Ultralight dark matter: constraints from gravitational waves and other
  astrophysical observations
  The orbital period loss of the compact binary systems is the first indirect
evidence of gravitational waves which agrees well with Einstein's general
theory of relativity to a very good accuracy. However, there is less than one
percent uncertainty in the measurement of orbital period loss from the general
reltivistic prediction. Perihelion precession of planets, Gravitational light
bending and Shapiro delay are three other successful tests of general
relativity theory. Though there are uncertainties in the measurements of those
observations from the general reltivistic predictions as well. To resolve these
uncertainties, we assume radiation of ultralight axions and light gauge boson
particles of $L_i-L_j$ type from those systems which can be a possible
candidate of fuzzy dark matter. In this article, we obtain bounds on new
physics parameters from those astrophysical observations.
