Putman, Lorraine (2021) Halo mass estimates of Fornax Galaxies from Globular Cluster populations. Master's Thesis / Essay, Astronomy.
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Abstract
In this work, we present the number of GCs for 540 dwarf galaxies in the Fornax Cluster. After applying aperture photometry, a selection of the data was matched to already observed GCs from the HST/ACS survey of the Fornax Cluster to determine how GC candidates should be selected. This was possible for 19 galaxies. Criteria were determined based on the values of the matched GCs and used for the GC selection of the resulting galaxies. These selection criteria include g-band magnitude, colors (g-r, r-i) and a compactness parameter representing the difference in magnitude between aperture sizes of 4 and 8 pixels. For the analysis, we subdivided the sample in various ways to investigate the number and specific frequency of GCs as a function of location, early- and late-type galaxies, nucleated and non-nucleated galaxies and surface brightness. We find a higher number of GCs for early-type, nucleated and lower surface brightness galaxies. The number of GCs is higher in the center of the Fornax Cluster than in the region around Fornax A, consistent with the fact that the GC number in the center of the dense Virgo cluster is higher than in all other regions. Finally, we have also derived the dark matter halo mass for the dwarf galaxies using the scaling relation between the number of GCs and the dark halo mass of a galaxy.
| Item Type: | Thesis (Master's Thesis / Essay) |
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| Supervisor name: | Peletier, R.F. and Saifollahi, T. |
| Degree programme: | Astronomy |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 26 Jul 2021 15:32 |
| Last Modified: | 26 Jul 2021 15:32 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/25462 |
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