An analysis of the chemical abundances in halo star g18-39

Angrilli Muglia, Alessandro (2022) An analysis of the chemical abundances in halo star g18-39. Bachelor's Thesis, Astronomy.

Preview	Text A_Angrilli_Muglia_Thesis.pdf Download (3MB) | Preview
	Text Toestemming.pdf Restricted to Registered users only Download (118kB)

Abstract

The origin of high proper motion stars in the Milky Way is object of long standing interest in astronomy. In this thesis, we analyse a high resolution UVES spectrum of g18-39, a high proper motion star associated with the halo. This star is of interest because it is a solaranalog star, but presents very different characteristics than our Sun from a kinematic point of view. The analysis was carried out using iSpec, a spectral analysis tool, to search for and where possible measure the abundance of r-process chemical elements, specifically Europium, Thorium and Uranium. We measured the abundances of these elements using equivalent width analysis where possible, otherwise comparing our spectrum with synthesised spectra. We found a higher than solar metallicity for Europium, while a sub-solar metallicity for Thorium and Uranium. Finally, we explained our results associating the origin of g18-39 to the Gaia-Enceladus merger event.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Tolstoy, E.
Degree programme:	Astronomy
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	19 Jul 2022 08:46
Last Modified:	19 Jul 2022 08:46
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/27994

Actions (login required)

View Item