Show simple item record

dc.contributor.authorYamaguchi, H
dc.contributor.authorHughes, John P.
dc.contributor.authorBadenes Montoliu, Carles
dc.contributor.authorBravo Guil, Eduardo
dc.contributor.authorSeitenzahl, Ivo R.
dc.contributor.authorMartinez Rodriguez, Hector
dc.contributor.authorPark, Sangwook
dc.contributor.authorPetre, Robert
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.identifier.citationYamaguchi, H., Hughes, J.P., Badenes, C., Bravo, E., Seitenzahl, I., Martinez, H., Park, S., Petre, R. The origin of the iron-rich knot in Tycho's supernova remnant. "Astrophysical journal", 9 Gener 2017, vol. 834, núm. 2, p. 1-13.
dc.description.abstractX-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.
dc.format.extent13 p.
dc.subjectÀrees temàtiques de la UPC::Física::Astronomia i astrofísica
dc.subject.otherISM: individual objects (SN1572
dc.subject.otherTycho's SNR)
dc.subject.otherISM: supernova remnants
dc.subject.otherNuclear reactions
dc.subject.otherAbundances - X-rays: ISM
dc.titleThe origin of the iron-rich knot in Tycho's supernova remnant
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorYamaguchi, H.; Hughes, J.P.; Badenes, C.; Bravo, E.; Seitenzahl, I.; Martinez, H.; Park, S.; Petre, R.
local.citation.publicationNameAstrophysical journal

Files in this item


This item appears in the following Collection(s)

Show simple item record

All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder