Tan , Wei Shen (2021) A comprehensive dark matter analysis on the spiral galaxy NGC 4321 (M100) / Tan Wei Shen. Masters thesis, Universiti Malaya.
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Abstract
The dark matter analysis on the spiral galaxy NGC 4321 (M100) is studied by considering the nine different dark matter profiles so far lacking in the scientific literature, i.e. Pseudoisothermal, Burkert, NFW, Moore, Einasto, core-modified, DC14, coreNFW and Lucky13 profiles. In this thesis, the rotation curve analysis was done on the galaxy NGC 4321 by using nonlinear fitting of star, gaseous and dark matter halo equations with selected VLA HI observation data. Among the nine dark matter profiles, four dark matter profiles (DC14, Lucky13, Burkert and Moore profiles) showed declining features and hence found to be not suitable for this galaxy. This is concluded to be mainly due to the characteristics of those dark matter profiles and also due to the varying levels of problems within the internal region fittings. For the remaining five accepted dark matter profiles, the analysis was conducted by using the reduced chi-square test. Four out of the five accepted dark matter profiles lie within the range of 0.40 <
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | Dissertation (M.A.) – Faculty of Science, Universiti Malaya, 2021. |
| Uncontrolled Keywords: | Cosmology; Rotation curve; Dark matter; Neutral hydrogen; Carbon monoxide; Radio astronomy; Spiral galaxy |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science |
| Depositing User: | Mr Mohd Safri Tahir |
| Date Deposited: | 09 Jan 2025 05:46 |
| Last Modified: | 09 Jan 2025 05:46 |
| URI: | http://studentsrepo.um.edu.my/id/eprint/15028 |
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