Gravitational-wave astrophysics of binary black holes. Do black holes live alone, or form lasting gravitational partnerships? This question is of immense significance to astronomers. The emerging field of gravitational-wave astronomy is set to provide the answers. This project aims to develop innovative strategies to search for black hole pairs using leading technologies built with Australian expertise.
Gravitational wave astrophysics with Laser Interferometer Gravitational-Wave Observatory (LIGO). The prediction that space and time vibrate is one of Einstein's greatest legacies, implying the existence of a new form of radiation with which to study the Universe. This project puts Australia in the vanguard of the billion-dollar effort worldwide to detect and harness this radiation for the first time.
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
Discovery Early Career Researcher Award - Grant ID: DE130101087
Funder
Australian Research Council
Funding Amount
$359,026.00
Summary
Modelling superfluid neutron stars. This project aims to construct realistic neutron star models, that will be used to interpret radio and x-ray data, but also to aid gravitational wave detection. These models will allow the study of matter at extreme densities in the stellar interior, well above nuclear density, thus making use of the most exciting physics laboratory in the cosmos.
An upgraded pulsar timing array for gravitational wave detection. Millisecond pulsars are remarkably regularly-rotating neutron stars that offer the opportunity to detect gravitational waves via the technique known as pulsar timing. Australia has long been a world leader in the discovery and timing of millisecond pulsars, and the Parkes pulsar timing array is one of three major programmes in the world aimed at making the first direct detection of gravitational waves in any frequency band. This p ....An upgraded pulsar timing array for gravitational wave detection. Millisecond pulsars are remarkably regularly-rotating neutron stars that offer the opportunity to detect gravitational waves via the technique known as pulsar timing. Australia has long been a world leader in the discovery and timing of millisecond pulsars, and the Parkes pulsar timing array is one of three major programmes in the world aimed at making the first direct detection of gravitational waves in any frequency band. This project is designed to capitalise on Australia's position of strength in this field by extending the Parkes Pulsar Timing Array dataset (PPTA) so that it has the best chance of detecting gravitational waves in the nanohertz regime until the SKA pathfinders start to come online in 2017.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
The diversity of core-collapse supernovae. This project aims to develop a comprehensive picture of the explosions of massive stars as core-collapse supernovae using high-end computer simulations. Such explosions come in many varieties and arise from different classes of progenitor stars. This project seeks to thoroughly understand this diversity. It endeavours to provide simulations of supernovae powered by magnetic fields, supernovae that produce black holes, supernovae in binary systems, and t ....The diversity of core-collapse supernovae. This project aims to develop a comprehensive picture of the explosions of massive stars as core-collapse supernovae using high-end computer simulations. Such explosions come in many varieties and arise from different classes of progenitor stars. This project seeks to thoroughly understand this diversity. It endeavours to provide simulations of supernovae powered by magnetic fields, supernovae that produce black holes, supernovae in binary systems, and the most energetic neutrino-driven supernovae. The project also aspires to better link numerical simulations, observations of supernovae and their remnants, and the nucleosynthesis fingerprints that supernovae have left in the chemical history record of galaxies.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE150101145
Funder
Australian Research Council
Funding Amount
$338,895.00
Summary
Before stars go supernova - in 3D. This project aims to understand the full three-dimensional structure of massive stars when they explode. In particular, the project will model the late evolution and burning stages of massive stars before they explode as core collapse supernovae. The violent nature of the thermonuclear burning during the star's last few minutes and seconds may cause significant deviations from spherical symmetry, in particular when considering rotating stars. Such realistic mod ....Before stars go supernova - in 3D. This project aims to understand the full three-dimensional structure of massive stars when they explode. In particular, the project will model the late evolution and burning stages of massive stars before they explode as core collapse supernovae. The violent nature of the thermonuclear burning during the star's last few minutes and seconds may cause significant deviations from spherical symmetry, in particular when considering rotating stars. Such realistic models are an essential ingredient for any realistic supernova model, and for understanding how these supernovae synthesise the entire range of elements (from lightest to the heaviest) in the universe.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE220100241
Funder
Australian Research Council
Funding Amount
$421,540.00
Summary
Discovering the origin of gravitational waves. This project aims to discover the astrophysical origin of gravitational waves. This project expects to calculate the properties of neutron stars and black holes in binaries, using state-of-the-art simulations performed on the largest Australian supercomputers. Expected outcomes of this project include comparisons between gravitational-wave observations and theory using advanced statistical and machine learning techniques, providing new and unique in ....Discovering the origin of gravitational waves. This project aims to discover the astrophysical origin of gravitational waves. This project expects to calculate the properties of neutron stars and black holes in binaries, using state-of-the-art simulations performed on the largest Australian supercomputers. Expected outcomes of this project include comparisons between gravitational-wave observations and theory using advanced statistical and machine learning techniques, providing new and unique insights into the most massive stars in the Universe. This project should provide significant benefits such as answering key questions about the Universe, cementing Australia's place in the international astronomical community and inspiring and training future generations of Australia's workforce.Read moreRead less
Discovery Early Career Researcher Award - Grant ID: DE210101050
Funder
Australian Research Council
Funding Amount
$350,898.00
Summary
Exploding massive stars and their implications for gravitational waves. This project aims to perform simulations of core-collapse supernovae, the explosive death of massive stars, to better understand their explosion properties, remnant properties, and gravitational wave emission. This project expects to produce gravitational wave emission predictions in previously unexplored areas of the supernova progenitor parameter space. The expected outcomes of this project include novel gravitational wave ....Exploding massive stars and their implications for gravitational waves. This project aims to perform simulations of core-collapse supernovae, the explosive death of massive stars, to better understand their explosion properties, remnant properties, and gravitational wave emission. This project expects to produce gravitational wave emission predictions in previously unexplored areas of the supernova progenitor parameter space. The expected outcomes of this project include novel gravitational wave data analysis tools, and a better understanding of the birth properties of neutron stars and black holes. This should provide significant benefits, such as improving our understanding of the astrophysics behind core-collapse supernovae, and improving our understanding of neutron star and black hole populations.Read moreRead less