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 20 of 20 for “"gravitational wave astronomy"”.
-
DETECTION AND INFERENCE IN GRAVITATIONAL WAVE ASTRONOMY
… the detection and astrophysical modeling of gravitational waves de- tected by the Advanced Laser Interferometer Gravitational wave Observatory (LIGO) and Virgo. We discuss the techniques used in the PyCBC search pipeline to discover the first gravitational wave detection GW150914, and …
-
Detector Improvements and Optimization to Advance Gravitational-wave Astronomy
… of topics relevant to the current and future gravitational-wave facilities. After the last science observing run, O3, that ended in March 2020, the aLIGO and VIRGO gravitational-wave detectors are undergoing upgrades to improve their sensitivity. My thesis focuses on the work done at the LIGO …
-
Source modelling at the dawn of gravitational-wave astronomy
The age of gravitational-wave astronomy has begun. Gravitational waves are propagating spacetime perturbations ($\textit{“ripples in the fabric of space-time”}$) predicted by Einstein’s theory of General Relativity. These signals propagate at the speed of light and are generated by powerful …
-
Topics in gravitational-wave astronomy: Theoretical studies, source modelling and statistical methods
Astronomy with gravitational-wave observations is now a reality. Much of the theoretical research in this field falls under three broad themes: the mathematical description and physical understanding of gravitational radiation and its effects; the construction of accurate and computationally …
-
The Science of Gravitational-Wave Sources and Beyond Compact Binary Coalescences
<p>"This work focuses on the field of gravitational-wave astronomy by extending the scope of detectable sources beyond compact binary coalescences, All the gravitational-wave detections so far come from compact binary coalescences. Focusing on core-collapse supernovae as promising sources for short …
-
A torsion pendulum ground test of the LISA Pathfinder Free-fall mode
The LISA Pathfinder geodesic explorer mission for gravitational wave astronomy aims to measure a residual differential acceleration noise approaching the femto-m/s^2/Hz^1/2 levels needed for eLISA. This measurement is complicated by a large, roughly nm/s^2, stable differential gravitational …
-
Transients in the errorbox of GW190814
We are now firmly in the era of multi-messenger astronomy. The detection of the first binary black hole (BBH) merger in GW150914 [1] opened up the era of gravitational wave astronomy, with a further 9 such mergers being detected during the first two observing runs (O1 and O2) of the LIGO Scientific …
-
High-power operation of interferometric gravitational-wave detectors
… which saw the first direct detection of gravitational waves, we are firmly in the era of gravitational-wave astronomy. To reach the highest sensitivities, current interferometric gravitational-wave detectors are designed for hundreds of kilowatts of circulating optical power. At these …
-
Adaptive Mode Matching in Advanced LIGO and Beyond
<p>The era of gravitational wave astronomy was ushered in by the LIGO (Laser Interferometer Gravitational-Wave Observatory) collaboration with the detection of a binary black hole collision [2]. The event that shook the foundation of space-time allowed mankind to view the cosmos in a way that had …
-
Gravitational waves: understanding black holes
This thesis concerns the use of observations of gravitational waves as tools for astronomy and fundamental physics. Gravitational waves are small ripples in spacetime produced by rapidly accelerating masses; their existence has been predicted for almost 100 years, but the first direct evidence of …
-
Making better binary models and modeling distorted black holes using black hole perturbation theory
… theory both from an observational standpoint via gravitational waves and also tidal distortions of black hole horizons. The promise of gravitational wave astronomy depends on our ability to accurately model gravitational wave signals from astrophysical sources. This requires large numbers of …
-
Gravitational waves as direct probes of binary evolution and astrophysical environments
The field of gravitational-wave astronomy began with the detection of a merging 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 …
-
Exploring fundamental physics with gravitational waves
… I explore several topics in the field of gravitational wave astronomy. By means of introduction, I review the historical evolution of humanity's understanding of the mechanics of gravity, and the events which eventually led to the first ever detection of gravitational waves in 2015. The …
-
Advances in Simulating Binary Black Holes
… been able to directly observe the long-predicted gravitational waves. To date, there have been about 90 detection events of gravitational waves sourced by the most energetic phenomena in the Universe, the mergers of two black holes. The success of gravitational-wave astronomy is inseparable from …
-
Squeezed light sources for current and future interferometric gravitational-wave detectors
The era of gravitational-wave astronomy has begun, with the detection of 5 confirmed binary black holes and a binary neutron star coalescence by the Advanced Laser Interferometer Gravitational- wave Observatory (aLIGO), and later with the advanced Virgo detector. These detections have already …
-
Squeezed light sources for current and future interferometric gravitational-wave detectors
The era of gravitational-wave astronomy has begun, with the detection of 5 confirmed binary black holes and a binary neutron star coalescence by the Advanced Laser Interferometer Gravitational- wave Observatory (aLIGO), and later with the advanced Virgo detector. These detections have already …
-
Computation Methods for Parametric Analysis of Gravitational Wave Data
Gravitational waves are detected, analyzed and matched filtered based on an approximation of General Relativity called the Post Newtonian theory. This approximation method is based on the assumption that there is a weak gravity field both inside and around the body. However, scientists cannot …
-
The Disruption of Binary Star Systems by Massive Black Holes and the Restricted 3-Body Problem
… the implications of binary interactions for gravitational wave astronomy. Binaries that survive these orbits will have their own internal orbits shifted, gaining significant eccentricity and potentially having their semi-major axis changed. As surviving binaries have their orbits deformed, …
-
Die Methode der nichtlokalen effektiven Wirkung in höherdimensionalen Raumzeitmodellen
… effectively describes the dynamics of the <br>gravitational field both on branes and in the bulk in terms of brane <br>geometries directly accessible for observations. The nonlocal form factors of <br>the action incorporate a cumulative effect of the bulk Kaluza-Klein <br>modes. Also the …
-
Exploring gravity
… strong-field regime remains largely unexplored. Gravitational waves (GWs) are an excellent means of accessing strong-field regions. We investigate what we can learn about both astrophysics and gravitation from strong-field tests and, in particular, GWs; we focus upon extreme-mass-ratio (EMR) …