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Behrooz Malekolkalami

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId: 654654
Faculty: Faculty of Science
Address:
Phone: 09188711601

Research

Title
Geodesics around oscillatons made of exponential scalar field potential
Type
JournalPaper
Keywords
Einstein–Klein–Gordon equations; Metric functions; Oscillaton; Geodesics
Year
2018
Journal ASTROPHYSICS AND SPACE SCIENCE
DOI
Researchers Ali Mahmoodzadeh ، Behrooz Malekolkalami

Abstract

Some of the spherically symmetric solutions to the Einstein–Klein–Gordon (EKG) equations can describe the astronomical soliton objects made of a real time-dependent scalar fields. The solutions are known as oscillatons which are non-singular satisfying the flatness conditions asymptotically with periodic (separated) timedependency. In this paper, we investigate the geodesic motion around an oscillaton. The Spherically Symmetric Geometry allows the bound orbits in the plan θ = π/2 under a given initial conditions. The potential for the scalar field Φ = Φ(r, t), is an exponential function of the form V (Φ) = V0 exp(λ √ k0Φ).