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Supernova Matter at Subnuclear Densities as a Resonant Fermi Gas: Enhancement of Neutrino Rates
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Univ Copenhagen, Denmark.
2014 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 113, no 8, 081101- p.Article in journal (Refereed) Published
Abstract [en]

At low energies nucleon-nucleon interactions are resonant and therefore supernova matter at subnuclear densities has many similarities to atomic gases with interactions dominated by a Feshbach resonance. We calculate the rates of neutrino processes involving nucleon-nucleon collisions and show that these are enhanced in mixtures of neutrons and protons at subnuclear densities due to the large scattering lengths. As a result, the rate for neutrino pair bremsstrahlung and absorption is significantly larger below 10(13) g cm(-3) compared to rates used in supernova simulations.

Place, publisher, year, edition, pages
2014. Vol. 113, no 8, 081101- p.
Keyword [en]
Nucleon-Scattering Data, Stars, Emissivities
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-152578DOI: 10.1103/PhysRevLett.113.081101ISI: 000341247600002Scopus ID: 2-s2.0-84907305592OAI: oai:DiVA.org:kth-152578DiVA: diva2:750744
Note

QC 20140930

Available from: 2014-09-30 Created: 2014-09-29 Last updated: 2017-12-05Bibliographically approved

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