|
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
|
Views |
911 |