Secondary photons from high-energy protons accelerated in hypernovae

Katsuaki Asano, Peter Mészarós

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Recent observations show that hypernovae may deposit some fraction of their kinetic energy in mildly relativistic ejecta. In the dissipation process of such ejecta in a stellar wind, cosmic-ray protons can be accelerated up to ∼1019 eV. We discuss the TeV to MeV gamma-ray and the X-ray photon signatures of cosmic rays accelerated in hypernovae. Secondary X-ray photons, emitted by electron-positron pairs produced via cascade processes due to high-energy protons, are the most promising targets for X-ray telescopes. Synchrotron photons emitted by protons can appear in the GeV band, requiring nearby (<40 Mpc) hypernovae for detection with GLAST. In addition, air Cerenkov telescopes may be able to detect regenerated TeV photons emitted by electron-positron pairs generated by CMB attenuation of π0-decay photons.

Original languageEnglish (US)
Pages (from-to)L31-L34
JournalAstrophysical Journal
Issue number1 PART 2
StatePublished - 2008

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'Secondary photons from high-energy protons accelerated in hypernovae'. Together they form a unique fingerprint.

Cite this