| Name: | Nasmi S Anand |
| Affiliation: | Indian Institute of Technology Indore ,India |
| Conference ID: | ASI2025_717 |
| Title: | Exploring the Diffuse Emission in Low-Mass Galaxy Cluster : A Multifrequency Approach |
| Authors: | Nasmi S Anand1 , Abhirup Datta1, Swarna Chatterjee1, Ramij Raja2 and Majidul Rahaman3 |
| Authors Affiliation: | 1Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India 2Centre for Radio Astronomy Techniques and Technologies, Department of Physics and Electronics,
Rhodes University, Makhanda 6140, South Africa 3 Institute of Astronomy, National Tsing Hua University, Hsinchu 300044, Taiwan, R.O.C |
| Mode of Presentation: | Poster |
| Abstract Category: | Galaxies and Cosmology |
| Abstract: | The hierarchical structure formation model proposes that cosmic structures evolve through the accretion of matter and mergers, ultimately forming galaxy clusters. To comprehend the evolution of the universe, it's vital to study the formation and evolution of these clusters. When a galaxy cluster with a mass of 10^{14}solar masses undergoes major or minor merging, it dissipates potential energy through various mechanisms, including heating the intracluster medium (ICM), generating shock waves, inducing turbulence, and gas sloshing. These shock waves and turbulence can accelerate or re-accelerate electrons and protons, which then emit radio waves via synchrotron radiation when interacting with magnetic fields, exhibiting steep spectra (α<−1). Such emissions can be observed in the MHz to sub-GHz range and manifest as radio halos and relics in disturbed clusters, as mini-halos in relaxed clusters, and as radio phoenixes which can be present in both relaxed and disturbed clusters . Studying these emissions aids in understanding the evolution of magnetic fields and the particle acceleration mechanisms during mergers. The main theories for the acceleration of cosmic particles responsible for synchrotron radiation are turbulent and shock acceleration mechanisms or the hadronic origin of secondary particles. Increasing the number of observed diffuse emissions will enhance the statistical robustness of these theories. In the past, research has primarily focused on high-mass clusters (M>5*10^{14}solar mass) due to the limitations of earlier instruments. However, the uGMRT, with its extensive coverage area, offers exceptional sensitivity and resolution. Here, we have used archival data from the uGMRT band-3 observations of galaxy clusters along with their complimentary observations at MeerKAT L-band, ASKAP-low and TGSS archival images. We will present an update on one particularly interesting source of Abell 13 galaxy cluster with results both in radio and x-ray wavelengths. |
