This article is put together in order to clarify the distinction between the phenomena known as Relativistic Doppler Shift and Relativistic Beaming, both of which are pronounced widely in the astrophysics community. The students who are currently studying the topics under the Special Relativity Theory will definitely find this article considerably useful. A few minor changes in the wording were made, and more insightful discussions about the figures were included in the second edition.
As introduced in this paper, Doppler effect explains the frequency shift of the observed photons, whereas the Relativistic Beaming explains the change in the light intensity, due to the motion of the source with respect to the observer.
Relativistic Doppler vs Relativistic Beaming
April 22, 2020