# Energetic Particles of Cosmic Accelerators II: Active Galactic Nuclei and Gamma-ray Bursts

## TL;DR

This paper discusses the role of energetic particles in active galactic nuclei and gamma-ray bursts, emphasizing the importance of MeV gamma-ray astronomy in understanding their particle acceleration and radiation mechanisms.

## Contribution

It highlights the significance of MeV gamma-ray observations for advancing knowledge of particle acceleration in AGNs and GRBs, filling gaps left by previous studies.

## Key findings

- MeV gamma-ray astronomy can reveal particle acceleration processes in AGNs and GRBs.
- Understanding jets in AGNs and GRBs is crucial for cosmic environment studies.
- The paper underscores the need for future MeV gamma-ray missions.

## Abstract

The high-energy universe has revealed that energetic particles are ubiquitous in the cosmos and play a vital role in the cultivation of cosmic environments on all scales. Though they play a key role in cultivating the cosmological environment and/or enabling our studies of it, there is still much we do not know about AGNs and GRBs, particularly the avenue in which and through which they supply radiation and energetic particles, namely their jets. This White Paper is the second of a two-part series highlighting the most well-known high-energy cosmic accelerators and contributions that MeV gamma-ray astronomy will bring to understanding their energetic particle phenomena. The focus of this white paper is active galactic nuclei and gamma-ray bursts.