A Super-solar metallicity for the progenitor of Kepler's supernova

We have performed deep X-ray observations of the remnant of Kepler's supernova (SN 1604) as a Key Project of the Suzaku Observatory. Our main goal is to detect secondary Fe-peak elements in the supernova (SN) ejecta to gain insights into the Type Ia SN explosion mechanism and the nature of the...

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Autores: Park, Sangwook, Badenes Montoliu, Carles, Mori, Koji, Kaida, Ryohei, Bravo Guil, Eduardo|||0000-0003-0894-6450, Schenck, Andrew, Eriksen, Kristoffer A., Hughes, John P., Slane, Patrick O., Burrows, David N., Lee, Jae-Joon
Formato: artículo
Fecha de publicación:2013
País:España
Recursos:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/22750
Acesso em linha:https://hdl.handle.net/2117/22750
https://dx.doi.org/10.1088/2041-8205/767/1/L10
Access Level:acceso abierto
Palavra-chave:Supernovae
ISM: individual objects (Kepler's supernova remnants)
ISM: supernova remnants
X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
id ES_e6b3bf4ba229f2f9baf4cb3b81dc3c55
oai_identifier_str oai:upcommons.upc.edu:2117/22750
network_acronym_str ES
network_name_str España
repository_id_str
spelling A Super-solar metallicity for the progenitor of Kepler's supernovaPark, SangwookBadenes Montoliu, CarlesMori, KojiKaida, RyoheiBravo Guil, Eduardo|||0000-0003-0894-6450Schenck, AndrewEriksen, Kristoffer A.Hughes, John P.Slane, Patrick O.Burrows, David N.Lee, Jae-JoonSupernovaeISM: individual objects (Kepler's supernova remnants)ISM: supernova remnantsX-rays: ISMSupernovesÀrees temàtiques de la UPC::Física::Astronomia i astrofísicaWe have performed deep X-ray observations of the remnant of Kepler's supernova (SN 1604) as a Key Project of the Suzaku Observatory. Our main goal is to detect secondary Fe-peak elements in the supernova (SN) ejecta to gain insights into the Type Ia SN explosion mechanism and the nature of the progenitor. Here, we report our initial results. We made a conclusive detection of X-ray emission lines from highly ionized Mn, Cr, and Ni as well as Fe. The observed Mn-to-Cr line flux ratio is ~0.60, ~30% larger than that measured in Tycho's remnant. We estimate an Mn-to-Cr mass ratio of ~0.77, which is strongly suggestive of a large neutron excess in the progenitor star before the onset of the thermonuclear runaway. The observed Ni-to-Fe line flux ratio (~0.03) corresponds to a mass ratio of ~0.06, which is generally consistent with the products of the explosive Si-burning regime in Type Ia explosion models, and rules out contamination from the products of neutron-rich nuclear statistical equilibrium in the shocked ejecta. Together with the previously suggested luminous nature of the explosion, these mass ratios provide strong evidence for a super-solar metallicity in the SN progenitor (~3 Z ¿). Kepler's SN was likely the thermonuclear explosion of a white dwarf formed in the recent past that must have exploded through a relatively prompt channel.Peer Reviewed20132013-04-0120142014-04-29journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/22750https://dx.doi.org/10.1088/2041-8205/767/1/L10reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/227502026-05-27T15:37:01Z
dc.title.none.fl_str_mv A Super-solar metallicity for the progenitor of Kepler's supernova
title A Super-solar metallicity for the progenitor of Kepler's supernova
spellingShingle A Super-solar metallicity for the progenitor of Kepler's supernova
Park, Sangwook
Supernovae
ISM: individual objects (Kepler's supernova remnants)
ISM: supernova remnants
X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
title_short A Super-solar metallicity for the progenitor of Kepler's supernova
title_full A Super-solar metallicity for the progenitor of Kepler's supernova
title_fullStr A Super-solar metallicity for the progenitor of Kepler's supernova
title_full_unstemmed A Super-solar metallicity for the progenitor of Kepler's supernova
title_sort A Super-solar metallicity for the progenitor of Kepler's supernova
dc.creator.none.fl_str_mv Park, Sangwook
Badenes Montoliu, Carles
Mori, Koji
Kaida, Ryohei
Bravo Guil, Eduardo|||0000-0003-0894-6450
Schenck, Andrew
Eriksen, Kristoffer A.
Hughes, John P.
Slane, Patrick O.
Burrows, David N.
Lee, Jae-Joon
author Park, Sangwook
author_facet Park, Sangwook
Badenes Montoliu, Carles
Mori, Koji
Kaida, Ryohei
Bravo Guil, Eduardo|||0000-0003-0894-6450
Schenck, Andrew
Eriksen, Kristoffer A.
Hughes, John P.
Slane, Patrick O.
Burrows, David N.
Lee, Jae-Joon
author_role author
author2 Badenes Montoliu, Carles
Mori, Koji
Kaida, Ryohei
Bravo Guil, Eduardo|||0000-0003-0894-6450
Schenck, Andrew
Eriksen, Kristoffer A.
Hughes, John P.
Slane, Patrick O.
Burrows, David N.
Lee, Jae-Joon
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Supernovae
ISM: individual objects (Kepler's supernova remnants)
ISM: supernova remnants
X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
topic Supernovae
ISM: individual objects (Kepler's supernova remnants)
ISM: supernova remnants
X-rays: ISM
Supernoves
Àrees temàtiques de la UPC::Física::Astronomia i astrofísica
description We have performed deep X-ray observations of the remnant of Kepler's supernova (SN 1604) as a Key Project of the Suzaku Observatory. Our main goal is to detect secondary Fe-peak elements in the supernova (SN) ejecta to gain insights into the Type Ia SN explosion mechanism and the nature of the progenitor. Here, we report our initial results. We made a conclusive detection of X-ray emission lines from highly ionized Mn, Cr, and Ni as well as Fe. The observed Mn-to-Cr line flux ratio is ~0.60, ~30% larger than that measured in Tycho's remnant. We estimate an Mn-to-Cr mass ratio of ~0.77, which is strongly suggestive of a large neutron excess in the progenitor star before the onset of the thermonuclear runaway. The observed Ni-to-Fe line flux ratio (~0.03) corresponds to a mass ratio of ~0.06, which is generally consistent with the products of the explosive Si-burning regime in Type Ia explosion models, and rules out contamination from the products of neutron-rich nuclear statistical equilibrium in the shocked ejecta. Together with the previously suggested luminous nature of the explosion, these mass ratios provide strong evidence for a super-solar metallicity in the SN progenitor (~3 Z ¿). Kepler's SN was likely the thermonuclear explosion of a white dwarf formed in the recent past that must have exploded through a relatively prompt channel.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-04-01
2014
2014-04-29
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/22750
https://dx.doi.org/10.1088/2041-8205/767/1/L10
url https://hdl.handle.net/2117/22750
https://dx.doi.org/10.1088/2041-8205/767/1/L10
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
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_ 1869422789844271104
score 15,300719

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