A Search for Ultrahigh-Energy Gamma Rays from EGRET-detected Active Galactic Nuclei Using CASA-MIA

1996 ◽  
Vol 469 ◽  
pp. 572 ◽  
Author(s):  
M. Catanese ◽  
A. Borione ◽  
C. E. Covault ◽  
J. W. Cronin ◽  
B. E. Fick ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Rays ◽  
Galactic Nuclei ◽  
Ultrahigh Energy ◽  
Energy Gamma

scholarly journals A Search for Very High Energy Gamma Rays from Active Galactic Nuclei Visible from the Southern Hemisphere

1999 ◽  
Vol 521 (2) ◽  
pp. 547-551 ◽  
Author(s):  
P. M. Chadwick ◽  
K. Lyons ◽  
T. J. L. McComb ◽  
K. J. Orford ◽  
J. L. Osborne ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Southern Hemisphere ◽  
Gamma Rays ◽  
Galactic Nuclei ◽  
High Energy ◽  
High Energy Gamma ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High

scholarly journals Gamma Rays and Jets in Active Galactic Nuclei

1994 ◽  
Vol 159 ◽  
pp. 381-381
Author(s):  
Donald Meyer
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Rays ◽  
Galactic Nuclei ◽  
High Energy ◽  
High Energy Gamma ◽  
Energy Gamma

It will be shown that the jets observed in AGN's are the result of the high energy gamma rays recently observed by the EGRET and Whipple collaborations interacting with a medium of density typical of that expected in galaxies. All of the observed properties of the jets follow from this interaction.

scholarly journals TeV Gamma Rays from Ultrahigh Energy Cosmic Ray Interactions in the Cores of Active Galactic Nuclei: Lessons from Centaurus A

2010 ◽  
Vol 27 (4) ◽  
pp. 482-489 ◽  
Author(s):  
M. Kachelrieß ◽  
S. Ostapchenko ◽  
R. Tomàs
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Rays ◽  
Galactic Nuclei ◽  
Cosmic Ray ◽  
Far Infrared ◽  
High Energy ◽  
Ultrahigh Energy ◽  
Very High Energy ◽  
Tev Gamma Rays ◽  
Centaurus A

AbstractTeV gamma rays have been observed from blazars as well as from radio galaxies like M 87 and Centaurus A. In leptonic models, gamma rays above the pair production threshold can escape from the ultrarelativistic jet, because large Lorentz factors reduce the background photon densities compared to those required for isotropic emission. Here we discuss an alternative scenario, where very high energy photons are generated as secondaries from ultrahigh energy cosmic rays interactions in the cores of active galactic nuclei. We show that TeV gamma-rays can escape from the core despite large infrared and ultraviolet backgrounds. For the special case of Centaurus A, we study whether the various existing observations from the far infrared to the ultrahigh energy range can be reconciled within this picture.

On the ultrahigh-energy gamma rays from Cygnus X-3

1982 ◽  
Vol 261 ◽  
pp. 251 ◽  
Author(s):  
W. T. Vestrand ◽  
D. Eichler
Keyword(s):  
Gamma Rays ◽  
Ultrahigh Energy ◽  
Energy Gamma
Sign in / Sign up

Export Citation Format

Share Document