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Identifier 000456447
Title Demographics of X-ray binaries populations in nearby galaxies and connection with the stellar populations and intrinsic properties of their host galaxy
Alternative Title Δημογραφική μελέτη πληθυσμών διπλών αστέρων ακτίνων-Χ σε κοντινούς γαλαξίες και συσχέτιση με τους αστρικούς πληθυσμούς και τις ιδιότητες των γαλαξιών που ανήκουν
Author Πολιτάκης, Χαράλαμπος
Thesis advisor Ζέζας, Ανδρέας
Reviewer Κυλάφης, Νικόλαος
Παπαδάκης, Ιωσήφ
Χαρμανδάρης, Βασίλης
Παυλίδου, Βασιλική
Reig, Pablo
Antoniadis, Ioannis
Abstract In this thesis, we study the population of discrete X-ray sources in nearby galaxies and in particular, close binary systems emitting in X-rays (X-ray Binaries - XRBs). It consists of two parts, the first of which studies the distribution of XRBs with a massive stellar companion (HMXBs) in the closest to the Milky Way edge-on galaxy NGC 55, in correlation with the regions of star formation within the galaxy. The result is the estimation of the center of mass transverse velocity of HMXBs as they are displaced from their birth place. Such estimation is the first for a galaxy located outside the Local Group. The second part studies the population of XRBs in a large sample of nearby galaxies, included in the catalogue of observations from the Chandra space observatory. The sample is comprised of 10.099 X-ray sources in 319 nearby galaxies of all morphological types and intrinsic properties such as metallicity, star formation rate and stellar mass. We construct the X-ray Luminosity function (XLF) of XRBs, and using power-law models we estimate the emerging scaling relations with the intrinsic properties of the host galaxies. This is the most complete study of populations of XRBs in the literature, containing the largest sample of X-ray sources and galaxies. The results presented in the thesis, also affect the binary population synthesis models in constraining the parameter space of the physical processes involved in the evolution of XRBs.
Language English
Subject Neutron stars
Ακτίνες-Χ
Αστέρες νετρονίων
Issue date 2023-07-10
Collection   School/Department--School of Sciences and Engineering--Department of Physics--Doctoral theses
  Type of Work--Doctoral theses
Permanent Link https://elocus.lib.uoc.gr//dlib/9/c/a/metadata-dlib-1687257876-264667-13891.tkl Bookmark and Share
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