Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Compact Binaries"”.
-
Multimessenger signatures of compact binaries
… this thesis, I present studies of multimessenger compact binaries from two angles: electromagnetic follow-up of gravitational-waves, and gravitational-wave follow-up of electromagnetic sources. I first describe technical and computational efforts to enable the distribution of alerts of kHz …
-
Spectroscopic and photometric observations and analysis of compact binaries
… of three recently discovered transient compact binary systems which comprise all three types of accretors, namely a white dwarf, neutron star and black hole. One system is a Cataclysmic Variable (CV), with an accreting white dwarf, namely 2SXPS J062339.9−265751, while two are Low-Mass …
-
Observable signatures of general relativistic dynamics in compact binaries
… GR effects in two different types of compact binary systems. The first is the coalescence of massive black holes in high-redshift galaxies. The gravitational waves (GWs) from these systems can be detected by the proposed low-frequency gravitational wave detector LISA and used to …
-
Gravitational Waves and Inspiraling Compact Binaries in Alternative Theories of Gravity
… explicit equations of motion for non-spinning compact objects: neutron stars or black holes) to 2.5 post-Newtonian order, or $O(v/c)^5$ beyond Newtonian gravity, in a general class of alternative theories to general relativity known as scalar-tensor theories. For the conservative part of the …
-
Numerical Modelling of the Dynamics and Gravitational Radiation of Compact Binaries in General Relativity
… big bang. Other examples are self gravitating compact objects such as black holes (BH) and the precise modelling neutron stars (NS). The gravitational waves from the inspirals and collisions of BHs and NSs can be measured by large interferometer experiments such as the Laser Interferometer …
-
Astrophysical signatures of neutron stars in compact binaries and experimental improvements on gravitational-wave detectors
Neutron stars (NSs) are astrophysical laboratories that allow us to probe physics at extreme conditions. The first half of this Thesis is devoted to exploring how we can connect theoretical models of NSs to observational signatures whose detections are made possible by state-of-the-art instruments. …
-
Using perturbation theory to understand the two body problem in general relativity
Binary systems composed of compact objects (neutron stars and black holes) radiate gravitational waves (GWs). The prospect of detecting these GWs using ground and space based experiments has made it imperative to understand the dynamics of such compact binaries. This work describes several advances …
-
Topics in the Detection of Gravitational Waves from Compact Binary Inspirals
<p>Orbiting compact binaries - such as binary black holes, binary neutron stars and neutron star-black hole binaries - are among the most promising sources of gravitational waves observable by ground-based interferometric detectors. Despite numerous sophisticated engineering techniques, the …
-
Gravitational waves as direct probes of binary evolution and astrophysical environments
… heavy stellar-mass black-hole binary. Many such compact binaries have been detected since then and more massive black-hole mergers are expected to be detected as the rest of the gravitational-wave spectrum is opened up in the coming years and decades. Gravity itself, however, is insufficient for …
-
Deep learning methods for enabling real-time gravitational wave and multimessenger astrophysics
… including eccentric and spin-precessing compact binaries, which are essential to infer the astrophysical parameters of an event, are not available. Searches for unmodeled and anomalous signals do not have sufficient sensitivity compared to the targeted searches. Furthermore, existing …
-
IMPROVING THE SENSITIVITY OF ADVANCED LIGO THROUGH DETECTOR CHARACTERIZATION
… work on searches for gravitational waves from compact binary coalescences (CBCs) in Ad- vanced LIGO’s second observing run (O2). This observing run started on November 30, 2016, and lasted until August 25, 2017, and resulted in the identification of 8 unambiguous gravitational-wave signals, …
-
Enhancing the detection and the reconstruction of gravitational-wave transients in the LIGO-Virgo-KAGRA data using weak assumptions on the astrophysical sources
… astrophysical signals interpreted as mergers of compact objects. These observations provide invaluable tests of the General Relativity and open a new era of astronomy, unveiling compact objects’ nature. The focus of the thesis is the detection and the characterization of GW transients with …