| Name: Akhilesh Ray |
| Affiliation: ARIES, Nainital |
| Conference ID: ASI2026_971 |
| Title: Pion production in the Accretion Disk of rotating blackhole |
| Abstract Type: Poster |
| Abstract Category: High Energy Phenomena, Fundamental Physics and Astronomy |
| Author(s) and Co-Author(s) with Affiliation: Akhilesh Ray(ARIES, Nainital - 263001, India), Dr. Indranil Chattopadhyay(ARIES, Nainital - 263001, India) |
| Abstract: As we investigate the dynamics of accretion disks around black holes, it becomes evident that several radiative processes operate as matter falls into the gravitational potential well. During accretion, gravitational energy is progressively converted into thermal energy, leading to a substantial increase in plasma temperature, particularly in the vicinity of the event horizon. This
elevated temperature enables a variety of high-energy radiative processes to occur. In the present study, we focus on high-energy interactions in the accretion flow, treating the disk as a hot plasma. In such a highly energetic environment, proton–proton interactions become significant and can result in the production of neutral pion (π0) mesons. These mesons are extremely short-
lived and rapidly decay into two gamma-ray photons, thereby contributing to the observable gamma-ray spectrum.
Since our work explores accretion onto rotating black holes, the Kerr parameter (spin) plays a crucial role in determining the pair production rate. The efficiency of pion production is strongly dependent on the plasma temperature. As our model extends earlier adiabatic sub-Keplerian accretion models to include black hole rotation, the temperature near the event horizon
is expected to increase significantly with increasing Kerr parameter. Consequently, the rate of neutral pion production is enhanced, leading to a stronger gamma-ray emission signature. This study aims to quantify the dependence of the gamma-ray output
on black hole spin and to provide theoretical predictions that can be tested against high-energy astrophysical observations. |
