Absorption of High‐Energy Gamma Rays by Interactions with Extragalactic Starlight Photons at High Redshifts and the High‐Energy Gamma‐Ray Background

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Absorption of High Energy Gamma Rays by Interactions With Starlight Photons in Extragalactic Space at High Redshifts and the High Energy Gamma-Ray Background

In this paper, we extend previous work on the absorption of high energy γ-rays in intergalactic space by calculating the absorption of 10 to 500 GeV γ-rays at high redshifts. This calculation requires the determination of the high-redshift evolution of the intergalactic starlight photon field, including its spectral energy distribution out to frequencies beyond the Lyman limit. To estimate this...

متن کامل

2 v 1 2 0 A ug 1 99 7 Absorption of High Energy Gamma Rays by Interactions with Extragalactic Starlight Photons at High Redshifts

We extend earlier calculations of the attenuation suffered by γ-rays during their propagation from extragalactic sources, obtaining new extinction curves for γ-rays down to 10 GeV in energy, from sources up to a redshift of z = 3. The recognition that high energy γ-rays, propagating over cosmological distances, suffer electron-pair-producing interactions with photons from the extragalactic back...

متن کامل

Extragalactic Absorption of High Energy Gamma-Rays

The pair-production absorption of high-energy -rays by intergalactic low-energy photons is expected to produce a high-energy cuto in the spectra of sources which is a sensitive function of redshift. We rst discuss the expected absorption coe cient as a function of energy and redshift derived by Stecker and De Jager by making use of a new empirically based calculation of the spectral energy dist...

متن کامل

Gamma-ray Absorption at High Redshifts and the Gamma-ray Background

We present results of a calculation of absorption of 10-500 GeV γ-rays at high redshifts (Salamon and Stecker, 1997). This calculation requires the determination of the high redshift evolution of the full spectral energy distribution of the intergalactic photon field. For this, we have primarily followed the recent analysis of Fall, Charlot & Pei. We give our results for the γ-ray opacity as a ...

متن کامل

Blazar Gamma-rays, Shock Acceleration, and the Extragalactic Background Light

The observed spectra of blazars, their intrinsic emission, and the underlying populations of radiating particles are intimately related. The use of these sources as probes of the extragalactic infrared background, a prospect propelled by recent advances in TeV-band telescopes, soon to be augmented by observations by NASA’s upcoming Gamma-Ray Large Area Space Telescope (GLAST), has been a topic ...

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

ژورنال

عنوان ژورنال: The Astrophysical Journal

سال: 1998

ISSN: 0004-637X,1538-4357

DOI: 10.1086/305134