| Name: | Tanima Mondal |
| Affiliation: | Dept. of Physics, Indian Institute of Technology, IIT Kharagpur, |
| Conference ID : | ASI2024_806 |
| Title : | Afterglow Modeling of Gamma Ray Bursts (GRBs) at Very High Energy (VHE) regime |
| Authors : | 1. Tanima Mondal
2. Lekshmi Resmi
3. Debanjan Bose |
| Authors Affiliation: | 1. Dept. of Physics, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302 India
2. Dept. of Earth & Space Sciences, Indian Institute of Space Science & Technology, Trivandrum 695547, India
3. School of Astrophysics, Presidency University, Kolkata 700073, India
|
| Mode of Presentation: | Poster |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | In recent years, MAGIC and HESS have detected VHE (>100 MeV) gamma-rays from GRBs, which offers the possibility to investigate theoretical models such as the emission mechanism of synchrotron self-Compton (SSC) in GRBs during the late times in the afterglow phase. We have developed a leptonic model of GRB and explored the afterglow parameter space to see the detectability of sub-TeV photons by Cherenkov Telescope Array (CTA). We further investigate the synchrotron self-Compton (SSC) emission model to fit VHE data from two GRBs, namely GRB 190114C and GRB 190829A, detected by MAGIC and HESS telescopes respectively. Constraining afterglow model parameters using MCMC fit, we find that the SSC emission in the Thomson regime fits the spectra of these two Long GRBs (LGRBs) adequately. Since LGRBs are one of the active research domains to understand these astrophysical transients governing the entire high-energy universe, and high-energy neutrinos can be the potential candidates to reveal the underlying physics associated with LGRBs. We are in the process of developing a hadronic model of GRB based on p-γ, p-p, and p-n interaction in the lepton-baryonic jetted outflow during the emission period to explain the detection probability of high energy neutrinos during the afterglow phase. Based on our theoretical predictions from the hadronic model, we will explore whether a neutrino signal is expected to be detected from the aforementioned two VHE LGRBs. |
