Skip navigation
Skip navigation

Implications of low-energy fusion hindrance on stellar burning and nucleosynthesis

Gasques , Leandro; Brown, E.F.; Chieffi, A.; Jiang, C L; Limongi, M.; Rolfs, C.; Wiescher, M.; Yakovlev, D G

Description

We investigate the consequences of a new phenomenological model prediction of strongly reduced low-energy astrophysical S-factors for carbon and oxygen fusion reactions on stellar burning and nucleosynthesis. The new model drastically reduces the reaction rates in stellar matter at temperatures Tâ‰(3-10)à 108 K, especially at densities Ïâ‰109 g cm-3, in a strongly screened or even pycnonuclear burning regime. We show that these modifications change the abundance of many isotopes in massive...[Show more]

dc.contributor.authorGasques , Leandro
dc.contributor.authorBrown, E.F.
dc.contributor.authorChieffi, A.
dc.contributor.authorJiang, C L
dc.contributor.authorLimongi, M.
dc.contributor.authorRolfs, C.
dc.contributor.authorWiescher, M.
dc.contributor.authorYakovlev, D G
dc.date.accessioned2015-12-08T22:33:30Z
dc.identifier.issn0556-2813
dc.identifier.urihttp://hdl.handle.net/1885/34709
dc.description.abstractWe investigate the consequences of a new phenomenological model prediction of strongly reduced low-energy astrophysical S-factors for carbon and oxygen fusion reactions on stellar burning and nucleosynthesis. The new model drastically reduces the reaction rates in stellar matter at temperatures Tâ‰(3-10)à 108 K, especially at densities Ïâ‰109 g cm-3, in a strongly screened or even pycnonuclear burning regime. We show that these modifications change the abundance of many isotopes in massive late-type stars and in particular strongly enhance the abundances of long-lived radioactive isotopes such as Al26 and Fe60. The reduced reaction rates also significantly complicate carbon ignition (shift carbon ignition to higher temperatures and densities) in massive accreting white dwarfs exploding as type Ia supernovae and in accreting neutron stars producing superbursts. This would require much higher ignition densities for white dwarf supernovae and would widen the gulf between theoretical and inferred ignition depths for superbursts.
dc.publisherAmerican Physical Society
dc.sourcePhysical Review C: Nuclear Physics
dc.titleImplications of low-energy fusion hindrance on stellar burning and nucleosynthesis
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume76
dc.date.issued2007
local.identifier.absfor020203 - Particle Physics
local.identifier.ariespublicationu4155331xPUB116
local.type.statusPublished Version
local.contributor.affiliationGasques , Leandro , College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationBrown, E.F., Michigan State University
local.contributor.affiliationChieffi, A., INAF-Osservatorio Astronomico di Roma
local.contributor.affiliationJiang, C L, Argonne National Laboratory
local.contributor.affiliationLimongi, M., INAF-Osservatorio Astronomico di Roma
local.contributor.affiliationRolfs, C., Ruhr-University Bochum
local.contributor.affiliationWiescher, M., University of Notre Dame
local.contributor.affiliationYakovlev, D G, Ioffe Physico-Technical Institute
local.description.embargo2037-12-31
local.bibliographicCitation.startpage035802 1
local.bibliographicCitation.lastpage10
local.identifier.doi10.1103/PhysRevC.76.035802
dc.date.updated2015-12-08T09:36:22Z
local.identifier.scopusID2-s2.0-34548816715
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Gasques _Implications_of_low-energy_2007.pdf769.58 kBAdobe PDF    Request a copy


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator