Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars

Blazar variability appears to be stochastic in nature. However, a possibility of low-dimensional chaos was considered in the past, but with no unambiguous detection so far. If present, it would constrain the emission mechanism by suggesting an underlying dynamical system. We rigorously searched for...

Descripción completa

Detalles Bibliográficos
Autores: Ostapenko, O., Tarnopolski, M., Żywucka, N., Pascual Granado, J.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/247889
Acceso en línea:http://hdl.handle.net/10261/247889
Access Level:acceso abierto
Palabra clave:Chaos
Methods: data analysis
Galaxies: active
BL Lacertae objects: general
Galaxies: jets
Gamma rays: galaxies
id ES_6c471f3ce8470da9e0002a4e4a2cd020
oai_identifier_str oai:digital.csic.es:10261/247889
network_acronym_str ES
network_name_str España
repository_id_str
spelling Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazarsOstapenko, O.Tarnopolski, M.Żywucka, N.Pascual Granado, J.ChaosMethods: data analysisGalaxies: activeBL Lacertae objects: generalGalaxies: jetsGamma rays: galaxiesBlazar variability appears to be stochastic in nature. However, a possibility of low-dimensional chaos was considered in the past, but with no unambiguous detection so far. If present, it would constrain the emission mechanism by suggesting an underlying dynamical system. We rigorously searched for signatures of chaos in Fermi-Large Area Telescope light curves of 11 blazars. The data were comprehensively investigated using the methods of nonlinear time-series analysis: phase-space reconstruction, fractal dimension, and maximal Lyapunov exponent (mLE). We tested several possible parameters affecting the outcomes, in particular the mLE, in order to verify the spuriousness of the outcomes. We found no signs of chaos in any of the analysed blazars. Blazar variability is either truly stochastic in nature or governed by high-dimensional chaos that can often resemble randomness. © 2021 The Author(s).OO thanks the Astronomical Observatory of the Jagiellonian University for the summer internship during which this research began. MT acknowledges support by the Polish National Science Center through the OPUS grant No. 2017/25/B/ST9/01208. The work of N. Z is supported by the South African Research Chairs Initiative (grant no. 64789) of the Department of Science and Innovation and the National Research Foundation of South Africa. J.P.-G. acknowledges funding support from Spanish public funds for research under project ESP2017-87676-C5-5-R and financial support from the State Agency for Research of the Spanish MCIU through the `Center of Excellence Severo Ochoa' award to the Instituto de Astrof ' isica de Andaluc ' ia (SEV-2017-0709).Peer reviewedOxford University PressEuropean CommissionMinisterio de Economía y Competitividad (España)National Research Foundation (South Africa)Ministerio de Ciencia, Innovación y Universidades (España)National Centre for Research and Development (Poland)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/247889reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/ESP2017-87676-C5-5-Rinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2017-0709http://dx.doi.org/10.1093/mnras/stab146Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2478892026-05-22T06:33:51Z
dc.title.none.fl_str_mv Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
title Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
spellingShingle Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
Ostapenko, O.
Chaos
Methods: data analysis
Galaxies: active
BL Lacertae objects: general
Galaxies: jets
Gamma rays: galaxies
title_short Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
title_full Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
title_fullStr Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
title_full_unstemmed Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
title_sort Searching for signatures of chaos in gamma-ray light curves of selected Fermi-LAT blazars
dc.creator.none.fl_str_mv Ostapenko, O.
Tarnopolski, M.
Żywucka, N.
Pascual Granado, J.
author Ostapenko, O.
author_facet Ostapenko, O.
Tarnopolski, M.
Żywucka, N.
Pascual Granado, J.
author_role author
author2 Tarnopolski, M.
Żywucka, N.
Pascual Granado, J.
author2_role author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Economía y Competitividad (España)
National Research Foundation (South Africa)
Ministerio de Ciencia, Innovación y Universidades (España)
National Centre for Research and Development (Poland)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Chaos
Methods: data analysis
Galaxies: active
BL Lacertae objects: general
Galaxies: jets
Gamma rays: galaxies
topic Chaos
Methods: data analysis
Galaxies: active
BL Lacertae objects: general
Galaxies: jets
Gamma rays: galaxies
description Blazar variability appears to be stochastic in nature. However, a possibility of low-dimensional chaos was considered in the past, but with no unambiguous detection so far. If present, it would constrain the emission mechanism by suggesting an underlying dynamical system. We rigorously searched for signatures of chaos in Fermi-Large Area Telescope light curves of 11 blazars. The data were comprehensively investigated using the methods of nonlinear time-series analysis: phase-space reconstruction, fractal dimension, and maximal Lyapunov exponent (mLE). We tested several possible parameters affecting the outcomes, in particular the mLE, in order to verify the spuriousness of the outcomes. We found no signs of chaos in any of the analysed blazars. Blazar variability is either truly stochastic in nature or governed by high-dimensional chaos that can often resemble randomness. © 2021 The Author(s).
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
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/10261/247889
url http://hdl.handle.net/10261/247889
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/ESP2017-87676-C5-5-R
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2017-0709
http://dx.doi.org/10.1093/mnras/stab146
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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
_version_ 1869410256648404992
score 15,81155

Similares en LA Referencia