A resonance model with magnetic connection for 3:2 HFQPO pairs in black hole binaries

TL;DR

This paper proposes a resonance model incorporating magnetic connections to explain 3:2 high-frequency QPO pairs in black hole binaries, linking observed oscillations to BH spin and disc interactions.

Contribution

It introduces a novel resonance model with magnetic connection that accounts for HFQPOs and their association with steep power-law states in black hole binaries.

Findings

3:2 HFQPO pairs linked to magnetic connection in BH systems

Energy transfer from BH spin to inner disc overcomes damping

Model explains HFQPOs in specific spectral states

Abstract

We apply epicyclic resonances to the magnetic connection (MC) of a black hole (BH) with a relativistic accretion disc, interpreting the high frequency quasi-periodic oscillations (HFQPOs) with 3:2 pairs observed in three BH X-ray binaries. It turns out that the 3:2 HFQPO pairs are associated with the steep power-law states, and the severe damping can be overcome by transferring energy and angular momentum from a spinning BH to the inner disc in the MC process.