A Deeper Look at the Anomalous Globular Cluster Luminosity Function of NGC-1052 DF2

Lania, Jorick (2022) A Deeper Look at the Anomalous Globular Cluster Luminosity Function of NGC-1052 DF2. Bachelor's Thesis, Astronomy.

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Abstract

We present a photometric analysis of the globular clusters of NGC-1052 DF2 (DF2). DF2 is an ultra diffuse galaxy which appears to have a negligible dark matter content and overly bright globular clusters. The Globular Cluster Luminosity Function (GCLF) seems to peak at M = −9 instead of the nigh-universal value of MV = −7.5. A previous study observed a secondary peak around the canonical value. In this work, we used SExtractor software to extract sources upon which we perform a photometric selection and statistical background subtraction using extremely deep HST data, thereby obtaining the GCLF of DF2’s globular clusters. We observe no evidence of bimodality in the GCLF, and a reduced chi squared test shows that the data favours a single mode Gaussian over a bimodal model, although neither model provides a good fit.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Peletier, R.F. and Saifollahi, T.
Degree programme:	Astronomy
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	19 Jul 2022 09:47
Last Modified:	19 Jul 2022 09:47
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/28007

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