Asset Details
Do you wish to reserve the book?
Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87∗ and Sgr. A∗ results
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87∗ and Sgr. A∗ results
Do you wish to request the book?
Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87∗ and Sgr. A∗ results
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Testing symmergent gravity through the shadow image and weak field photon deflection by a rotating black hole using the M87∗ and Sgr. A∗ results
2023
Overview
In this paper, we study rotating black holes in symmergent gravity, and use deviations from the Kerr black hole to constrain the parameters of the symmergent gravity. Symmergent gravity induces the gravitational constant
G
and quadratic curvature coefficient
c
O
from the flat spacetime matter loops. In the limit in which all fields are degenerate in mass, the vacuum energy
V
O
can be wholly expressed in terms of
G
and
c
O
. We parametrize deviation from this degenerate limit by a parameter
α
^
such that the black hole spacetime is dS for
α
^
<
1
and AdS for
α
^
>
1
. In constraining the symmergent parameters
c
O
and
α
^
, we utilize the EHT observations on the M87* and Sgr. A* black holes. We investigate first the modifications in the photon sphere and shadow size, and find significant deviations in the photonsphere radius and the shadow radius with respect to the Kerr solution. We also find that the geodesics of time-like particles are more sensitive to symmergent gravity effects than the null geodesics. Finally, we analyze the weak field limit of the deflection angle, where we use the Gauss-Bonnet theorem for taking into account the finite distance of the source and the receiver to the lensing object. Remarkably, the distance of the receiver (or source) from the lensing object greatly influences the deflection angle. Moreover,
c
O
needs be negative for a consistent solution. In our analysis, the rotating black hole acts as a particle accelerator and possesses the sensitivity to probe the symmergent gravity.
Publisher
Springer Berlin Heidelberg,Springer,Springer Nature B.V
Subject
We currently cannot retrieve any items related to this title. Kindly check back at a later time.