Properties of accretion disc models in the background with quadrupoles

TL;DR

This paper investigates how quadrupole moments in a static, axially symmetric spacetime influence accretion disc properties and oscillation frequencies, comparing results with Schwarzschild and Kerr black hole models.

Contribution

It introduces a metric with two quadrupole parameters and analyzes their effects on accretion disc dynamics and oscillation frequencies, extending beyond traditional black hole models.

Findings

Quadrupole moments significantly affect accretion disc properties.

Oscillatory frequencies relate to observed high-frequency QPOs in microquasars.

Results differ from Schwarzschild and Kerr predictions.

Abstract

We consider a static and axially symmetric metric containing two quadrupole parameters. In the present contribution, we study the quadrupole moments constraints on the properties of the relativistic accretion disc models, also explore the relation of oscillatory frequencies of charged particles to the frequencies of the twin high-frequency quasi-periodic oscillations observed in some microquasars. We also compare the results with Schwarzschild and Kerr metrics.