Research Paper#Astrophysics, Gamma-Ray Bursts, Kilonovae, Neutron Star Mergers🔬 ResearchAnalyzed: Jan 3, 2026 18:57
Progenitor Properties of Merger-Driven Gamma-Ray Bursts
Published:Dec 29, 2025 10:34
•1 min read
•ArXiv
Analysis
This paper investigates the properties of the progenitors (Binary Neutron Star or Neutron Star-Black Hole mergers) of Gamma-Ray Bursts (GRBs) by modeling their afterglow and kilonova (KN) emissions. The study uses a Bayesian analysis within the Nuclear physics and Multi-Messenger Astrophysics (NMMA) framework, simultaneously modeling both afterglow and KN emission. The significance lies in its ability to infer KN ejecta parameters and progenitor properties, providing insights into the nature of these energetic events and potentially distinguishing between BNS and NSBH mergers. The simultaneous modeling approach is a key methodological advancement.
Key Takeaways
- •Simultaneous modeling of afterglow and kilonova emission provides a powerful tool for probing GRB progenitors.
- •The study infers progenitor properties (BNS vs. NSBH) for a sample of merger-driven GRBs.
- •The paper provides constraints on kilonova ejecta parameters, such as wind mass.
- •The findings support the results of numerical simulations regarding the relationship between chirp mass and tidal deformability.
Reference
“The study finds that a Binary Neutron Star (BNS) progenitor is favored for several GRBs, while for others, both BNS and Neutron Star-Black Hole (NSBH) scenarios are viable. The paper also provides insights into the KN emission parameters, such as the median wind mass.”