New perspectives on the supernova remnant Puppis A based on a radio polarization study

We present a polarization study towards the supernova remnant (SNR) Puppis A based on original observations performed with the Australia Telescope Compact Array. Based on the analysis of a feature detected outside the SNR shell (called 'the tail' throughout the paper), it was possible to d...

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Autores principales:	Reynoso, E.M., Velázquez, P.F., Cichowolski, S.
Formato:	JOUR
Materias:	ISM: Individual objects: Puppis A ISM: Supernova remnants Magnetic fields Polarization
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00358711_v477_n2_p2087_Reynoso
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00358711_v477_n2_p2087_Reynoso
record_format	dspace
spelling	todo:paper_00358711_v477_n2_p2087_Reynoso2023-10-03T14:47:23Z New perspectives on the supernova remnant Puppis A based on a radio polarization study Reynoso, E.M. Velázquez, P.F. Cichowolski, S. ISM: Individual objects: Puppis A ISM: Supernova remnants Magnetic fields Polarization We present a polarization study towards the supernova remnant (SNR) Puppis A based on original observations performed with the Australia Telescope Compact Array. Based on the analysis of a feature detected outside the SNR shell (called 'the tail' throughout the paper), it was possible to disentangle the emission with origin in Puppis A itself from that coming from the foreground Vela SNR. We found a very low polarization fraction, of about 3 per cent on average. The upper limit of the magnetic field component parallel to the line of sight is estimated to be B ~ 20 μG. The statistical behaviour of the magnetic vectors shows two preferential directions, almost perpendicular to each other, which are approximately aligned with the flat edges of Puppis A. A third, narrow peak oriented perpendicular to the Galactic plane suggests the existence of an interstellar magnetic field locally aligned in this direction. There is evidence that the magnetic vectors along the shell are aligned with the shock front direction. The low polarization fraction and the statistical behaviour of the magnetic vectors are compatible with a scenario where the SNR evolves inside a stellar wind bubble with a box-like morphology, produced by the interaction of the different stellar winds, one of them magnetized, launched by the SN progenitor. This scenario can furthermore explain the morphology of Puppis A, rendering little support to the previously accepted picture which involved strong density gradients to explain the flat, eastern edge of the shell. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v477_n2_p2087_Reynoso
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	ISM: Individual objects: Puppis A ISM: Supernova remnants Magnetic fields Polarization
spellingShingle	ISM: Individual objects: Puppis A ISM: Supernova remnants Magnetic fields Polarization Reynoso, E.M. Velázquez, P.F. Cichowolski, S. New perspectives on the supernova remnant Puppis A based on a radio polarization study
topic_facet	ISM: Individual objects: Puppis A ISM: Supernova remnants Magnetic fields Polarization
description	We present a polarization study towards the supernova remnant (SNR) Puppis A based on original observations performed with the Australia Telescope Compact Array. Based on the analysis of a feature detected outside the SNR shell (called 'the tail' throughout the paper), it was possible to disentangle the emission with origin in Puppis A itself from that coming from the foreground Vela SNR. We found a very low polarization fraction, of about 3 per cent on average. The upper limit of the magnetic field component parallel to the line of sight is estimated to be B ~ 20 μG. The statistical behaviour of the magnetic vectors shows two preferential directions, almost perpendicular to each other, which are approximately aligned with the flat edges of Puppis A. A third, narrow peak oriented perpendicular to the Galactic plane suggests the existence of an interstellar magnetic field locally aligned in this direction. There is evidence that the magnetic vectors along the shell are aligned with the shock front direction. The low polarization fraction and the statistical behaviour of the magnetic vectors are compatible with a scenario where the SNR evolves inside a stellar wind bubble with a box-like morphology, produced by the interaction of the different stellar winds, one of them magnetized, launched by the SN progenitor. This scenario can furthermore explain the morphology of Puppis A, rendering little support to the previously accepted picture which involved strong density gradients to explain the flat, eastern edge of the shell. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
format	JOUR
author	Reynoso, E.M. Velázquez, P.F. Cichowolski, S.
author_facet	Reynoso, E.M. Velázquez, P.F. Cichowolski, S.
author_sort	Reynoso, E.M.
title	New perspectives on the supernova remnant Puppis A based on a radio polarization study
title_short	New perspectives on the supernova remnant Puppis A based on a radio polarization study
title_full	New perspectives on the supernova remnant Puppis A based on a radio polarization study
title_fullStr	New perspectives on the supernova remnant Puppis A based on a radio polarization study
title_full_unstemmed	New perspectives on the supernova remnant Puppis A based on a radio polarization study
title_sort	new perspectives on the supernova remnant puppis a based on a radio polarization study
url	http://hdl.handle.net/20.500.12110/paper_00358711_v477_n2_p2087_Reynoso
work_keys_str_mv	AT reynosoem newperspectivesonthesupernovaremnantpuppisabasedonaradiopolarizationstudy AT velazquezpf newperspectivesonthesupernovaremnantpuppisabasedonaradiopolarizationstudy AT cichowolskis newperspectivesonthesupernovaremnantpuppisabasedonaradiopolarizationstudy
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New perspectives on the supernova remnant Puppis A based on a radio polarization study

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