Abstract

Let us assume that the graviton background exists. Then a photon scattering is possible on gravitons γ + h → γ + h, where γ is a photon and h is a graviton, if one of the gravitons is virtual. Average energy losses of a photon in such a process are model-independent and can be written as [1]: dE=-(H/c)E dr, where E is an energy, H is Hubble’s constant, c is the fundamental velocity, and r is a distance to a source. In the first approximation we have the Hubble law for a red shift z but an exact dependence r(z) is the following one: r(z)=cln(1 +z)/H. One can compare it with the Troitsky approximation for the region 3·10^—3 ≤ z ≤ 4: Rz^0.56, where R is constant [2].

© 1996 IEEE