Incidence of the host galaxy on the measured optical linear polarization of blazars

We study the incidence of the underlying host galaxy light on the measured optical linear polarization of blazars. Our methodology consists of the implementation of simulated observations obtained under different atmospheric conditions, which are characterized by the Gaussian σ of the seeing functio...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Andruchow, Ileana, Cellone, Sergio Aldo, Romero, Gustavo Esteban
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Ciencias Astronómicas
BL Lacertae objects: individual: PKS 0521-365
Galaxies: active
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84155
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84155
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
BL Lacertae objects: individual: PKS 0521-365
Galaxies: active
spellingShingle Ciencias Astronómicas
BL Lacertae objects: individual: PKS 0521-365
Galaxies: active
Andruchow, Ileana
Cellone, Sergio Aldo
Romero, Gustavo Esteban
Incidence of the host galaxy on the measured optical linear polarization of blazars
topic_facet Ciencias Astronómicas
BL Lacertae objects: individual: PKS 0521-365
Galaxies: active
description We study the incidence of the underlying host galaxy light on the measured optical linear polarization of blazars. Our methodology consists of the implementation of simulated observations obtained under different atmospheric conditions, which are characterized by the Gaussian σ of the seeing function. The simulated host plus active nucleus systems span broad ranges in luminosity, structural properties, redshift and polarization; this allows us to test the response of the results against each of these parameters. Our simulations show that, as expected, the measured polarization is always lower than the intrinsic value, due to the contamination by non-polarized star light from the host. This effect is more significant when the host is brighter than the active nucleus, and/or a large photometric aperture is used. On the other hand, if seeing changes along the observing time under certain particular conditions, spurious microvariability could be obtained, especially when using a small photometric aperture. We thus give some recommendations in order to minimize both unwanted effects, as well as basic guidelines to estimate a lower limit of the true (nuclear) polarization. As an example, we apply the results of our simulations to real polarimetric observations, with high temporal resolution, of the blazar PKS 0521-365.
format Articulo
Articulo
author Andruchow, Ileana
Cellone, Sergio Aldo
Romero, Gustavo Esteban
author_facet Andruchow, Ileana
Cellone, Sergio Aldo
Romero, Gustavo Esteban
author_sort Andruchow, Ileana
title Incidence of the host galaxy on the measured optical linear polarization of blazars
title_short Incidence of the host galaxy on the measured optical linear polarization of blazars
title_full Incidence of the host galaxy on the measured optical linear polarization of blazars
title_fullStr Incidence of the host galaxy on the measured optical linear polarization of blazars
title_full_unstemmed Incidence of the host galaxy on the measured optical linear polarization of blazars
title_sort incidence of the host galaxy on the measured optical linear polarization of blazars
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/84155
work_keys_str_mv AT andruchowileana incidenceofthehostgalaxyonthemeasuredopticallinearpolarizationofblazars
AT cellonesergioaldo incidenceofthehostgalaxyonthemeasuredopticallinearpolarizationofblazars
AT romerogustavoesteban incidenceofthehostgalaxyonthemeasuredopticallinearpolarizationofblazars
bdutipo_str Repositorios
_version_ 1764820488426618887

Ejemplares similares