Particle Motion and Plasma Effects on Gravitational Weak Lensing in Lorentzian Wormhole Spacetime

Galaxies

Bobomurat Ahmedov¹  Sanjar Shaymatov¹  Farruh Atamurotov¹ 

[1] Ulugh Beg Astronomical Institute, Astronomy Street 33, Tashkent 100052, Uzbekistan;

关键词: wormhole;    geodesic orbits;    weak lensing;   

DOI  :  10.3390/galaxies9030054

来源: DOAJ

【 摘 要 】

Here we study particle motion in the specific Lorentzian wormhole spacetime characterized, in addition to the total mass M, with the dimensionless parameter $\mathsf{\lambda }$. In particular we calculate the radius of the innermost stable circular orbit (ISCO) for test particles and the photonsphere for massless particles. We show that the effect of the dimensionless wormhole parameter decreases the ISCO radius and the radius of the photon orbit. Then, we study plasma effects on gravitational weak lensing in wormhole spacetime and obtain the deflection angle of the light. We show that the effect of $\mathsf{\lambda }$ decreases the deflection angle. We study the effects of uniform and non-uniform plasma on the light deflection angle separately, and show that the uniform plasma causes the deflection angle to be smaller in contrast to the non-uniform plasma.

【 授权许可】

Unknown