Πτυχιακές εργασίες

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Τίτλος	Measuring galaxy distances using cross-correlation methods
Άλλος τίτλος	Μέτρηση αποστάσεων γαλαξιών με την χρήση μεθόδων αλληλοσυσχέτισης
Συγγραφέας	Μαρκουδάκης, Ιωάννης
Σύμβουλος διατριβής	Ζέζας, Ανδρέας Casadio, Carolina
Περίληψη	We are interested in developing a tool that can accurately measure the redshift of distant galaxies, while also quantifying of the measurement’s confidence. To accomplish that, we utilized the RVSAO package, which is a set of tools operating in the IRAF environment. xcsao, which is the basic task of RVSAO, implements the cross-correlation method to estimate the redshift of an object, using a template spectrum as reference. We have enriched the template list provided by RVSAO, by adding Sloan Digital Sky Survey III (SDSS-III) spectra as well as composite ones, covering a wide range of galaxy types with redshifts reaching up to z = 1.814. These spectra were pre-processed appropriately, in order to match the RVSAO template format. We have modeled a relation between the confidence of a distance measurement and the signal-to-noise (SNR) of the spectra, and also executed several simulations to thoroughly assess the method’s capabilities. We confirm the efficiency and stability of the method for a plethora of galaxy types, such as different types of Active Galactic Nuclei (AGN) and quasars.
Γλώσσα	Αγγλικά
Ημερομηνία έκδοσης	2023-11-22
Συλλογή	Σχολή/Τμήμα--Σχολή Θετικών και Τεχνολογικών Επιστημών--Τμήμα Φυσικής--Πτυχιακές εργασίες
	Τύπος Εργασίας--Πτυχιακές εργασίες
Μόνιμη Σύνδεση	https://elocus.lib.uoc.gr//dlib/5/a/c/metadata-dlib-1697523310-269507-13013.tkl
Εμφανίσεις	306

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