Late-time behavior of stellar collapse and explosions. II. Nonlinear evolution

Key Points

• This research aims to analyze the radiation behavior during stellar collapse using both linear and nonlinear theories.
• Compared linearized theory predictions with full numerical integration of Einstein equations
• Focused on spherically symmetric scalar field scenarios
• Evaluated cases with and without black hole formation
• Identified power-law tails similar to linear predictions across nonlinear scenarios
• Observed quasinormal ringing behavior consistent with linearized theory
• Demonstrated power-law tails in collapses that do not lead to black holes