Long GRBs and massive stellar explosions from frame dragging around rotating black holes

TL;DR

This paper proposes that long GRBs originate from rotating black holes with frame dragging, producing high-frequency modulations in gamma-ray emissions due to turbulence, and predicts associated gravitational wave signals.

Contribution

It introduces a mechanism linking frame dragging around rotating black holes to high-frequency signatures in GRB emissions and gravitational waves, supported by spectral analysis of BeppoSax data.

Findings

Detection of high-frequency modulations up to 1000 Hz in GRB data.

Power-law spectral behavior consistent with turbulence near black hole ISCO.

Predicted gravitational wave signatures correlated with gamma-ray turbulence.

Abstract

The most energetic GRB-supernovae probably derive from rotating stellar mass black holes. Based on BeppoSax data, we identify a mechanism for exploding a remnant stellar envelope by disk winds. A specific signature is high frequency modulations in the accompanying prompt GRB emission from dissipation in high energy emissions along the black hole spin axis due, in part, to forced turbulence in the inner disk or torus mediated by frame dragging. A majority of long GRBs are found to have significant autocorrelation below 10 Hz with chirps extending up to 1000 Hz. Their comoving Fourier spectra satisfy a power law with index $\alpha\simeq-0.82$ up to about one hundred Hz and comoving chirp spectra show broken power laws with $\alpha\simeq-0.65$ up to 10 Hz, $\alpha\simeq-0.25$ up to a few hundred Hz and $\alpha\simeq0$ beyond. These high frequency signatures are the most direct signature of long-lived turbulence down to the ISCO of rotating black holes, pointing directly accompanying long duration bursts in gravitational wave emission.