Sabri, M. R. Mat and Abidin, Zamri Zainal and Hwang, C. Y. and Kiew, C. Y. and Asmi, N. and Subramaniam, S. and Lee, D. A. A. (2023) The investigation of dark matter density profiles on the neutralino mass and cross-section annihilation (m(chi)- <sigma v > constraint lines of selected galaxy clusters by considering their synchrotron emission. New Astronomy, 102. ISSN 1384-1076, DOI https://doi.org/10.1016/j.newast.2023.102023.
Full text not available from this repository.Abstract
We investigated the indirect detection of neutralino dark matter using radio observation. By looking at the energy spectrum of relativistic positronelectron, this method may provide us with the upper limit of neutralino dark matter emission. Neutralino dark matter can emit synchrotron emissions due to the interaction of relativistic positronelectron spectrum energy with the intracluster magnetic field. The synchrotron emission of dark matter highly depends on the dark matter density at the centre of the cluster. By using the cold dark matter model, the density of dark matter can be obtained using NavarroFrenkWhite (NFW), Einasto, Diemer and Kravtsov 2014 (DK14) and Hernquist profiles. Using the observed radio halo emission as the maximum emission (from dark matter and other sources), we constrained the neutralino mass (m(chi)) and neutralino cross-section annihilation <sigma v > () as () constraint lines. We investigated the effect of different profiles on the m(chi)- <sigma v > constraint lines. We also used all the basic annihilation channels for better and stronger constraint lines. Our findings demonstrated the NFW profiles provided us with a good constraint line similarly with previous study. Our results also confirmed that the + and channels provide us with a stronger constraint at = 100 GeV and 1000 GeV, respectively. Overall, our findings are consistent for the constraint lines of all the chosen galaxy clusters namely A119, A2199, A2142, A2744, A478 and A2029.
| Item Type: | Article |
|---|---|
| Funders: | University Malaya's Faculty of Science Grant, GPF081-2020 |
| Uncontrolled Keywords: | Elementary particles - Dark matter - galaxies; Clusters; General - galaxies; Magnetic fields |
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 07 May 2024 06:35 |
| Last Modified: | 07 May 2024 06:35 |
| URI: | http://eprints.um.edu.my/id/eprint/38434 |
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