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
Studies of turbulence and coherent structures in quasi two-dimensional plasmas and fluids. One of the most celebrated but least understood complex systems in nature is turbulent flow. This cross-disciplinary project aims to contribute to basic scientific knowledge of a class of turbulent flows, known as quasi two-dimensional fluids, that typically exhibit self-organizing properties, stable sheared flow, and relatively weak dissipation. The significance lies in the proposed testing, by modelling ....Studies of turbulence and coherent structures in quasi two-dimensional plasmas and fluids. One of the most celebrated but least understood complex systems in nature is turbulent flow. This cross-disciplinary project aims to contribute to basic scientific knowledge of a class of turbulent flows, known as quasi two-dimensional fluids, that typically exhibit self-organizing properties, stable sheared flow, and relatively weak dissipation. The significance lies in the proposed testing, by modelling and simulation studies, of the well-grounded hypothesis that suppression of turbulence by sheared flow is a universal phenomenon in such fluids, and that it can be exploited to control transport of fluid constituents. Applications of this new knowledge will be developed.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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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
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
Dynamics of Multiscale Complex Systems. Australia has built a strong position in the science and applications of multiscale phenomena, especially in interdisciplinary fields. The project will advance this position in plasma and biomedical physics by making new discoveries, developing new methods of analyzing such systems, and applying them to achieve practical outcomes. It will underpin Australia's participation in NASA's $600M STEREO mission, and will lead to improved methods and technologies ....Dynamics of Multiscale Complex Systems. Australia has built a strong position in the science and applications of multiscale phenomena, especially in interdisciplinary fields. The project will advance this position in plasma and biomedical physics by making new discoveries, developing new methods of analyzing such systems, and applying them to achieve practical outcomes. It will underpin Australia's participation in NASA's $600M STEREO mission, and will lead to improved methods and technologies for brain function analysis and imaging, which will be commercialized via industry partnerships. It will contribute to national research goals, especially in Breakthrough Science, Frontier Technologies, Smart Information Use, and Promoting Innovation.Read moreRead less
Dust Physics: a Challenge in International Thermonuclear Experimental Reactor. This proposal is highly relevant to development of the electricity-producing fusion power plants. The outcomes will contribute to the achievement of greater control, predictability, and cost efficiency of fusion reactors operation. The project falls within the " An Environmentally Sustainable Australia " research priority and will contribute to development of widely available energy source with essentially unlimited ....Dust Physics: a Challenge in International Thermonuclear Experimental Reactor. This proposal is highly relevant to development of the electricity-producing fusion power plants. The outcomes will contribute to the achievement of greater control, predictability, and cost efficiency of fusion reactors operation. The project falls within the " An Environmentally Sustainable Australia " research priority and will contribute to development of widely available energy source with essentially unlimited supply and manageable environmental impact. Read moreRead less