Βαρυτικά Κύματα και η Ανίχνευσή τους

Ιωάννου, Μαρίνα

dc.contributor.author	Ιωάννου, Μαρίνα
dc.date.accessioned	2024-11-04T08:46:17Z
dc.date.available	2024-11-04T08:46:17Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/60357
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.28053
dc.rights	Default License
dc.subject	Βαρυτικά Κύματα	el
dc.subject	επίλυση δυναμικών εξισώσεων	el
dc.subject	ένταση ακτινοβολίας βαρυτικών κυμάτων	el
dc.subject	συγχώνευση μαύρων τρυπών	el
dc.subject	ανίχνευση βαρυτικών κυμάτων	el
dc.subject	Gravitational waves	en
dc.subject	solving the dynamical equations	el
dc.subject	intensity of the radiation of gravitational waves	el
dc.subject	black holes merger	el
dc.subject	gravitational waves detection	el
dc.title	Βαρυτικά Κύματα και η Ανίχνευσή τους	el
dc.title	Gravitational Waves and their Detection	en
dc.contributor.department	Φυσικής	el
heal.type	bachelorThesis
heal.classification	Φυσική, Γενική Θεωρία Σχετικότητας	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2024-04-02
heal.abstract	In the present thesis, we analyse the propagation of gravitational waves in general relativity solving the dynamical equations and proving the existence of gravitational waves (GW) that are propagating with velocity of light and have two polarizations. We demonstrate that the intensity of gravitational waves is proportional to the square of the third time derivative of the quadrupole momentum of the matter and is inversely proportional to the fifth power of the light velocity. For that reason the generation of the gravitational waves requires a release of large amount of energy which can be realised during the collision and merger of massive binary systems of black holes or neutron stars. We estimated the amount of GW energy radiated from these binary systems, as well as their time of merger. It is important to note that the formulas we used for all of our calculations can only be applied for binary systems with big radii enough, so that the masses of the system can be considered as massive points. We present examples of recent experimental measurements of the intensity of gravitational waves generated by the collapse of the binary systems and describe their time evolution which consists of three stages: inspiral, merger and ring-down. In addition to the optical, radio, gamma rays and infrared astrophysics, the gravitational waves opens a new window to the investigation of the deep structure of the Universe and can provide the information about very early stages of the evolution of the Universe and of the inflation and Big Bang. We review ongoing experiments devoted to the measurements of GW and design of the future experiments allowing even better resolution of the astrophysical events in the Universe.	en
heal.advisorName	Σαββίδης, Γεώργιος
heal.committeeMemberName	Κουτσούμπας, Γεώργιος
heal.committeeMemberName	Παπαντωνόπουλος, Ελευθέριος
heal.committeeMemberName	Κεχαγιάς, Αλέξανδρος
heal.academicPublisher	Σχολή Εφαρμοσμένων Μαθηματικών και Φυσικών Επιστημών	el
heal.academicPublisherID	ntua
heal.numberOfPages	59
heal.fullTextAvailability	false