Cosmic gamma-ray background from Type Ia supernovae revisited: Evidence for missing gamma-rays at MeV

Abstract

The observed cosmic gamma-ray background at ~ MeV has often been attributed to Type Ia supernovae (SNIa). Since SNIa is close to a standard candle, one can calculate the gamma-ray intensity of SNIa integrated over redshifts fairly accurately, once the evolution of the SNIa rate is known. The latest SNIa rate measured at z < ~1.6 (Dahlen et al. 2004) indicates that the previous calculations of the gamma-ray background consistently overestimated the SNIa rate. With the new rate, we find that the SNIa contribution is an order of magnitude smaller than observed, and thus new population(s) of sources should be invoked.

4 pages, 2 figures; Accepted for publication in Physical Review D

References in corpus (5)

• The Hubble Higher-Z Supernova Search: Supernovae to z=1.6 and Constraints on Type Ia Progenitor Models
• High Redshift Supernova Rates
• Gamma-Ray Constraint on Galactic Positron Production by MeV Dark Matter
• The Concordance Cosmic Star Formation Rate: Implications from and for the Supernova Neutrino and Gamma Ray Backgrounds
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Cited by in corpus (24)

• The Type Ia Supernova Rate
• The Evolution of Swift/BAT blazars and the origin of the MeV background
• Contribution of the Gamma-ray Loud Radio Galaxies Core Emissions to the Cosmic MeV and GeV Gamma-Ray Background Radiation
• Anisotropy of the cosmic gamma-ray background from dark matter annihilation
• The nature of the Diffuse Gamma-Ray Background
• Dark matter annihilation or unresolved astrophysical sources? Anisotropy probe of the origin of cosmic gamma-ray background
• Cold Dark Matter as Compact Composite Objects
• Circumscribing Late Dark Matter Decays Model Independently
• The Star-Forming Galaxy Contribution to the Cosmic MeV and GeV Gamma-Ray Background
• The Cosmic MeV Gamma-ray Background and Hard X-ray Spectra of Active Galactic Nuclei: Implications for the Origin of Hot AGN Coronae
• Resolving Cosmic Gamma Ray Anomalies with Dark Matter Decaying Now
• Dark Matter Annihilation: the origin of cosmic gamma-ray background at 1-20 MeV
• Revealing Type Ia supernova physics with cosmic rates and nuclear gamma rays
• Axino Light Dark Matter and Neutrino Masses with R-parity Violation
• Diffuse MeV Gamma-rays and Galactic 511 keV Line from Decaying WIMP Dark Matter
• Diffuse cosmic gamma-rays at 1-20 MeV: A trace of the dark matter?
• Width of the 511 KeV Line from the Bulge of the Galaxy
• Metastable dark matter mechanisms for INTEGRAL 511 keV $\gamma$ rays and DAMA/CoGeNT events
• Dark stars: Implications and constraints from cosmic reionization and extragalactic background radiation
• Soft gamma-ray background and light Dark Matter annihilation
• Exciting dark matter in the galactic center
• Abelian dark matter models for 511 keV gamma rays and direct detection
• Cosmic constraints rule out s-wave annihilation of light dark matter
• Dark matter annihilation at cosmological redshifts: possible relic signal from annihilation of weakly interacting massive particles