Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars

Planck Collaboration et al.

Detalhes bibliográficos
Autores: Giommi, Paolo, González-Nuevo, J., López-Caniego, M., Planck Collaboration
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2012
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/109108
Acesso em linha:http://hdl.handle.net/10261/109108
Access Level:Acceso aberto
Palavra-chave:Galaxies: active
BL Lacertae objects: general
Quasars: general
Relativistic processes
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oai_identifier_str oai:digital.csic.es:10261/109108
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
title Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
spellingShingle Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
Giommi, Paolo
Galaxies: active
BL Lacertae objects: general
Quasars: general
Relativistic processes
title_short Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
title_full Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
title_fullStr Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
title_full_unstemmed Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
title_sort Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
dc.creator.none.fl_str_mv Giommi, Paolo
González-Nuevo, J.
López-Caniego, M.
Planck Collaboration
author Giommi, Paolo
author_facet Giommi, Paolo
González-Nuevo, J.
López-Caniego, M.
Planck Collaboration
author_role author
author2 González-Nuevo, J.
López-Caniego, M.
Planck Collaboration
author2_role author
author
author
dc.contributor.none.fl_str_mv European Space Agency
Centre National D'Etudes Spatiales (France)
Centre National de la Recherche Scientifique (France)
Consiglio Nazionale delle Ricerche
Istituto Nazionale di Astrofisica
Agenzia Spaziale Italiana
NASA
Department of Energy (US)
Science and Technology Facilities Council (UK)
UK Space Agency
Ministerio de Ciencia e Innovación (España)
Junta de Andalucía
Consejo Superior de Investigaciones Científicas (España)
Academy of Finland
Center for Science (Finland)
German Centre for Air and Space Travel
Max Planck Society
DTU Space (Denmark)
Swiss Space Office
Research Council of Norway
Science Foundation Ireland
Fundação para a Ciência e a Tecnologia (Portugal)
dc.subject.none.fl_str_mv Galaxies: active
BL Lacertae objects: general
Quasars: general
Relativistic processes
topic Galaxies: active
BL Lacertae objects: general
Quasars: general
Relativistic processes
description Planck Collaboration et al.
publishDate 2012
dc.date.none.fl_str_mv 2012
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/109108
url http://hdl.handle.net/10261/109108
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1051/0004-6361/201117825
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazarsGiommi, PaoloGonzález-Nuevo, J.López-Caniego, M.Planck CollaborationGalaxies: activeBL Lacertae objects: generalQuasars: generalRelativistic processesPlanck Collaboration et al.We present simultaneous Planck, Swift, Fermi, and ground-based data for 105 blazars belonging to three samples with flux limits in the soft X-ray, hard X-ray, and γ-ray bands, with additional 5GHz flux-density limits to ensure a good probability of a Planck detection. We compare our results to those of a companion paper presenting simultaneous Planck and multi-frequency observations of 104 radio-loud northern active galactic nuclei selected at radio frequencies. While we confirm several previous results, our unique data set allows us to demonstrate that the selection method strongly influences the results, producing biases that cannot be ignored. Almost all the BL Lac objects have been detected by the Fermi Large AreaTelescope (LAT), whereas 30% to 40% of the flat-spectrum radio quasars (FSRQs) in the radio, soft X-ray, and hard X-ray selected samples are still below the γ-ray detection limit even after integrating 27 months of Fermi-LAT data. The radio to sub-millimetre spectral slope of blazars is quite flat, with α ~ 0 up to about 70GHz, above which it steepens to α ~-0.65. The BL Lacs have significantly flatter spectra than FSRQs at higher frequencies. The distribution of the rest-frame synchrotron peak frequency (ν peak S) in the spectral energy distribution (SED) of FSRQs is the same in all the blazar samples with ν peak S = 10 13.1 ± 0.1 Hz, while the mean inverse Compton peak frequency, ν peak IC, ranges from 10 21 to 10 22 Hz. The distributions of ν peak S and ν peak IC of BL Lacs are much broader and are shifted to higher energies than those of FSRQs; their shapes strongly depend on the selection method. The Compton dominance of blazars, defined as the ratio of the inverse Compton to synchrotron peak luminosities, ranges from less than 0.2 to nearly 100, with only FSRQs reaching values larger than about 3. Its distribution is broad and depends strongly on the selection method, with γ-ray selected blazars peaking at ~7 or more, and radio-selected blazars at values close to 1, thus implying that the common assumption that the blazar power budget is largely dominated by high-energy emission is a selection effect. A comparison of our multi-frequency data with theoretical predictions shows that simple homogeneous SSC models cannot explain the simultaneous SEDs of most of the γ-ray detected blazars in all samples. The SED of the blazars that were not detected by Fermi-LAT may instead be consistent with SSC emission. Our data challenge the correlation between bolometric luminosity and ν peak S predicted by the blazar sequence. © 2012 ESO.The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MICINN and JA (Spain); Tekes, AoF and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and DEISA (EU).Peer ReviewedEDP SciencesEuropean Space AgencyCentre National D'Etudes Spatiales (France)Centre National de la Recherche Scientifique (France)Consiglio Nazionale delle RicercheIstituto Nazionale di AstrofisicaAgenzia Spaziale ItalianaNASADepartment of Energy (US)Science and Technology Facilities Council (UK)UK Space AgencyMinisterio de Ciencia e Innovación (España)Junta de AndalucíaConsejo Superior de Investigaciones Científicas (España)Academy of FinlandCenter for Science (Finland)German Centre for Air and Space TravelMax Planck SocietyDTU Space (Denmark)Swiss Space OfficeResearch Council of NorwayScience Foundation IrelandFundação para a Ciência e a Tecnologia (Portugal)2015201520122015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/109108reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1051/0004-6361/201117825info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1091082026-05-22T06:33:51Z
score 15.811543

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