| Name: | Sandeep Kumar Mondal |
| Affiliation: | Raman Research Institute |
| Conference ID : | ASI2024_861 |
| Title : | Study of Emission Mechanism of a HBL Source, Mrk 180, using Long-Term Multi-Wavelength Data |
| Authors : | Sandeep Kumar Mondal, Saikat Das, Nayantara Gupta |
| Authors Affiliation: | Sandeep Kumar Mondal, Nayantara Gupta (Astronomy & Astrophysics Group, Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore- 560080, Karnataka, India)
Saikat Das (Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan) |
| Mode of Presentation: | Poster |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | Markarian (Mrk) 180 is a HBL object, located at a redshift of 0.045 and a potential candidate for high-energy cosmic ray acceleration. In this work, we have done a temporal and spectral study using Fermi Large Area Telescope (Fermi-LAT) gamma-ray data, collected over 12.8 years. In the case of the temporal study, the long-term Fermi-LAT gamma-ray light curve does not show any significant flux enhancement. To understand the underlying physical mechanism, we focused our study on multi-wavelength spectral analysis. We constructed multi-wavelength spectral energy distribution (MWSED) using Swift X-ray, ultraviolet \& optical, and X-ray Multi-Mirror Mission (XMM-Newton) data, which have been analysed thoroughly. The SED has been modelled with three different models: (i) pure leptonic scenario and lepto-hadronic scenario where we considered two types of lepto-hadronic interactions (ii) line-of-sight interactions of ultrahigh-energy cosmic rays (UHECR; $E\gtrsim 10^{17}$ eV) with the cosmic background radiation and (iii) interaction between relativistic protons with the cold proton within the blazar jet. In this literature, we have done a detailed comparative study between all these three models. In an earlier study, Mrk 180 was associated with the Telescope Array (TA) hotspot of UHECRs at $E>57$ EeV which motivates us to check whether Mrk 180 can be a source of UHECRs, contributing to the TA hotspot. |
