Cosmological evolution of quasar radio emission in the view of multifractality
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/jspui/handle/123456789/29059 http://dx.doi.org/10.3847/1538-4357/ab074e |
Resumo: | Variations in scaling behavior in the flux and emissions of distant astronomical sources with respect to their cosmic time are important phenomena that can provide valuable information about the dynamics within the sources and their cosmological evolution with time. Different studies have been applying linear analysis to understand and model quasars’ light curves. Here, we study the multifractal behavior of selected quasars’ radio emissions in their observed frame (at 22 and 37 GHz bands) and their rest frame. To this end, we apply the wavelet transform-based multifractal analysis formalism called wavelet transform modulus maxima. In addition, we verify whether the autoregressive integrated moving average (ARIMA) models fit our data. In our work, we observe strong multifractal behavior for all the sources. Additionally, we find that the degree of multifractality is strongly similar for each source and significantly different between sources at 22 and 37 GHz. This similarity implies that the two frequencies have the same radiation region and mechanism, whereas the difference indicates that the sources have intrinsically different dynamics. Furthermore, we show that the degree of multifractality is the same in the observed and rest frames of the quasars, i.e., multifractality is an intrinsic property of radio quasars. Finally, we show that the ARIMA models fit the 3C 345 quasar at 22 GHz and partially fit most of the time series, with the exception of the 3C 273 and 3C 279 quasars at 37 GHz, for which the models are found to be inadequate |
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Martins, Bruno Leonardo CantoBelete, A. BewketuFemmam, SmainTornikosk, MerjaLähteenmäki, AnneTammi, JoniLeão, Izan de CastroMedeiros, J. R. de2020-05-26T00:44:08Z2020-05-26T00:44:08Z2019-03-11MARTINS, Bruno Leonardo Canto et al. Cosmological Evolution of Quasar Radio Emission in the View of Multifractality. The Astrophysical Journal, [s. l.], v. 873, n. 2, p. 108-126, 11 mar. 2019. ISSN 1538-4357 versão online. DOI http://dx.doi.org/10.3847/1538-4357/ab074e. Disponível em: https://iopscience.iop.org/article/10.3847/1538-4357/ab074e. Acesso em: 25 maio 2020.0004-637X (print), 1538-4357 (online)https://repositorio.ufrn.br/jspui/handle/123456789/29059http://dx.doi.org/10.3847/1538-4357/ab074eAmerican Astronomical SocietyAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessGalaxies: activeMethods: statisticalQuasars: individual (3C 273, 3C 279, 3C 345, 3C 454.3)Cosmological evolution of quasar radio emission in the view of multifractalityinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleVariations in scaling behavior in the flux and emissions of distant astronomical sources with respect to their cosmic time are important phenomena that can provide valuable information about the dynamics within the sources and their cosmological evolution with time. Different studies have been applying linear analysis to understand and model quasars’ light curves. Here, we study the multifractal behavior of selected quasars’ radio emissions in their observed frame (at 22 and 37 GHz bands) and their rest frame. To this end, we apply the wavelet transform-based multifractal analysis formalism called wavelet transform modulus maxima. In addition, we verify whether the autoregressive integrated moving average (ARIMA) models fit our data. In our work, we observe strong multifractal behavior for all the sources. Additionally, we find that the degree of multifractality is strongly similar for each source and significantly different between sources at 22 and 37 GHz. This similarity implies that the two frequencies have the same radiation region and mechanism, whereas the difference indicates that the sources have intrinsically different dynamics. Furthermore, we show that the degree of multifractality is the same in the observed and rest frames of the quasars, i.e., multifractality is an intrinsic property of radio quasars. Finally, we show that the ARIMA models fit the 3C 345 quasar at 22 GHz and partially fit most of the time series, with the exception of the 3C 273 and 3C 279 quasars at 37 GHz, for which the models are found to be inadequateengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALCosmological Evolution of Quasar Radio Emission in the View of Multifractality_2019.pdfCosmological Evolution of Quasar Radio Emission in the View of Multifractality_2019.pdfapplication/pdf4439618https://repositorio.ufrn.br/bitstream/123456789/29059/1/Cosmological%20Evolution%20of%20Quasar%20Radio%20Emission%20in%20the%20View%20of%20Multifractality_2019.pdf85edd8a5a21cf453d6dec9759ff18a9fMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/29059/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/29059/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTCosmological Evolution of Quasar Radio Emission in the View of Multifractality_2019.pdf.txtCosmological Evolution of Quasar Radio Emission in the View of Multifractality_2019.pdf.txtExtracted texttext/plain68368https://repositorio.ufrn.br/bitstream/123456789/29059/4/Cosmological%20Evolution%20of%20Quasar%20Radio%20Emission%20in%20the%20View%20of%20Multifractality_2019.pdf.txtf11cf70409aa77cc8c8c0692446eae51MD54THUMBNAILCosmological Evolution of Quasar Radio Emission in the View of Multifractality_2019.pdf.jpgCosmological Evolution of Quasar Radio Emission in the View of Multifractality_2019.pdf.jpgGenerated Thumbnailimage/jpeg1877https://repositorio.ufrn.br/bitstream/123456789/29059/5/Cosmological%20Evolution%20of%20Quasar%20Radio%20Emission%20in%20the%20View%20of%20Multifractality_2019.pdf.jpgc5143589d49c7344073bd5222c5d5fe0MD55123456789/290592020-06-03 12:51:43.928oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-06-03T15:51:43Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Cosmological evolution of quasar radio emission in the view of multifractality |
title |
Cosmological evolution of quasar radio emission in the view of multifractality |
spellingShingle |
Cosmological evolution of quasar radio emission in the view of multifractality Martins, Bruno Leonardo Canto Galaxies: active Methods: statistical Quasars: individual (3C 273, 3C 279, 3C 345, 3C 454.3) |
title_short |
Cosmological evolution of quasar radio emission in the view of multifractality |
title_full |
Cosmological evolution of quasar radio emission in the view of multifractality |
title_fullStr |
Cosmological evolution of quasar radio emission in the view of multifractality |
title_full_unstemmed |
Cosmological evolution of quasar radio emission in the view of multifractality |
title_sort |
Cosmological evolution of quasar radio emission in the view of multifractality |
author |
Martins, Bruno Leonardo Canto |
author_facet |
Martins, Bruno Leonardo Canto Belete, A. Bewketu Femmam, Smain Tornikosk, Merja Lähteenmäki, Anne Tammi, Joni Leão, Izan de Castro Medeiros, J. R. de |
author_role |
author |
author2 |
Belete, A. Bewketu Femmam, Smain Tornikosk, Merja Lähteenmäki, Anne Tammi, Joni Leão, Izan de Castro Medeiros, J. R. de |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Martins, Bruno Leonardo Canto Belete, A. Bewketu Femmam, Smain Tornikosk, Merja Lähteenmäki, Anne Tammi, Joni Leão, Izan de Castro Medeiros, J. R. de |
dc.subject.por.fl_str_mv |
Galaxies: active Methods: statistical Quasars: individual (3C 273, 3C 279, 3C 345, 3C 454.3) |
topic |
Galaxies: active Methods: statistical Quasars: individual (3C 273, 3C 279, 3C 345, 3C 454.3) |
description |
Variations in scaling behavior in the flux and emissions of distant astronomical sources with respect to their cosmic time are important phenomena that can provide valuable information about the dynamics within the sources and their cosmological evolution with time. Different studies have been applying linear analysis to understand and model quasars’ light curves. Here, we study the multifractal behavior of selected quasars’ radio emissions in their observed frame (at 22 and 37 GHz bands) and their rest frame. To this end, we apply the wavelet transform-based multifractal analysis formalism called wavelet transform modulus maxima. In addition, we verify whether the autoregressive integrated moving average (ARIMA) models fit our data. In our work, we observe strong multifractal behavior for all the sources. Additionally, we find that the degree of multifractality is strongly similar for each source and significantly different between sources at 22 and 37 GHz. This similarity implies that the two frequencies have the same radiation region and mechanism, whereas the difference indicates that the sources have intrinsically different dynamics. Furthermore, we show that the degree of multifractality is the same in the observed and rest frames of the quasars, i.e., multifractality is an intrinsic property of radio quasars. Finally, we show that the ARIMA models fit the 3C 345 quasar at 22 GHz and partially fit most of the time series, with the exception of the 3C 273 and 3C 279 quasars at 37 GHz, for which the models are found to be inadequate |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-03-11 |
dc.date.accessioned.fl_str_mv |
2020-05-26T00:44:08Z |
dc.date.available.fl_str_mv |
2020-05-26T00:44:08Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MARTINS, Bruno Leonardo Canto et al. Cosmological Evolution of Quasar Radio Emission in the View of Multifractality. The Astrophysical Journal, [s. l.], v. 873, n. 2, p. 108-126, 11 mar. 2019. ISSN 1538-4357 versão online. DOI http://dx.doi.org/10.3847/1538-4357/ab074e. Disponível em: https://iopscience.iop.org/article/10.3847/1538-4357/ab074e. Acesso em: 25 maio 2020. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/jspui/handle/123456789/29059 |
dc.identifier.issn.none.fl_str_mv |
0004-637X (print), 1538-4357 (online) |
dc.identifier.doi.none.fl_str_mv |
http://dx.doi.org/10.3847/1538-4357/ab074e |
identifier_str_mv |
MARTINS, Bruno Leonardo Canto et al. Cosmological Evolution of Quasar Radio Emission in the View of Multifractality. The Astrophysical Journal, [s. l.], v. 873, n. 2, p. 108-126, 11 mar. 2019. ISSN 1538-4357 versão online. DOI http://dx.doi.org/10.3847/1538-4357/ab074e. Disponível em: https://iopscience.iop.org/article/10.3847/1538-4357/ab074e. Acesso em: 25 maio 2020. 0004-637X (print), 1538-4357 (online) |
url |
https://repositorio.ufrn.br/jspui/handle/123456789/29059 http://dx.doi.org/10.3847/1538-4357/ab074e |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
American Astronomical Society |
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American Astronomical Society |
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