Post-graduate theses
Current Record: 17 of 299
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Identifier |
000459674 |
Title |
Pulsars with Gaia counterparts |
Alternative Title |
Πάλσαρς με αντιστοιχήσεις στον κατάλογο Gaia |
Author
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Βολακάκης, Ιωάννης Β.
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Thesis advisor
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Αντωνιάδης, Ιωάννης
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Reviewer
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Παυλίδου, Βασιλική
Χαρμανδάρης, Βασίλης
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Abstract |
Only a few per cent of the known pulsars in the Galactic disk are members of binary systems. Natal kicks during the supernova explosions tend to break the possible binarity of the progenitor stars and create a majority of isolated pulsars in the galaxy. In this work we perform a systematic research to Gaia Data Release 3 sources in order to identify potential companions of a number of pulsars that are listed in the ATNF pulsar catalogue. Because we are interest in close astrometric pairs, we keep in our final sample only the pulsars with positions known to better than 0.ʺ5. We searched for possible Gaia associations within a radius of 20ʺ of each pulsars timing position. Our research identifies possible companions to 29 known binaries and 18 candidate binary systems as well as the Crab pulsar and PSR B0540-69 which are known single pulsars. We have kept the cases with a probability of chance coincidence less than 10%. We examine the kinematic and photometric properties of the new sources – entries that had not appeared in the previous relative work by Antoniadis, (2020) & Antoniadis, (2021) and based on the existing literature we try to identify whether the unveiled match is a true association or a chance of coincidence and therefore unrelated. We conclude that 2 out of 7 new matches for known binaries are likely unrelated while for the other 5, their derived properties are in highly agreement with the current literature suggesting a robust association. For the candidate cases further timing observations are needed in order to make a safe and certain conclusion.
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Language |
English |
Subject |
ATNF pulsar catalogue |
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Associations |
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Binary evolution |
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Binary systems |
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Companion stars |
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Cross -matches |
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Gaia catalogue |
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Millisecond pulsars |
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Neutron stars |
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Αστέρες νετρονίων |
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Διασταύρωση καταλόγων |
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Δυαδικά συστήματα |
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Δυαδική εξέλιξη |
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Κατάλογος ATNF |
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Μίλλι-σεκόντ πάλσαρς |
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Ομόλογοι |
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Συνοδοί αστέρες |
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Συσχετήσεις |
Issue date |
2023-11-22 |
Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Post-graduate theses
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Type of Work--Post-graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/8/4/f/metadata-dlib-1697722154-27793-15293.tkl
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Views |
985 |
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