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 197 for “"gravitational-wave"”.
-
Topics in Gravitational-Wave Astrophysics
… we study the applicability of different waveform models in</p> <p>gravitational wave searches for comparable mass binary black holes. We determine</p> <p>the domain of applicability of the computationally inexpensive closed form models,</p> <p>and the same for the semi-analytic models …
-
Gravitational wave extraction in numerical relativity
… thus most interesting source for the study of gravitational waves, a prediction of general relativity, is the merger of two black holes. To understand the generation and evolution of gravitational waves in such a case, extensive efforts have been made. One is the construction of highly …
-
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 …
-
Interferometric experiments towards advanced gravitational wave detectors
… later extended this concept to include gravitational interactions, and Eddington's timely measurements of stellar positions during a solar eclipse in 1919 confirmed that gravity's effect on spacetime is both real and entirely physical -- not merely a mathematical curiosity. With the …
-
Squeezed states for advanced gravitational wave detectors
… measurements, those of interferometric gravitational-wave detectors among them. Introducing squeezed states into an interferometer's readout port can improve the sensitivity of the instrument, leading to richer astrophysical observations. In recent years, this technique has been used to …
-
Techniques for laser interferometer gravitational wave detectors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1992.
-
Coating Thermal Noise in Gravitational-Wave Detectors
The direct detection of gravitational waves, originating from cataclysmic events such as black hole and neutron star mergers, has ushered in a new era of observational astronomy. These signals offer unique insights into astrophysical phenomena and fundamental physics, but fully realizing their …
-
Applications of deep learning for gravitational wave physics
… neutron star merger predictions, real-time gravitational wave detections, and gravitational wave denoising. For eccentric compact binary coalescence events, the state-of-the-art early warning system developed in this work is capable of providing up to 2 minutes predictions for the imminent …
-
Alignment issues in laser interferometric gravitational-wave detectors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
-
Quantum Optics and Mechanics in Gravitational-Wave Detectors
Gravitational-wave detectors like Advanced LIGO probe perhaps the most cataclysmic events since the Big Bang, involving objects tens to hundreds of times more massive than the Sun, yet they remain at the whim of minute quantum fluctuations. Pushing our reach further into the cosmos demands a …
-
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 …
-
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 …
-
Gravitational Wave prediction from Galactic binary populations for LISA
… are expected to be the primary sources of gravitational waves (GWs) detectable by the Laser Interferometer Space Antenna (LISA). Detecting these sources provides an opportunity to unravel critical details about binary star evolution and the broader history of the Milky Way. Using results …
-
Wavefront modelling and sensing for advanced gravitational wave detectors
The Advanced Laser Interferometer Gravitational-wave Observatory (aLIGO) directly detected gravitational waves for the first time on the 14th of September 2015. In 2017 the detection of gravitational waves from a binary neutron star merger was subsequently followed up by observations by optical and …
-
Numerical modelling of gravitational wave sources in general relativity
The first direct detection of gravitational waves (GWs) from a black-hole (BH) binary, GW150914, by the advanced Laser Interferometer Gravitational-wave Observatory (aLIGO) detectors in 2015 heralded a new era in GW physics. Since then, over 90 compact binary merger events have been detected by the …
-
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 …
-
Exploring fundamental physics and astrophysics with gravitational-wave sources
… that can be learnt by the current and future gravitational wave (GW) observations. With the current observations, I study how multiple binary black hole (BBH) spin measurements can be combined by hierarchical Bayesian framework to search for ultralight bosons (e.g., axions). This search relies …
-
Open Issues in the search for gravitational wave transients
… network of kilometer-scale laser interferometric gravitational-wave detectors reached a major milestone with the successful operation of LIGO's fifth (S5) and Virgo's first (VSR1) science runs during 2005-2007. This thesis presents several issues related to gravitational-wave transient detection …
-
Active wavefront correction in laser interferometric gravitational wave detectors
As the first generation of laser interferometric gravitational wave detectors near operation, research and development has begun on increasing the instrument's sensitivity while utilizing existing infrastructure. In the Laser Interferometer Gravitational Wave Observatory (LIGO), significant …
Page 1 of 10