Year: 2010
Type: article
Abstract: Attempts to estimate the influence of global cosmological expansion on local systems are reviewed. Here ``local'' is taken to mean that the sizes of the considered systems are much smaller than cosmologically relevant scales. For example, such influences can affect orbital motions as well as configurations of compact objects, like black holes. Also discussed are how measurements based on the exchange of electromagnetic signals of distances, velocities, etc. of moving objects are influenced. As an application, orders of magnitude of such effects are compared with the scale set by the apparently anomalous acceleration of the Pioneer 10 and 11 spacecrafts, which is ${10}^{\ensuremath{-}9}\phantom{\rule{0.3em}{0ex}}\mathrm{m}∕{\mathrm{s}}^{2}$. There is no reason to believe that the latter is of cosmological origin. However, the general problem of gaining a qualitative and quantitative understanding of how the cosmological dynamics influences local systems remains challenging, with only partial clues being so far provided by exact solutions to the field equations of general relativity.
Source: Reviews of Modern Physics
Authors: Matteo Carrera, Domenico Giulini
Institutions: University of Freiburg, Leibniz University Hannover
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: European Space Agency
OpenAlex ID: W2131406270