1,248 research outputs found
Geodesic properties in terms of multipole moments in scalar-tensor theories of gravity
The formalism for describing a metric and the corresponding scalar in terms
of multipole moments has recently been developed for scalar-tensor theories. We
take advantage of this formalism in order to obtain expressions for the
observables that characterise geodesics in terms of the moments. These
expressions provide some insight into how the structure of a scalarized compact
object affects observables. They can also be used to understand how deviations
from general relativity are imprinted on the observables.Comment: 16 page
Multipole moments in scalar-tensor theory of gravity
Stationary, asymptotically flat spacetimes in general relativity can be
characterized by their multipole moments. The moments have proved to be very
useful tools for extracting information about the spacetime from various
observables and, more recently, for establishing universalities in the
structure of neutron stars. As a first step toward extending these methods
beyond general relativity, we develop the formalism that allows one to define
and calculate the multipole moments in scalar-tensor theories of gravity.Comment: 12 pages, references added, accepted for publication as a Regular
Article in Physical Review
Encycloreedia: A Beginning Guide to Oboe Reed Making
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