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Books > Science & Mathematics > Physics > Classical mechanics
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Gravity: Where Do We Stand? (Hardcover, 1st ed. 2016)
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Gravity: Where Do We Stand? (Hardcover, 1st ed. 2016)
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This book presents an overview of the current understanding of
gravitation, with a focus on the current efforts to test its
theory, especially general relativity. It shows how the quest for a
deeper theory, which would possibly incorporate gravity in the
quantum realm, is more than ever an open field. The majority of the
contributions deals with the manifold facets of "experimental
gravitation", but the book goes beyond this and covers a broad
range of subjects from the foundations of gravitational theories to
astrophysics and cosmology. The book is divided into three parts.
The first part deals with foundations and Solar System tests. An
introductory pedagogical chapter reviews first Newtonian
gravitational theory, special relativity, the equivalence principle
and the basics of general relativity. Then it focuses on
approximation methods, mainly the post-Newtonian formalism and the
relaxed Einstein equations, with a discussion on how they are used
in treating experimental tests and in the problem of generation and
detection of gravitational waves. Following this is a set of
chapters describing the most recent experiments, techniques and
observations on the testing of gravity theories in the laboratory,
around the Earth and in the Solar System. The second part is
dedicated to astrophysical topics deeply linked with the study of
gravitation, namely binary pulsars and the perspective of direct
detection of gravitational waves. These cases are paradigmatic in
that the gravitational signals act at the same time as messengers
helping us to understand the properties of important and wide
classes of astrophysical objects. The third part explores the many
open issues in current knowledge of gravitation machinery,
especially related to astrophysical and cosmological problems and
the way possible solutions to them impact the quest for a quantum
theory of gravitation and unified theory. Included is a selection
of the many possible paths, giving a hint to the subtleties one is
called upon. Whenever possible, a close link to observational
constraints and possible experimental tests is provided. In
selecting the topics of the various contributions, particular care
has been devoted to ensure their fit in a coherent representation
of our understanding of gravitational phenomena. The book is aimed
at graduate level students and will form a valuable reference for
those working in the field.
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