Physics of extreme brightness temperatures in radioastronomical sources. Pulsars and some quasars are so very bright that the conventional explanation for radioastronomical emission from other sources either does not apply to them, or presents unsolved problems. We see (in radio waves) these sources through the interstellar medium which acts like a wrinkled pane of glass in distorting the image. New scientific ideas and methodologies are proposed here and will be explored in the project, with th ....Physics of extreme brightness temperatures in radioastronomical sources. Pulsars and some quasars are so very bright that the conventional explanation for radioastronomical emission from other sources either does not apply to them, or presents unsolved problems. We see (in radio waves) these sources through the interstellar medium which acts like a wrinkled pane of glass in distorting the image. New scientific ideas and methodologies are proposed here and will be explored in the project, with the objective to understand these sources and to extract information on their propreties and those of the interstellar medium. Read moreRead less
Interstellar Gas Dynamics. The conversion of interstellar gas into stars is a key process in the life-history of galaxies and the formation of planetary systems. Star formation takes place within a heterogeneous, dynamic cloud, and entails a million-fold contraction controlled by a complex interplay between gravity, magnetic forces, ionisation balance, chemical reactions and particles of interstellar dust. Previous modelling has adopted inappropriate approximations for the evolution of the mag ....Interstellar Gas Dynamics. The conversion of interstellar gas into stars is a key process in the life-history of galaxies and the formation of planetary systems. Star formation takes place within a heterogeneous, dynamic cloud, and entails a million-fold contraction controlled by a complex interplay between gravity, magnetic forces, ionisation balance, chemical reactions and particles of interstellar dust. Previous modelling has adopted inappropriate approximations for the evolution of the magnetic field. This research will bring a rigorous treatment of magnetic diffusion to bear on the theory of cloud evolution, shock waves, star formation and protoplanetary discs.
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Prediction of solar activity and space weather by automated analyses of solar radio and magnetic field observations and simulations. This project will build world-recognised capabilities to forecast space weather events at Earth in time to take protective measures. It involves around the clock automated identification and analysis of specific solar radio bursts, forecasting solar activity that results in transients moving Earth-ward, and simulations to predict when these will reach Earth.
Space weather prediction via automated data analysis systems. The project will build world-recognised capabilities in forecasting space weather events at Earth, in time to take protective measures, identifying and analysing solar drivers of space weather, and modelling interplanetary space. Australia's scientific standing, expertise, and infrastructure will be strengthened in space science, complex systems, and multiple fields of physics. Better predictions will increase the utility of Ionosphe ....Space weather prediction via automated data analysis systems. The project will build world-recognised capabilities in forecasting space weather events at Earth, in time to take protective measures, identifying and analysing solar drivers of space weather, and modelling interplanetary space. Australia's scientific standing, expertise, and infrastructure will be strengthened in space science, complex systems, and multiple fields of physics. Better predictions will increase the utility of Ionospheric Prediction Service services to customers in government, industry, and society, leading to better communications, more assured access to space services, and reduced risks of damage to critical infrastructure. The project will enhance Australia's human capital and its role in global space efforts.Read moreRead less
The application of Markov Chain Monte Carlo methods to the search for space-time variations of fundamental constants. This work will establish Australia as the world leader in one of the most vibrant topics in current physics research. The results obtained could reveal extra dimensions in our universe and provide the first experimental evidence for string theories. The proposed research will also fundamental new information about dark matter and dark energy, the two most pressing problems in c ....The application of Markov Chain Monte Carlo methods to the search for space-time variations of fundamental constants. This work will establish Australia as the world leader in one of the most vibrant topics in current physics research. The results obtained could reveal extra dimensions in our universe and provide the first experimental evidence for string theories. The proposed research will also fundamental new information about dark matter and dark energy, the two most pressing problems in cosmology. The solutions of these problems will revolutionise our understanding of the universe. This program involves collaborations with major international institutes and provides a superb training-ground for Australian postgraduate students.Read moreRead less
Wave energy transport, conversion and dissipation in near-Earth space. The near-Earth space environment is characterised by cycles of energy transport, conversion and release through particle acceleration that lead to dazzling aurora and damaged spacecraft and communication systems. This research seeks to identify how this energy is transported through space and the means through which it is converted and released.
High-energy probes of dense matter and distorted spacetime. This is an ambitious but achievable program with the potential for results which will be highly significant to physicists worldwide. The expected outcomes have the potential to alter our understanding of fundamental physics, and will demonstrate that Australia's high-energy research ability is on par with the world's best. The techniques of X-ray astronomy are increasingly a standard part of the professional astronomer's toolkit, althou ....High-energy probes of dense matter and distorted spacetime. This is an ambitious but achievable program with the potential for results which will be highly significant to physicists worldwide. The expected outcomes have the potential to alter our understanding of fundamental physics, and will demonstrate that Australia's high-energy research ability is on par with the world's best. The techniques of X-ray astronomy are increasingly a standard part of the professional astronomer's toolkit, although Australia has a limited track record in recent years. The international collaborations that this project will build and maintain will help to improve access to, and utilisation of, multi-million dollar international satellite observatories by local observers.Read moreRead less
Ground based monitoring of plasma dynamics in the magnetosphere. We will use a new technique to study the plasmapause, a fundamental and highly dynamic boundary in geospace. This is usually examined using spacecraft and ground-based VLF measurements, but these suffer several limitations. We have developed the ability to monitor plasma density in geospace, by measuring the resonant frequency of geomagnetic field line oscillations. This project will use data from extensive ground magnetometer a ....Ground based monitoring of plasma dynamics in the magnetosphere. We will use a new technique to study the plasmapause, a fundamental and highly dynamic boundary in geospace. This is usually examined using spacecraft and ground-based VLF measurements, but these suffer several limitations. We have developed the ability to monitor plasma density in geospace, by measuring the resonant frequency of geomagnetic field line oscillations. This project will use data from extensive ground magnetometer arrays to thus study the spatial and temporal variation in particle density near the plasmapause. Comparison with VLF and spacecraft measurements will provide new information on the plasma composition and dynamics in this important region.Read moreRead less
Fundamental Physics from Accreting Neutron Stars. This is a bold and novel program with the potential for results which will be highly significant to physicists worldwide. The expected outcomes will demonstrate that Australia's high-energy research ability is on par with the world's best. The techniques of X-ray astronomy are increasingly a standard part of the professional astronomer's toolkit, although Australia has a limited track record in recent years. This DP will boost the multiwavelength ....Fundamental Physics from Accreting Neutron Stars. This is a bold and novel program with the potential for results which will be highly significant to physicists worldwide. The expected outcomes will demonstrate that Australia's high-energy research ability is on par with the world's best. The techniques of X-ray astronomy are increasingly a standard part of the professional astronomer's toolkit, although Australia has a limited track record in recent years. This DP will boost the multiwavelength capability of local astronomers by attracting a talented postdoc with experience in X-ray astronomy to Australia, as well as supporting a broader effort to transfer such skills to local students and researchers.Read moreRead less
Feedback Processes in Galaxy Formation. We have an opportunity to combine the best Australian theory with the best local and international telescopes, to probe the murky story of how galaxies form and why they look they way they do today. By looking back to a time when the Universe was only 1 billion years old, and comparing what we see with cutting edge supercomputer simulations plus pure theory, we will gain insight into the birth of entire galaxies. The results will form part of the study o ....Feedback Processes in Galaxy Formation. We have an opportunity to combine the best Australian theory with the best local and international telescopes, to probe the murky story of how galaxies form and why they look they way they do today. By looking back to a time when the Universe was only 1 billion years old, and comparing what we see with cutting edge supercomputer simulations plus pure theory, we will gain insight into the birth of entire galaxies. The results will form part of the study of how the universe works - that is driving astrophysics today, and represents pure research for the sake of advancing knowledge and showing us where we fit into the Universe. In doing so we will also advance Australia's base of theoretical and computational expertise.Read moreRead less