  We give a linear response relation for perturbations in relativistic stars
and classify them in terms of implicit and induced perturbations. The focus in
this article is on the induced perturbations which may arise due to internal
sources in dense matter compact objects. Based on the linear response relation,
an Einstein Langevin equation is given and its solutions for a simple case are
obtained in closed analytical form as a first exercise. Our results show how
perturbations in relativistic stars can arise due to a cumulative effect of
mesoscopic scale fluctuations in the dense matter fluids, which otherwise seem
to be screened off at hydrodynamic scales due to averaging. We discuss the
relevance of such a framework and its potential towards building up a theme of
research in asteroseismology using a first principles approach.
