Bonhof, Rick (2023) The Estimation of Kinematic Parameters Through Photometric Analysis. Bachelor's Thesis, Astronomy.
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Abstract
This thesis aims to create a method as to estimate kinematic properties of galaxies, like the fraction of stars within a galaxy that is rotating in bulk rotation, through using photometric parameters, forfeiting spectroscopic analysis. To achieve this 1160 simulated galaxies from the IllustrisTNG TNG50 volume were used, which were displayed on a cutout with a resolution of 1600 by 1600 pixels. From these the data catalogues from TNG50, visual classification through manual inspection and morphological parameters estimation were used to compare these parameters to each other. Within these parameters it was found that visual classification has a higher prevalence of red spiral galaxies than through kinematic classification. Furthermore the Gini coefficient and M20 statistic did not seem to distinguish between visually classified galaxies. From these parameters a linear regression model was created as to determine the disk fraction fd through photometric input parameters, resulting with a score of determination of 0.4444, mean squared error of 0.02250 and mean absolute deviation of 0.1242.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Wang, L. and La Marca, A. |
| Degree programme: | Astronomy |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 12 Jul 2023 09:59 |
| Last Modified: | 12 Jul 2023 09:59 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/30511 |
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