Radio Luminosity Function of Flat-spectrum Radio Quasars
- Autores
- Mao, Peiyuan; Urry, C. Megan; Marchesini, Ezequiel Joaquín; Landoni, Marco; Massaro, Francesco; Ajello, Marco
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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 L1.4 ∼ 43.8 erg s-1, respectively.
Fil: Mao, Peiyuan. Yale Center For Astronomy And Astrophysics; Estados Unidos
Fil: Urry, C. Megan. Yale Center For Astronomy And Astrophysics; Estados Unidos
Fil: Marchesini, Ezequiel Joaquín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; Italia. Inaf Istituto Di Astrofisica Spaziale E Fisica Cosmica; Italia. Università di Torino; Italia
Fil: Landoni, Marco. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; . Università di Torino; Italia
Fil: Massaro, Francesco. Università di Torino; Italia. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; Italia
Fil: Ajello, Marco. Clemson University; Estados Unidos - Materia
-
COSMOLOGY: OBSERVATIONS
GALAXIES: ACTIVE
GALAXIES: JETS
QUASARS: GENERAL - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/69481
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Radio Luminosity Function of Flat-spectrum Radio QuasarsMao, PeiyuanUrry, C. MeganMarchesini, Ezequiel JoaquínLandoni, MarcoMassaro, FrancescoAjello, MarcoCOSMOLOGY: OBSERVATIONSGALAXIES: ACTIVEGALAXIES: JETSQUASARS: GENERALhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We 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 L1.4 ∼ 43.8 erg s-1, respectively.Fil: Mao, Peiyuan. Yale Center For Astronomy And Astrophysics; Estados UnidosFil: Urry, C. Megan. Yale Center For Astronomy And Astrophysics; Estados UnidosFil: Marchesini, Ezequiel Joaquín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; Italia. Inaf Istituto Di Astrofisica Spaziale E Fisica Cosmica; Italia. Università di Torino; ItaliaFil: Landoni, Marco. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; . Università di Torino; ItaliaFil: Massaro, Francesco. Università di Torino; Italia. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; ItaliaFil: Ajello, Marco. Clemson University; Estados UnidosIOP Publishing2017-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/69481Mao, Peiyuan; Urry, C. Megan; Marchesini, Ezequiel Joaquín; Landoni, Marco; Massaro, Francesco; et al.; Radio Luminosity Function of Flat-spectrum Radio Quasars; IOP Publishing; Astrophysical Journal; 842; 2; 6-2017; 1-140004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aa74b8info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/aa74b8info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:52:41Zoai:ri.conicet.gov.ar:11336/69481instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:52:41.822CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Radio Luminosity Function of Flat-spectrum Radio Quasars |
title |
Radio Luminosity Function of Flat-spectrum Radio Quasars |
spellingShingle |
Radio Luminosity Function of Flat-spectrum Radio Quasars Mao, Peiyuan COSMOLOGY: OBSERVATIONS GALAXIES: ACTIVE GALAXIES: JETS QUASARS: GENERAL |
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 |
dc.creator.none.fl_str_mv |
Mao, Peiyuan Urry, C. Megan Marchesini, Ezequiel Joaquín Landoni, Marco Massaro, Francesco Ajello, Marco |
author |
Mao, Peiyuan |
author_facet |
Mao, Peiyuan Urry, C. Megan Marchesini, Ezequiel Joaquín Landoni, Marco Massaro, Francesco Ajello, Marco |
author_role |
author |
author2 |
Urry, C. Megan Marchesini, Ezequiel Joaquín Landoni, Marco Massaro, Francesco Ajello, Marco |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
COSMOLOGY: OBSERVATIONS GALAXIES: ACTIVE GALAXIES: JETS QUASARS: GENERAL |
topic |
COSMOLOGY: OBSERVATIONS GALAXIES: ACTIVE GALAXIES: JETS QUASARS: GENERAL |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
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 L1.4 ∼ 43.8 erg s-1, respectively. Fil: Mao, Peiyuan. Yale Center For Astronomy And Astrophysics; Estados Unidos Fil: Urry, C. Megan. Yale Center For Astronomy And Astrophysics; Estados Unidos Fil: Marchesini, Ezequiel Joaquín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; Italia. Inaf Istituto Di Astrofisica Spaziale E Fisica Cosmica; Italia. Università di Torino; Italia Fil: Landoni, Marco. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; . Università di Torino; Italia Fil: Massaro, Francesco. Università di Torino; Italia. Istituto Nazionale Di Fisica Nucleare, Sezione Di Torino; Italia Fil: Ajello, Marco. Clemson University; Estados Unidos |
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 L1.4 ∼ 43.8 erg s-1, respectively. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-06 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/69481 Mao, Peiyuan; Urry, C. Megan; Marchesini, Ezequiel Joaquín; Landoni, Marco; Massaro, Francesco; et al.; Radio Luminosity Function of Flat-spectrum Radio Quasars; IOP Publishing; Astrophysical Journal; 842; 2; 6-2017; 1-14 0004-637X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/69481 |
identifier_str_mv |
Mao, Peiyuan; Urry, C. Megan; Marchesini, Ezequiel Joaquín; Landoni, Marco; Massaro, Francesco; et al.; Radio Luminosity Function of Flat-spectrum Radio Quasars; IOP Publishing; Astrophysical Journal; 842; 2; 6-2017; 1-14 0004-637X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aa74b8 info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/aa74b8 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
IOP Publishing |
publisher.none.fl_str_mv |
IOP Publishing |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613615400779776 |
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13.070432 |