SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006

The supernova remnant SN 1006 is a powerful source of high-energy particles and evolves in a relatively tenuous and uniform environment despite interacting with an atomic cloud in its northwestern limb. The X-ray image of SN 1006 reveals an indentation in the southwestern part of the shock front and...

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Autores principales: Miceli, M., Acero, F., Dubner, G., Decourchelle, A., Orlando, S., Bocchino, F.
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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_20418205_v782_n2_p_Miceli
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spelling todo:paper_20418205_v782_n2_p_Miceli2023-10-03T16:38:04Z SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006 Miceli, M. Acero, F. Dubner, G. Decourchelle, A. Orlando, S. Bocchino, F. acceleration of particles ISM: clouds ISM: individual objects (SN 1006) ISM: supernova remnants X-rays: ISM The supernova remnant SN 1006 is a powerful source of high-energy particles and evolves in a relatively tenuous and uniform environment despite interacting with an atomic cloud in its northwestern limb. The X-ray image of SN 1006 reveals an indentation in the southwestern part of the shock front and the H I maps show an isolated (southwestern) cloud, having the same velocity as the northwestern cloud, whose morphology fits perfectly in the indentation. We performed spatially resolved spectral analysis of a set of small regions in the southwestern nonthermal limb and studied the deep X-ray spectra obtained within the XMM-Newton SN 1006 Large Program. We also analyzed archive H I data, obtained by combining single-dish and interferometric observations. We found that the best-fit value of N H derived from the X-ray spectra significantly increases in regions corresponding to the southwestern cloud, while the cutoff energy of the synchrotron emission decreases. The N H variation corresponds perfectly with the H I column density of the southwestern cloud, as measured from the radio data. The decrease in the cutoff energy at the indentation clearly reveals that the back side of the cloud is actually interacting with the remnant. The southwestern limb therefore presents a unique combination of efficient particle acceleration and high ambient density, thus being the most promising region for γ-ray hadronic emission in SN 1006. We estimate that such emission will be detectable with the Fermi telescope within a few years. © 2014. The American Astronomical Society. All rights reserved.. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20418205_v782_n2_p_Miceli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic acceleration of particles
ISM: clouds
ISM: individual objects (SN 1006)
ISM: supernova remnants
X-rays: ISM
spellingShingle acceleration of particles
ISM: clouds
ISM: individual objects (SN 1006)
ISM: supernova remnants
X-rays: ISM
Miceli, M.
Acero, F.
Dubner, G.
Decourchelle, A.
Orlando, S.
Bocchino, F.
SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006
topic_facet acceleration of particles
ISM: clouds
ISM: individual objects (SN 1006)
ISM: supernova remnants
X-rays: ISM
description The supernova remnant SN 1006 is a powerful source of high-energy particles and evolves in a relatively tenuous and uniform environment despite interacting with an atomic cloud in its northwestern limb. The X-ray image of SN 1006 reveals an indentation in the southwestern part of the shock front and the H I maps show an isolated (southwestern) cloud, having the same velocity as the northwestern cloud, whose morphology fits perfectly in the indentation. We performed spatially resolved spectral analysis of a set of small regions in the southwestern nonthermal limb and studied the deep X-ray spectra obtained within the XMM-Newton SN 1006 Large Program. We also analyzed archive H I data, obtained by combining single-dish and interferometric observations. We found that the best-fit value of N H derived from the X-ray spectra significantly increases in regions corresponding to the southwestern cloud, while the cutoff energy of the synchrotron emission decreases. The N H variation corresponds perfectly with the H I column density of the southwestern cloud, as measured from the radio data. The decrease in the cutoff energy at the indentation clearly reveals that the back side of the cloud is actually interacting with the remnant. The southwestern limb therefore presents a unique combination of efficient particle acceleration and high ambient density, thus being the most promising region for γ-ray hadronic emission in SN 1006. We estimate that such emission will be detectable with the Fermi telescope within a few years. © 2014. The American Astronomical Society. All rights reserved..
format JOUR
author Miceli, M.
Acero, F.
Dubner, G.
Decourchelle, A.
Orlando, S.
Bocchino, F.
author_facet Miceli, M.
Acero, F.
Dubner, G.
Decourchelle, A.
Orlando, S.
Bocchino, F.
author_sort Miceli, M.
title SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006
title_short SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006
title_full SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006
title_fullStr SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006
title_full_unstemmed SHOCK-cloud interaction and particle acceleration in the southwestern limb of sn 1006
title_sort shock-cloud interaction and particle acceleration in the southwestern limb of sn 1006
url http://hdl.handle.net/20.500.12110/paper_20418205_v782_n2_p_Miceli
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AT acerof shockcloudinteractionandparticleaccelerationinthesouthwesternlimbofsn1006
AT dubnerg shockcloudinteractionandparticleaccelerationinthesouthwesternlimbofsn1006
AT decourchellea shockcloudinteractionandparticleaccelerationinthesouthwesternlimbofsn1006
AT orlandos shockcloudinteractionandparticleaccelerationinthesouthwesternlimbofsn1006
AT bocchinof shockcloudinteractionandparticleaccelerationinthesouthwesternlimbofsn1006
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