Date on Senior Honors Thesis

5-2019

Document Type

Senior Honors Thesis

Department

Physics and Astronomy

Degree Program

College of Arts and Sciences

Abstract

In this thesis, I will present my research work with statistical analysis towards a galaxy’s morphology and its morphometric. The first part would be with the galaxy morphometric and have heavy focus with one particular software: Source Extractor. Source Extractor was compared to GALFIT in order to see how accurate and precise we would expect the software to be with effective radii, scale length, inclination,position angle, and major and minor axes. This is towards preparation for future surveys with expectation of a large boom in galaxy discovery with the new observatories to be online (EUCLID, LSST, JWST, etc.). From our understanding, Source Extractor is neither accurate nor precise enough to consider its initial computed parameters to be true. However, it does hold to see if there any sort of correlation or trend within the population. On the second part, we do scale-invariant morphological calculations on some galaxies that are high-redshift and ultra-luminous. We do computed statistical analytics to find and be certain of the morphological parameters. We only use Gini value and asymmetry. However, we do see more possible correlation with Gini and asymmetry in such epoch, yet very uncertain. However, just with these characteristics, this sample has an unusual pattern from what was expected, and this has an implication that morphological parameters may be useful for further surveys, in that they can help identify the z~8 redshift galaxies with this unique characteristic; however, we may need a larger sample size to be more certain, which is difficult to do as it is difficult to detect and discern a high-redshift galaxy.

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