Aspects of Neutrino Production in Supernovae

Abstract

I discuss neutrino production in supernovae (SNe) and the detection of both Galactic core collapse events and the diffuse extra-galactic MeV neutrino background expected from the integrated history of star formation. In particular, I consider what processes might affect our expectations for both. I focus on ``rapid'' rotation, defined as leading to millisecond initial neutron star spin periods. Rotation affects the neutrino luminosity, the average neutrino energy, the duration of the Kelvin-Helmholtz cooling epoch, and the ratios of luminosities and average energies between neutrino species; it can strongly suppresses the anti-electron as well as mu, anti-mu, tau, and anti-tau neutrino fluxes relative to those for the electron neutrinos. As a result, depending on the prevalence of rapid rotation in SN progenitors through cosmic time, this may affect predictions for the MeV neutrino background and the history of nucleosynthetic enrichment. I emphasize connections between the MeV neutrino background and tracers of the star formation rate density at high redshift in other neutrino and photon wavebands.

arXiv comment10 pages, 4 figures, proceedings for the International Workshop on the Energy Budget in the High Energy Universe, Kashiwa campus, Univ. of Tokyo, Chiba, Japan, Feb. 2006

References in corpus (4)

• Instability of a stalled accretion shock: evidence for the advective-acoustic cycle
• The Starburst Contribution to the Extra-Galactic Gamma-Ray Background
• Direct Measurement of Supernova Neutrino Emission Parameters with a Gadolinium-Enhanced Super-Kamiokande Detector
• Soft Gamma Repeaters and Anomalous X-ray Pulsars: Magnetar Candidates

Cited by in corpus (2)

• Neutrino-heated winds from millisecond proto-magnetars as sources of the weak r-process
• The Early Evolution of Magnetar Rotation I: Slowly Rotating "Normal" Magnetars