Giant agn flares and cosmic ray bursts

Glennys R. Farrar, Andrei Gruzinov

    Research output: Contribution to journalArticle

    Abstract

    We predict a new class of very intense, short-duration active galactic nucleus (AGN) flares capable of accelerating the highest energy cosmic rays, resulting from the tidal disruption of a star or from a disk instability. The rate and power of these flares readily explains the observed flux and density statistics of ultrahigh energy cosmic ray. The photon bursts produced by the predicted AGN flares are discussed; they may soon be detectable. Observations are shown to exclude that continuous jets of powerful AGNs are the sole source of ultrahigh energy cosmic rays; the stringent requirements for gamma-ray bursts to be the source are delineated.

    Original languageEnglish (US)
    Pages (from-to)329-332
    Number of pages4
    JournalAstrophysical Journal
    Volume693
    Issue number1
    DOIs
    StatePublished - Mar 1 2009

    Fingerprint

    cosmic ray
    flares
    cosmic rays
    bursts
    rays
    active galactic nuclei
    energy
    gamma ray bursts
    statistics
    stars
    requirements
    photons
    rate

    Keywords

    • acceleration of particles
    • accretion, accretion disks
    • galaxies: active
    • gamma rays: bursts
    • instabilities
    • X-rays: bursts

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Giant agn flares and cosmic ray bursts. / Farrar, Glennys R.; Gruzinov, Andrei.

    In: Astrophysical Journal, Vol. 693, No. 1, 01.03.2009, p. 329-332.

    Research output: Contribution to journalArticle

    Farrar, Glennys R. ; Gruzinov, Andrei. / Giant agn flares and cosmic ray bursts. In: Astrophysical Journal. 2009 ; Vol. 693, No. 1. pp. 329-332.
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