock orientation with respect to the jet flow direction, and both random and ordered magnetic field. It is shown that oblique shocks can explain events with swings in polarization position angle much less than the 90° associated with transverse structures, while retaining the general characteristics of outbursts, including spectral behavior and level of peak percentage polarization. Models dominated by a force-free, minimum energy magnetic field configuration (essentially helical) display a shallow rise in percentage polarization and frequency-dependent swing in polarization position angle not in agreement with the results of single-dish monitoring observations, implying that the field is predominantly random in the quiescent state. Outbursts well explained by the "shock in jet" model are present during γ-ray flaring in several sources, supporting the idea that shock events are responsible for activity from the radio to γ-ray bands.

Abstract Copyright:

Journal keyword(s): galaxies: jets - magnetic fields - polarization - radiation mechanisms: non-thermal - shock waves

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 1949 1
2 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5251 1
3 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2641 2
4 QSO J1512-0906 QSO 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1123 1
5 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78   ~ 958 1
6 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 786 1
7 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 1976 1

    Equat.    Gal    SGal    Ecl

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2019.12.08-16:36:54

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