Sculpting the Stellar Cusp in the Galactic Center
Xian Chen, Pau Amaro-Seoane

TL;DR
This paper reviews the complex stellar dynamics near the supermassive black hole in the Galactic Center, highlighting observational challenges, theoretical developments, and the impact of the stellar disk on understanding the region's behavior.
Contribution
It synthesizes two decades of observations and theories, emphasizing the role of the stellar disk in resolving dynamical discrepancies in the Galactic Center.
Findings
Stellar structures near Sgr A* challenge classical dynamics
The stellar disk plays a key role in the region's dynamics
Implications for Sgr A*'s recent activity
Abstract
Observations of the innermost parsec surrounding Sgr A ---the supermassive black hole in the center of our Galaxy--- have revealed a diversity of structures whose existence and characteristics apparently defy the fundamental principles of dynamics. In this article, we review the challenges to the dynamics theories that have been brought forth in the past two decades by the observations of the Galactic center (GC). We outline the theoretical framework that has been developed to reconcile the discrepancies between the theoretical predictions and the observational results. In particular, we highlight the role of the recently discovered sub-parsec stellar disk in determining the dynamics and resolving the inconsistencies. We also discuss the implications for the recent activity of Sgr A.
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