Rapid variability in the southern blazar PKS 0521-365

We present an intrinsic interpretation for the recently reported radio variability in the southern blazar PKS 0521-365. A shockedjet model can account for the quasi-periodical variations in the flux density of the source by means of inhomogeneities in the electron density with a quasi-periodic distr...

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Autores principales: Romero, Gustavo Esteban, Combi, Jorge Ariel, Vucetich, Héctor
Formato: Articulo
Lenguaje:Inglés
Publicado: 1995
Materias:
Ciencias Astronómicas
Brightness temperature
Position angle
Shock propagation
Polarization position
Field orientation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/145833
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-145833
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Brightness temperature
Position angle
Shock propagation
Polarization position
Field orientation
spellingShingle Ciencias Astronómicas
Brightness temperature
Position angle
Shock propagation
Polarization position
Field orientation
Romero, Gustavo Esteban
Combi, Jorge Ariel
Vucetich, Héctor
Rapid variability in the southern blazar PKS 0521-365
topic_facet Ciencias Astronómicas
Brightness temperature
Position angle
Shock propagation
Polarization position
Field orientation
description We present an intrinsic interpretation for the recently reported radio variability in the southern blazar PKS 0521-365. A shockedjet model can account for the quasi-periodical variations in the flux density of the source by means of inhomogeneities in the electron density with a quasi-periodic distribution along a jet in which a relativistic strong shock is propagating. These inhomogeneities are naturally produced by the effects of Kelvin-Helmholtz instabilities in the hypersonic parsec scale jet. The quasi-linear evolution of the polarization position angle can be understood as an effect of the “illumination” of successive cross sections with different mean field orientation or as a consequence of the shock propagation through a turbulent region in the jet. The high brightness temperature problem introduced by the short timescale varibility is solved invocating relativistic boosting with a moderately small viewing angle in agreement with the known structure of the source. In this context, several parameters are estimated.
format Articulo
Articulo
author Romero, Gustavo Esteban
Combi, Jorge Ariel
Vucetich, Héctor
author_facet Romero, Gustavo Esteban
Combi, Jorge Ariel
Vucetich, Héctor
author_sort Romero, Gustavo Esteban
title Rapid variability in the southern blazar PKS 0521-365
title_short Rapid variability in the southern blazar PKS 0521-365
title_full Rapid variability in the southern blazar PKS 0521-365
title_fullStr Rapid variability in the southern blazar PKS 0521-365
title_full_unstemmed Rapid variability in the southern blazar PKS 0521-365
title_sort rapid variability in the southern blazar pks 0521-365
publishDate 1995
url http://sedici.unlp.edu.ar/handle/10915/145833
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AT combijorgeariel rapidvariabilityinthesouthernblazarpks0521365
AT vucetichhector rapidvariabilityinthesouthernblazarpks0521365
bdutipo_str Repositorios
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