Graduate theses
Current Record: 26 of 179
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Title |
Search for gravitational lens system candidates at milli-arcsecond scales using EVN data at 5 and 22 GHz |
Author
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Καλαϊτζιδάκης, Γεώργιος
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Thesis advisor
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Casadio, Carolina
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Abstract |
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.
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Language |
English |
Issue date |
2023-07-28 |
Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Graduate theses
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Type of Work--Graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/5/c/9/metadata-dlib-1687503481-205322-7264.tkl
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Views |
218 |