Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006

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Using radio, X-ray, and optical observations, we present evidence for morphological changes due to efficient cosmic ray ion acceleration in the structure of the southeastern region of the supernova remnant SN 1006. SN 1006 has an apparent bipolar morphology in both the radio and high-energy X-ray sy...

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Autores principales: Cassam-Chenai, G., Hughes, J.P., Reynoso, E.M., Badenes, C., Moffett, D.
Formato: Artículo publishedVersion
Publicado: 2008
Materias:
Acceleration of particles
Cosmic rays
ISM: individual (SN 1006)
Shock waves
Supernova remnants
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0004637X_v680_n2_p1180_CassamChenai
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0004637X_v680_n2_p1180_CassamChenai_oai
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Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires
id I28-R145-paper_0004637X_v680_n2_p1180_CassamChenai_oai
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spelling I28-R145-paper_0004637X_v680_n2_p1180_CassamChenai_oai2024-08-16 Cassam-Chenai, G. Hughes, J.P. Reynoso, E.M. Badenes, C. Moffett, D. 2008 Using radio, X-ray, and optical observations, we present evidence for morphological changes due to efficient cosmic ray ion acceleration in the structure of the southeastern region of the supernova remnant SN 1006. SN 1006 has an apparent bipolar morphology in both the radio and high-energy X-ray synchrotron emission. In the optical, the shock front is clearly traced by a filament of Balmer emission in the southeast. This optical emission enables us to trace the location of the blast wave (BW) even in places where the synchrotron emission from relativistic electrons is either absent or too weak to detect. The contact discontinuity (CD) is traced using images in the low-energy X-rays (oxygen band), which we argue reveals the distribution of shocked ejecta. We interpret the azimuthal variations of the ratio of radii between the BW and CD plus the X-ray and radio synchrotron emission at the BW using CR-modified hydrodynamic models. We assumed different azimuthal profiles for the injection rate of particles into the acceleration process, magnetic field, and level of turbulence. We found that the observations are consistent with a model in which these parameters are all azimuthally varying, being largest in the brightest regions. © 2008. The American Astronomical Society. All rights reserved. Fil:Reynoso, E.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_0004637X_v680_n2_p1180_CassamChenai info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Astrophys. J. 2008;680(2):1180-1197 Acceleration of particles Cosmic rays ISM: individual (SN 1006) Shock waves Supernova remnants Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0004637X_v680_n2_p1180_CassamChenai_oai
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-145
collection Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic Acceleration of particles
Cosmic rays
ISM: individual (SN 1006)
Shock waves
Supernova remnants
spellingShingle Acceleration of particles
Cosmic rays
ISM: individual (SN 1006)
Shock waves
Supernova remnants
Cassam-Chenai, G.
Hughes, J.P.
Reynoso, E.M.
Badenes, C.
Moffett, D.
Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006
topic_facet Acceleration of particles
Cosmic rays
ISM: individual (SN 1006)
Shock waves
Supernova remnants
description Using radio, X-ray, and optical observations, we present evidence for morphological changes due to efficient cosmic ray ion acceleration in the structure of the southeastern region of the supernova remnant SN 1006. SN 1006 has an apparent bipolar morphology in both the radio and high-energy X-ray synchrotron emission. In the optical, the shock front is clearly traced by a filament of Balmer emission in the southeast. This optical emission enables us to trace the location of the blast wave (BW) even in places where the synchrotron emission from relativistic electrons is either absent or too weak to detect. The contact discontinuity (CD) is traced using images in the low-energy X-rays (oxygen band), which we argue reveals the distribution of shocked ejecta. We interpret the azimuthal variations of the ratio of radii between the BW and CD plus the X-ray and radio synchrotron emission at the BW using CR-modified hydrodynamic models. We assumed different azimuthal profiles for the injection rate of particles into the acceleration process, magnetic field, and level of turbulence. We found that the observations are consistent with a model in which these parameters are all azimuthally varying, being largest in the brightest regions. © 2008. The American Astronomical Society. All rights reserved.
format Artículo
Artículo
publishedVersion
author Cassam-Chenai, G.
Hughes, J.P.
Reynoso, E.M.
Badenes, C.
Moffett, D.
author_facet Cassam-Chenai, G.
Hughes, J.P.
Reynoso, E.M.
Badenes, C.
Moffett, D.
author_sort Cassam-Chenai, G.
title Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006
title_short Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006
title_full Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006
title_fullStr Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006
title_full_unstemmed Morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of SN 1006
title_sort morphological evidence for azimuthal variations of the cosmic-ray ion acceleration at the blast wave of sn 1006
publishDate 2008
url http://hdl.handle.net/20.500.12110/paper_0004637X_v680_n2_p1180_CassamChenai
https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_0004637X_v680_n2_p1180_CassamChenai_oai
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AT reynosoem morphologicalevidenceforazimuthalvariationsofthecosmicrayionaccelerationattheblastwaveofsn1006
AT badenesc morphologicalevidenceforazimuthalvariationsofthecosmicrayionaccelerationattheblastwaveofsn1006
AT moffettd morphologicalevidenceforazimuthalvariationsofthecosmicrayionaccelerationattheblastwaveofsn1006
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