Are Extragalactic Gamma Ray Bursts The Source Of The Highest Energy Cosmic Rays?

نویسنده

  • Arnon Dar
چکیده

Recent observations with the large air shower arrays of ultra high energy cosmic rays (UHECR) and recent measurements/estimates of the redshifts of gamma ray bursts (GRBs) seem to rule out extragalactic GRBs as the source of the cosmic rays that are observed near Earth, including those with the highest energies. Subject headings: cosmic rays; gamma rays bursts

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Violation of the Greisen-Zatsepin-Kuzmin cutoff: a tempest in a (magnetic) Teapot? Why cosmic ray energies above 10(20) eV may not require new physics.

The apparent lack of suitable astrophysical sources for the observed highest energy cosmic rays within approximately 20 Mpc is the "Greisen-Zatsepin-Kuzmin (GZK) paradox." We constrain representative models of the extragalactic magnetic field structure by Faraday rotation measurements; limits are at the microG level rather than the nG level usually assumed. In such fields, even the highest ener...

متن کامل

ar X iv : a st ro - p h / 98 11 19 6 v 1 1 2 N ov 1 99 8 Comment on “ Cosmological Gamma Ray Bursts and the Highest Energy Cosmic Rays ”

In a letter with the above title, published some time ago in PRL, Waxman [1] made the interesting suggestion that cosmological gamma ray bursts (GRBs) are the source of the ultra high energy cosmic rays (UHECR). This has also been proposed independently by Milgrom and Usov [2] and by Vietri [3]. However, here I show that the recent data from AGASA [4], which does not show the suppression in the...

متن کامل

On Gamma Ray Burst and Blazar AGN Origins of the Ultra-High Energy Cosmic Rays in Light of First Results from Auger

The discoveries of the GZK cutoff with the HiRes and Auger Observatories and the discovery by Auger of clustering of > ∼ 60 EeV ultra-high energy cosmic rays (UHECRs) towards nearby ( < ∼ 75 Mpc) AGNs along the supergalactic plane establishes the astrophysical origin of the UHECRs. The likely sources of the UHECRs are gamma-ray bursts and radio-loud AGNs because: (1) they are extragalactic; (2)...

متن کامل

Coronal Gamma Ray Bursts as the sources of Ultra High Energy Cosmic Rays?

I consider the possibility that Ultra High Energy Cosmic Rays are accelerated in Gamma Ray Bursts located in the Galactic corona, thus circumventing the problem raised by Greisen–Zatsepin–Kuz’min cutoff. The acceleration of UHECRs could occur in the pulsars which, in the coronal GRB model, produce them: the same parameters that permit fitting GRBs’ observations in the model of Podsiadlowski, Re...

متن کامل

ar X iv : a st ro - p h / 98 12 05 5 v 1 3 D ec 1 99 8 ADP - AT - 98 - 9 Acceleration and Interaction of Ultra High Energy Cosmic Rays

In this chapter I give an overview of shock acceleration , including a discussion of the maximum energies possible and the shape of the spectrum near cutoff , interactions of high energy cosmic rays with, and propagation through, the background radiation, and the resulting electron-photon cascade. Possible sources of the highest energy cosmic rays are discussed including active galaxies , gamma...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1999