The origin of the iron-rich knot in Tycho's supernova remnant

X-ray observations of supernova remnants (SNRs) allow us to investigate the chemical inhomogeneity of ejecta, offering unique insight into the nucleosynthesis in supernova explosions. Here we present detailed imaging and spectroscopic studies of the “Fe knot” located along the eastern rim of the Typ...

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Autores: Yamaguchi, H, Hughes, John P., Badenes Montoliu, Carles, Bravo Guil, Eduardo|||0000-0003-0894-6450, Seitenzahl, Ivo R., Martinez Rodriguez, Hector, Park, Sangwook, Petre, Robert
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/99852
Acceso en línea:https://hdl.handle.net/2117/99852
https://dx.doi.org/10.3847/1538-4357/834/2/124
Access Level:acceso abierto
Palabra clave:Supernovae
ISM: individual objects (SN1572
Tycho's SNR)
ISM: supernova remnants
Nuclear reactions
Nucleosynthesis
Abundances - X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
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oai_identifier_str oai:upcommons.upc.edu:2117/99852
network_acronym_str ES
network_name_str España
repository_id_str
spelling The origin of the iron-rich knot in Tycho's supernova remnantYamaguchi, HHughes, John P.Badenes Montoliu, CarlesBravo Guil, Eduardo|||0000-0003-0894-6450Seitenzahl, Ivo R.Martinez Rodriguez, HectorPark, SangwookPetre, RobertSupernovaeISM: individual objects (SN1572Tycho's SNR)ISM: supernova remnantsNuclear reactionsNucleosynthesisAbundances - X-rays: ISMSupernovesÀrees temàtiques de la UPC::Física::Astronomia i astrofísicaX-ray observations of supernova remnants (SNRs) allow us to investigate the chemical inhomogeneity of ejecta, offering unique insight into the nucleosynthesis in supernova explosions. Here we present detailed imaging and spectroscopic studies of the “Fe knot” located along the eastern rim of the Type Ia SNR Tycho (SN 1572) using Suzaku and Chandra long-exposure data. Surprisingly, the Suzaku spectrum of this knot shows no emission from Cr, Mn, or Ni, which is unusual for the Fe-rich regions in this SNR. Within the framework of the canonical delayed-detonation models for SN Ia, the observed mass ratios M(Cr)/M(Fe) < 0.023 , M(Mn)/M(Fe) < 0.012 , and M(Ni)/M(Fe) < 0.029 (at 90% confidence) can only be achieved for a peak temperature of (5.3–5.7)x10¿ K and a neutron excess of <~ 2.0x10¿³. These constraints rule out the deep, dense core of a Chandrasekhar-mass white dwarf as the origin of the Fe knot and favor either incomplete Si burning or an a-rich freeze-out regime, probably close to the boundary. An explosive He burning regime is a possible alternative, although this hypothesis is in conflict with the main properties of this SNR.Peer Reviewed20172017-01-0920172017-01-23journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/99852https://dx.doi.org/10.3847/1538-4357/834/2/124reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengMinisterio de Economía y Competitividad http://doi.org/10.13039/501100003329 AYA2013-40545-P EXPLOSIONES TERMONUCLEARES EN ENANAS BLANCAS: MODELOS DE ALTA PRECISION Y DATOS OBSERVACIONALES.open accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/998522026-05-27T15:37:01Z
dc.title.none.fl_str_mv The origin of the iron-rich knot in Tycho's supernova remnant
title The origin of the iron-rich knot in Tycho's supernova remnant
spellingShingle The origin of the iron-rich knot in Tycho's supernova remnant
Yamaguchi, H
Supernovae
ISM: individual objects (SN1572
Tycho's SNR)
ISM: supernova remnants
Nuclear reactions
Nucleosynthesis
Abundances - X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
title_short The origin of the iron-rich knot in Tycho's supernova remnant
title_full The origin of the iron-rich knot in Tycho's supernova remnant
title_fullStr The origin of the iron-rich knot in Tycho's supernova remnant
title_full_unstemmed The origin of the iron-rich knot in Tycho's supernova remnant
title_sort The origin of the iron-rich knot in Tycho's supernova remnant
dc.creator.none.fl_str_mv Yamaguchi, H
Hughes, John P.
Badenes Montoliu, Carles
Bravo Guil, Eduardo|||0000-0003-0894-6450
Seitenzahl, Ivo R.
Martinez Rodriguez, Hector
Park, Sangwook
Petre, Robert
author Yamaguchi, H
author_facet Yamaguchi, H
Hughes, John P.
Badenes Montoliu, Carles
Bravo Guil, Eduardo|||0000-0003-0894-6450
Seitenzahl, Ivo R.
Martinez Rodriguez, Hector
Park, Sangwook
Petre, Robert
author_role author
author2 Hughes, John P.
Badenes Montoliu, Carles
Bravo Guil, Eduardo|||0000-0003-0894-6450
Seitenzahl, Ivo R.
Martinez Rodriguez, Hector
Park, Sangwook
Petre, Robert
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Supernovae
ISM: individual objects (SN1572
Tycho's SNR)
ISM: supernova remnants
Nuclear reactions
Nucleosynthesis
Abundances - X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
topic Supernovae
ISM: individual objects (SN1572
Tycho's SNR)
ISM: supernova remnants
Nuclear reactions
Nucleosynthesis
Abundances - X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
description X-ray observations of supernova remnants (SNRs) allow us to investigate the chemical inhomogeneity of ejecta, offering unique insight into the nucleosynthesis in supernova explosions. Here we present detailed imaging and spectroscopic studies of the “Fe knot” located along the eastern rim of the Type Ia SNR Tycho (SN 1572) using Suzaku and Chandra long-exposure data. Surprisingly, the Suzaku spectrum of this knot shows no emission from Cr, Mn, or Ni, which is unusual for the Fe-rich regions in this SNR. Within the framework of the canonical delayed-detonation models for SN Ia, the observed mass ratios M(Cr)/M(Fe) < 0.023 , M(Mn)/M(Fe) < 0.012 , and M(Ni)/M(Fe) < 0.029 (at 90% confidence) can only be achieved for a peak temperature of (5.3–5.7)x10¿ K and a neutron excess of <~ 2.0x10¿³. These constraints rule out the deep, dense core of a Chandrasekhar-mass white dwarf as the origin of the Fe knot and favor either incomplete Si burning or an a-rich freeze-out regime, probably close to the boundary. An explosive He burning regime is a possible alternative, although this hypothesis is in conflict with the main properties of this SNR.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-01-09
2017
2017-01-23
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/99852
https://dx.doi.org/10.3847/1538-4357/834/2/124
url https://hdl.handle.net/2117/99852
https://dx.doi.org/10.3847/1538-4357/834/2/124
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad http://doi.org/10.13039/501100003329 AYA2013-40545-P EXPLOSIONES TERMONUCLEARES EN ENANAS BLANCAS: MODELOS DE ALTA PRECISION Y DATOS OBSERVACIONALES.
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869411675910701056
score 15,301603

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