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Identifier 000459293
Title Investigating stellar explosions using stellar evolution models
Alternative Title Μελέτη αστρικών εκρήξεων με χρήση μοντέλων αστρικής εξέλιξης
Author Μαστοράκης, Μιχαήλ Π.
Thesis advisor Παυλίδου, Βασιλική
Αντωνιάδης, Γιάννης
Abstract Most massive stars belong in binary or multiple systems, which results in interactions via mass transfer. This kind of nteractions may lead to the (partial) removal of the hydrogen-rich outer layers, creating a stripped-envelope star, which in turn alters the core structures of the star. This affects greatly the evolution and the final remnant of the evolution. In order to study this, we used published single helium stars for 3 values of metallicity as an approximation since they exhibit similar structures with stripped envelope stars, and we employed the semi-analytic model of Müller et. al. (2016), which depends on 7 parameters. We did a parameter study by allowing these parameter to take some values in their theoretical intervals and in each step we performed a population synthesis in order to probe the remnant mass distributions. In this way we were able to gain information about the supernova explosion mechanism and dependence of the remnant distributions structures on the values of the parameters, and gauge the effect of metallicity in the evolution. More specifically, we found that ~30% of our total cases lead to unphysical distributions and ~59% of the remaining physical ones have distributions that are multimodal in nature (at least bimodal). Finally, we plotted the remnant mass as a function of the final mass of the star before core collapse, in order to elucidate the relation between these two masses.
Language English
Subject Αστρικές εκρήξεις
Μοντέλα αστρικής εξέλιξης
Issue date 2023-11-22
Collection   School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses
  Type of Work--Post-graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/7/c/4/metadata-dlib-1696928269-815369-12907.tkl Bookmark and Share
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