Radio Luminosity Function of Flat-spectrum Radio Quasars

We present the radio luminosity function (LF) of flat-spectrum radio quasars (FSRQ), using the the largest and most complete sample to date. Cross-matching between the FIRST 20 cm and GB6 6 cm radio surveys, we find 638 flat-spectrum radio sources above 220 mJy at 1.4 GHz; of these, 327 are are clas...

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Autores principales: Mao, Peiyuan, Urry, C. Megan, Marchesini, Ezequiel Joaquín, Landoni, Marco, Massaro, Francesco, Ajello, Marco
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Astronómicas
cosmology: observations
galaxies: active
galaxies: jets
quasars: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87611
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87611
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
cosmology: observations
galaxies: active
galaxies: jets
quasars: general
spellingShingle Ciencias Astronómicas
cosmology: observations
galaxies: active
galaxies: jets
quasars: general
Mao, Peiyuan
Urry, C. Megan
Marchesini, Ezequiel Joaquín
Landoni, Marco
Massaro, Francesco
Ajello, Marco
Radio Luminosity Function of Flat-spectrum Radio Quasars
topic_facet Ciencias Astronómicas
cosmology: observations
galaxies: active
galaxies: jets
quasars: general
description We present the radio luminosity function (LF) of flat-spectrum radio quasars (FSRQ), using the the largest and most complete sample to date. Cross-matching between the FIRST 20 cm and GB6 6 cm radio surveys, we find 638 flat-spectrum radio sources above 220 mJy at 1.4 GHz; of these, 327 are are classified and verified using optical spectroscopy data, mainly from Sloan Digital Sky Survey Data Release 12. We also considered flat-spectrum radio sources that lack both literature references and optical spectroscopy, and we identified 12 out of the 43 such sources to potentially be FSRQs, using their WISE colors. From the fully identified sample of 242 FSRQs, we derived the radio LF and cosmic evolution of blazars at 1.4 GHz, finding good agreement with previous work at 5 GHz. The number density of FSRQs increases dramatically to a redshift of z ∼ 2 and then declines for higher redshifts. Furthermore, the redshift at which the quasar density peaks is clearly dependent on luminosity, with more luminous sources peaking at higher redshifts. The approximate best-fit LF for a luminosity-dependent evolutionary model is a broken power-law with slopes ∼0.7 and ∼1.7 below and above the break luminosity, log L<sub>1.4</sub> ∼ 43.8 erg s<sup>-1</sup>, respectively.
format Articulo
Articulo
author Mao, Peiyuan
Urry, C. Megan
Marchesini, Ezequiel Joaquín
Landoni, Marco
Massaro, Francesco
Ajello, Marco
author_facet Mao, Peiyuan
Urry, C. Megan
Marchesini, Ezequiel Joaquín
Landoni, Marco
Massaro, Francesco
Ajello, Marco
author_sort Mao, Peiyuan
title Radio Luminosity Function of Flat-spectrum Radio Quasars
title_short Radio Luminosity Function of Flat-spectrum Radio Quasars
title_full Radio Luminosity Function of Flat-spectrum Radio Quasars
title_fullStr Radio Luminosity Function of Flat-spectrum Radio Quasars
title_full_unstemmed Radio Luminosity Function of Flat-spectrum Radio Quasars
title_sort radio luminosity function of flat-spectrum radio quasars
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87611
work_keys_str_mv AT maopeiyuan radioluminosityfunctionofflatspectrumradioquasars
AT urrycmegan radioluminosityfunctionofflatspectrumradioquasars
AT marchesiniezequieljoaquin radioluminosityfunctionofflatspectrumradioquasars
AT landonimarco radioluminosityfunctionofflatspectrumradioquasars
AT massarofrancesco radioluminosityfunctionofflatspectrumradioquasars
AT ajellomarco radioluminosityfunctionofflatspectrumradioquasars
bdutipo_str Repositorios
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