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Αρχική    Search for gravitational lens system candidates at milli-arcsecond scales using EVN data at 5 and 22 GHz  

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Τίτλος Search for gravitational lens system candidates at milli-arcsecond scales using EVN data at 5 and 22 GHz
Συγγραφέας Καλαϊτζιδάκης, Γεώργιος
Σύμβουλος διατριβής Casadio, Carolina
Περίληψη The principal aim of the work presented in this thesis is the verification of strong gravitational lens candidates within a catalogue of compact radio sources. This study is part of the Search for MIlli-LEnses (SMILE) project, focused on the search for gravitational lens systems on milliarcsecond scales, using Very Long Baseline Interferometry (VLBI) data at radio frequencies. In the work presented here, we initially selected milli-lens candidates from the publicly available Astrogeo database, and we observed them with the European VLBI Network (EVN) at 5 and 22 GHz. We obtained the radio images of these sources and analyzed a number of physical quantities that we expect to help us judge whether a source is a gravitational lens system or not. Out of the 16 sources that were studied in this work, 3 passed all tests and are still considered as valid candidates. Additional follow-up studies are needed to prove whether they are indeed gravitational lens systems.
Γλώσσα Αγγλικά
Ημερομηνία έκδοσης 2023-07-28
Συλλογή   Σχολή/Τμήμα--Σχολή Θετικών και Τεχνολογικών Επιστημών--Τμήμα Φυσικής--Πτυχιακές εργασίες
  Τύπος Εργασίας--Πτυχιακές εργασίες
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