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The formulation of population III stars in the presence of a radiation field

Kamphuis, P. (2003) The formulation of population III stars in the presence of a radiation field. Master's Thesis / Essay, Astronomy.

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Abstract

Feedback is one of the most important problems in reionization. This paper explores the feedback of UV radiation on the H2 in a proto-stellar gas cloud. The fate of H2 in UV radiation fields is one of the biggest feedback problems because H2 is the only coolant in the primordial gas below 10,000 K. Because of this H2 determines the collapse of gas clouds during the reionization epoch. A simulation is done where a proto-stellar cloud without metals is subjected to a population III radiation field, and its density of H2 is examined after irradiation. It is found that the very first stars provide a negative feedback to stars forming later. And thus stretch the epoch of reionization. It is found that, without considering fragmentation, the population III stars form as isolated objects in regions with a radius pf 10 +- 2 pc.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Astronomy
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:28
Last Modified: 15 Feb 2018 07:28
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/8306

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