General relativistic light propagation effects: new insight into cosmic voids, dark matter, dark energy, and Einstein's theory of gravity. This project aims to be the first to develop new methods which will allow accurate study of light propagation effects. These methods remove the “noise” (light propagation effects) from observational data, resulting in unprecedented accuracy of the analyses and new insight into properties of dark energy. At the same time these methods use the “noise” as the ac ....General relativistic light propagation effects: new insight into cosmic voids, dark matter, dark energy, and Einstein's theory of gravity. This project aims to be the first to develop new methods which will allow accurate study of light propagation effects. These methods remove the “noise” (light propagation effects) from observational data, resulting in unprecedented accuracy of the analyses and new insight into properties of dark energy. At the same time these methods use the “noise” as the actual signal to measure properties of the Universe, especially the mass distribution inside cosmic voids (places in the Universe avoided by galaxies), which will solve the problem of dark matter distribution inside cosmic voids. The project aims to use light propagation effects to test Einstein's theory of gravity at cosmological scales.Read moreRead less
Precision cosmic expansion in the era of gravitational-wave astronomy. The disagreement in the size of the cosmic expansion rate, between measurements from local galaxy indicators and predictions from the early Universe, is a crisis for cosmology. This Project aims to resolve this situation using recent scientific breakthroughs in both observations and theory. We will optimise expansion measurements from the standard sirens discovered by gravitational-wave astronomy by accurate modelling of th ....Precision cosmic expansion in the era of gravitational-wave astronomy. The disagreement in the size of the cosmic expansion rate, between measurements from local galaxy indicators and predictions from the early Universe, is a crisis for cosmology. This Project aims to resolve this situation using recent scientific breakthroughs in both observations and theory. We will optimise expansion measurements from the standard sirens discovered by gravitational-wave astronomy by accurate modelling of the cosmic velocity field which limits this analysis. And we will use recent breakthoughs in numerical general relativity to explore the influence of space-time curvature variations on these measurements. We will hence improve our understanding of the most important parameter describing the Universe, and its physics.Read moreRead less
A Space Odyssey: Exploring the Universe with Gravitational-Wave Sirens. How fast is the Universe expanding? This project aims to produce the most precise measurement to date of the present day expansion rate of the Universe using gravitational waves and thus resolve current tensions plaguing existing measurements. We plan to develop the most comprehensive catalogue of gravitational waves and their hosts using the largest galaxy surveys in the world and use innovative statistical techniques to ex ....A Space Odyssey: Exploring the Universe with Gravitational-Wave Sirens. How fast is the Universe expanding? This project aims to produce the most precise measurement to date of the present day expansion rate of the Universe using gravitational waves and thus resolve current tensions plaguing existing measurements. We plan to develop the most comprehensive catalogue of gravitational waves and their hosts using the largest galaxy surveys in the world and use innovative statistical techniques to extract cosmological measurements from them. Expected outcomes include new knowledge of what the Universe is made of and how it has evolved, and enhanced international collaboration between Australia and other survey member countries. Anticipated benefits include new software and methods for the analysis of big data.Read moreRead less
Weighing the Universe using fast radio bursts. Fast radio bursts are a newly-discovered astronomical phenomenon whose millisecond-timescale emission occurs at cosmological distances, rendering them exceptional probes of the matter that lies in intergalactic space. This project aims to measure the positions and obtain the distances to these bursts to make a direct measurement of the density of ordinary matter in the Universe, at least 50 per cent of which is believed to remain undetected in inter ....Weighing the Universe using fast radio bursts. Fast radio bursts are a newly-discovered astronomical phenomenon whose millisecond-timescale emission occurs at cosmological distances, rendering them exceptional probes of the matter that lies in intergalactic space. This project aims to measure the positions and obtain the distances to these bursts to make a direct measurement of the density of ordinary matter in the Universe, at least 50 per cent of which is believed to remain undetected in intergalactic space. This project will measure the distribution of this missing matter, and find how it has evolved throughout the history of the Universe. This will provide significant benefits, such as addressing two fundamental questions about our Universe: how much matter does it contain, and has a large fraction of it hitherto evaded detection in intergalactic space?Read moreRead less
Australian Laureate Fellowships - Grant ID: FL180100168
Funder
Australian Research Council
Funding Amount
$2,899,722.00
Summary
Illuminating the dark universe. This project aims to measure and explain the dark side of the universe, by performing new theoretical analyses of two groundbreaking surveys. Dark energy and dark matter are amongst the most profound puzzles facing fundamental physics. The Dark Energy Survey expects to discover approximately 3000 supernovae, and using The Dark Energy Spectroscopic Instrument will measure distances to 30 million galaxies. This project will combine these findings to determine whethe ....Illuminating the dark universe. This project aims to measure and explain the dark side of the universe, by performing new theoretical analyses of two groundbreaking surveys. Dark energy and dark matter are amongst the most profound puzzles facing fundamental physics. The Dark Energy Survey expects to discover approximately 3000 supernovae, and using The Dark Energy Spectroscopic Instrument will measure distances to 30 million galaxies. This project will combine these findings to determine whether dark energy changes with time, narrow the search for a quantum theory of gravity, and complete the standard model of particle physics by measuring the mass of the neutrino, a subatomic particle. This will substantially advance our understanding of the physics of our Universe, inspiring the next generation of innovators.Read moreRead less
Gravitational wave detection with current and future radio telescopes. This project will aim to detect gravitational waves using precision pulsar timing observations. Direct detection of these waves is of huge international importance and will keep Australia at the forefront of the new research field of gravitational wave astronomy that will continue to grow with the planned radio telescopes of the future.
Discovery Early Career Researcher Award - Grant ID: DE190100437
Funder
Australian Research Council
Funding Amount
$338,774.00
Summary
Advanced technologies for next generation gravitational wave detectors. This project aims to investigate a novel scheme that uses signals present in interferometers to directly control and stabilise the shapes of mirrors to atomic scale precision. The discovery of gravitational waves from colliding black holes and neutron stars was made possible by the development of large-scale, high-laser-power interferometers. The project builds on experience with current detectors and aims to develop techniq ....Advanced technologies for next generation gravitational wave detectors. This project aims to investigate a novel scheme that uses signals present in interferometers to directly control and stabilise the shapes of mirrors to atomic scale precision. The discovery of gravitational waves from colliding black holes and neutron stars was made possible by the development of large-scale, high-laser-power interferometers. The project builds on experience with current detectors and aims to develop techniques that will provide the next leap in sensitivity by improving control of the quantum state of light. The project will also test a new technique called white light resonance, which has the revolutionary capability of increasing sensitivity over a broad frequency range. The project will help maintain Australia’s significant impact on the worldwide effort to harness gravitational waves.Read moreRead less
Dark matter, dark energy, and dark flow: galaxy motion reveals fundamental physics. The twin mysteries of dark matter and dark energy present a profound challenge to modern physics. Capitalising on new Australian technology to measure the motion of tens of thousands of galaxies, we will detect unseen matter by its gravitational influence and thus illuminate the nature of the dark components of the universe.
AIM-GWM: Afterglow Imaging and Modelling of Gravitational-Wave Mergers. This project aims to capitalise on the dawn of the era of gravitational wave astronomy by studying the radio afterglows that result from gravitational wave merger events in minute detail. By comparing ultra-high resolution images to sophisticated computational models, we anticipate recovering information about the merger events that cannot be obtained from the gravitational wave data alone. In doing so, we expect new insight ....AIM-GWM: Afterglow Imaging and Modelling of Gravitational-Wave Mergers. This project aims to capitalise on the dawn of the era of gravitational wave astronomy by studying the radio afterglows that result from gravitational wave merger events in minute detail. By comparing ultra-high resolution images to sophisticated computational models, we anticipate recovering information about the merger events that cannot be obtained from the gravitational wave data alone. In doing so, we expect new insights into not just of the extreme and unique physics in the aftermath of a violent neutron star merger, but also about the fundamental nature of the Universe, namely the speed at which it is expanding. This knowledge will provide significant benefits to astronomers studying the Universe at all wavelengths.Read moreRead less
Radio follow-up of gravitational wave events. This project aims to use three Australian radio telescopes to search for and monitor radio waves from future gravitational wave events. The detection of gravitational waves and electromagnetic radiation from a neutron star merger was a scientific breakthrough, with important implications for physics and astronomy. The observations from this project will provide key information to reveal what causes some of the most energetic events in the Universe, t ....Radio follow-up of gravitational wave events. This project aims to use three Australian radio telescopes to search for and monitor radio waves from future gravitational wave events. The detection of gravitational waves and electromagnetic radiation from a neutron star merger was a scientific breakthrough, with important implications for physics and astronomy. The observations from this project will provide key information to reveal what causes some of the most energetic events in the Universe, their environment and how they evolve. The outcomes of this project include increased international collaboration with this global effort, and new techniques for automatic data processing and analysis, as well as engaging future students as we build Australian expertise in a new area of research.Read moreRead less