Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

TL;DR

This paper investigates the effects of dyonic ModMax black holes on shadows, lensing, quasinormal modes, and neutrino propagation, constraining parameters using observational data and highlighting potential detectability with future space technology.

Contribution

It provides the first comprehensive analysis of shadow, lensing, quasinormal modes, and neutrino effects for dyonic ModMax black holes, including observational constraints.

Findings

Constraints on ModMax parameters from EHT and LIGO/VIRGO data.

Behavior of shadow radius varies with cosmic expansion observer.

Massive particle deflection angles are significantly amplified in the far approximation.

Abstract

Motivated by recent work on the Modified Maxwell (ModMax) black holes [Phys.Lett.B 10.1016/j.physletb.2020.136011], which are invariant in duality rotations and conformal transformations founded in [ Phys.Rev.D 10.1103/PhysRevD.102.121703], we probe its effects on the shadow cast, weak field gravitational lensing, and neutrino propagation in its vicinity. Using the EHT data for the shadow diameter of Sgr. A* and M87*, and LIGO/VIRGO experiments for the dyonic ModMax black hole perturbations, we find constraints for ModMax parameters such as $Q_\text{m}$ and the screening factor $\gamma$. We also analyze how the shadow radius behaves as perceived by a static observer and one that is comoving with the cosmic expansion. The effect of the ModMax parameters is constant for a static observer, and we found That it varies when the observer is comoving with cosmic expansion. We also analyzed its effect on the weak deflection angle by exploiting the Gauss-Bonnet theorem and its application to Einstein ring formation. We also consider the finite distance effect and massive particle deflection. Our results indicate that the far approximation of massive particle gives the largest deflection angle and amplifies the effect of $Q_\text{m}$ and $\gamma$. Then we also calculate the quasinormal modes and greybody bounds which encode unique characteristic features of the dyonic ModMax black hole. With the advent of improving space technology, we reported that it is possible to detect the deviation caused through the shadow cast, Einstein rings, quasinormal modes, and neutrino oscillations.