Post-Newtonian parameter γ and the deflection of light in ghost-free massive bimetric gravity

Post-Newtonian parameter γ and the deflection of light in ghost-free massive bimetric gravity We consider the parametrized post-Newtonian (PPN) limit of ghost-free massive bimetric gravity with two mutually noninteracting matter sectors coupled to the two metrics. Making use of a gauge-invariant differential decomposition of the metric perturbations, we solve the field equations up to the linear PPN order for a static, pointlike mass source. From the result, we derive the PPN parameter γ for spherically symmetric systems, which describes the gravitational deflection of light by visible matter. By a comparison to its value measured in the Solar System, we obtain bounds on the parameters of the theory. We further discuss the deflection of light by dark matter and find an agreement with the observed light deflection by galaxies. We finally speculate about a possible explanation for the observed distribution of dark matter in galactic mergers such as Abell 520 and Abell 3827. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Post-Newtonian parameter γ and the deflection of light in ghost-free massive bimetric gravity

Preview Only

Post-Newtonian parameter γ and the deflection of light in ghost-free massive bimetric gravity

Abstract

We consider the parametrized post-Newtonian (PPN) limit of ghost-free massive bimetric gravity with two mutually noninteracting matter sectors coupled to the two metrics. Making use of a gauge-invariant differential decomposition of the metric perturbations, we solve the field equations up to the linear PPN order for a static, pointlike mass source. From the result, we derive the PPN parameter γ for spherically symmetric systems, which describes the gravitational deflection of light by visible matter. By a comparison to its value measured in the Solar System, we obtain bounds on the parameters of the theory. We further discuss the deflection of light by dark matter and find an agreement with the observed light deflection by galaxies. We finally speculate about a possible explanation for the observed distribution of dark matter in galactic mergers such as Abell 520 and Abell 3827.
Loading next page...
 
/lp/aps_physical/post-newtonian-parameter-and-the-deflection-of-light-in-ghost-free-T54y7mQbci
Publisher
American Physical Society (APS)
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.95.124049
Publisher site
See Article on Publisher Site

Abstract

We consider the parametrized post-Newtonian (PPN) limit of ghost-free massive bimetric gravity with two mutually noninteracting matter sectors coupled to the two metrics. Making use of a gauge-invariant differential decomposition of the metric perturbations, we solve the field equations up to the linear PPN order for a static, pointlike mass source. From the result, we derive the PPN parameter γ for spherically symmetric systems, which describes the gravitational deflection of light by visible matter. By a comparison to its value measured in the Solar System, we obtain bounds on the parameters of the theory. We further discuss the deflection of light by dark matter and find an agreement with the observed light deflection by galaxies. We finally speculate about a possible explanation for the observed distribution of dark matter in galactic mergers such as Abell 520 and Abell 3827.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jun 15, 2017

There are no references for this article.

Sorry, we don’t have permission to share this article on DeepDyve,
but here are related articles that you can start reading right now:

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off