A comprehensive dark matter analysis on the spiral galaxy NGC 4321 (M100) / Tan Wei Shen
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 rot...
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| Format: | Thesis |
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2021
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| Online Access: | http://studentsrepo.um.edu.my/15028/2/Tan_Wei_Shen.pdf http://studentsrepo.um.edu.my/15028/1/Tan_Wei_Shen.pdf http://studentsrepo.um.edu.my/15028/ |
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| Summary: | 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 < |
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