Hot Spots in Sgr A* Accretion Disk: Hydrodynamic Insights

TL;DR

This paper proposes a hydrodynamic model suggesting that the hot spots observed in Sgr A*'s accretion disk are interconnected parts of a single rotating macro-structure, providing new insights into black hole accretion dynamics.

Contribution

It introduces an analytical framework that explains hot spots as causally linked components of a macro-structure, challenging the view of hot spots as independent features.

Findings

Hot spots are linked parts of a macro-structure in the accretion disk.

The model explains hot spot formation through thermo-vorticial fields.

Supports a unified view of hot spots in black hole accretion disks.

Abstract

The recent image of our galaxy's supermassive black hole Sgr A* derived from the 7 April 2017 data of the Event Horizon Telescope Collaboration shows multiple hot spots in its accretion disk. Using the analytical framework, we demonstrate that the observed hot spots may not be disjoint elements but causally linked components ("petals") of one rotating quasi-stationary macro-structure formed in the thermo-vorticial field within the accretion disk.