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Atomic tests of unification theories. Although the standard model of particle physics has withstood decades of intensive experimental tests, it is widely believed to be merely a low-energy manifestation of a "true" theory that unifies the four forces of nature. While some searches for new physics beyond the standard model are performed at high-energy particle accelerators, a very sensitive probe can be done at low energies in atomic and molecular measurements of weak interaction effects. This pr ....Atomic tests of unification theories. Although the standard model of particle physics has withstood decades of intensive experimental tests, it is widely believed to be merely a low-energy manifestation of a "true" theory that unifies the four forces of nature. While some searches for new physics beyond the standard model are performed at high-energy particle accelerators, a very sensitive probe can be done at low energies in atomic and molecular measurements of weak interaction effects. This project is devoted to a theoretical investigation of weak interaction effects in atoms, molecules, and nuclei. It will provide improved tests of unified theories.Read moreRead less
Before Planets: The Mineralogy and Chemistry of Pre-Planetary Disks. Planets form within the circumstellar disks around young stars. Samples of the solid material composing our own primitive disk are found in meteorites and interplanetary dust particles. Using the powerful technique of astronomical mid-infrared spectropolarimetry, we will ascertain the composition of the material existing within the disks around young stars. By studying a range of disk ages we will determine how the composition ....Before Planets: The Mineralogy and Chemistry of Pre-Planetary Disks. Planets form within the circumstellar disks around young stars. Samples of the solid material composing our own primitive disk are found in meteorites and interplanetary dust particles. Using the powerful technique of astronomical mid-infrared spectropolarimetry, we will ascertain the composition of the material existing within the disks around young stars. By studying a range of disk ages we will determine how the composition evolves with time, and what physical processes affect it, in order to better understand how our own solar system formed. Further, we will image these disks in mm-wave molecular emission and constrain their chemistry and rotational properties.Read moreRead less
Habitable planets and stellar oscillations with the NASA Kepler mission. This project will ensure Australia's participation in a large space mission, which will detect habitable planets, like our own, around stars. We will build strong links to leading international institutions, supply high-level training for students in information processing skills, and develop new techniques for data analysis that are directly relevant to future space missions. This will position Australia in space explorati ....Habitable planets and stellar oscillations with the NASA Kepler mission. This project will ensure Australia's participation in a large space mission, which will detect habitable planets, like our own, around stars. We will build strong links to leading international institutions, supply high-level training for students in information processing skills, and develop new techniques for data analysis that are directly relevant to future space missions. This will position Australia in space exploration, with potential spin-offs for Australian industry. The science of this project will lead to a breakthrough in our understanding of the structure and evolution of stars and their planets, which will enhance Australia's reputation in these two fields of research.Read moreRead less
Nanotribology and Nanorheometry: A Fundamental Study of the Dynamic Interactions of Particles and Surfaces at the Molecular Level. Friction and deformation occur from the mutual motion and interaction of microscopic particles and surfaces. This research aims to develop new theories and measurement techniques for these non-equilibrium phenomena by combining mathematical analysis and numerical computations with dynamic force measurement, surface modification, and surface characterisation on nanom ....Nanotribology and Nanorheometry: A Fundamental Study of the Dynamic Interactions of Particles and Surfaces at the Molecular Level. Friction and deformation occur from the mutual motion and interaction of microscopic particles and surfaces. This research aims to develop new theories and measurement techniques for these non-equilibrium phenomena by combining mathematical analysis and numerical computations with dynamic force measurement, surface modification, and surface characterisation on nanometre and molecular length scales. These insights and data will be critically important in designing low-friction surfaces that save energy and wear, in developing nanoscopic probes for the mechanical and structural properties of soft polymeric and bio-materials, and in making high performance coatings that control adhesion and particle aggregation in technologically advanced applications.Read moreRead less
Molecules as probes of the interstellar medium. It is one of the greatest challenges in Nature is to remotely identify what is in space. Interstellar molecules are identified by their spectra, but many features in these spectra are unknown, implying that there are many more molecules in space than we know about. With a stronger understanding of space chemistry, we could predict what should be there and verify it in the lab. Conversely, identification of these features will provide the tools to u ....Molecules as probes of the interstellar medium. It is one of the greatest challenges in Nature is to remotely identify what is in space. Interstellar molecules are identified by their spectra, but many features in these spectra are unknown, implying that there are many more molecules in space than we know about. With a stronger understanding of space chemistry, we could predict what should be there and verify it in the lab. Conversely, identification of these features will provide the tools to understand interstellar chemistry. In this project we combine skills in spectroscopy and astronomy to make these molecules in the laboratory, measure their spectra and thereby identify unknown molecules in space.Read moreRead less
Optical Spectroscopy of Extraterrestrial Molecules. Space is not empty. In the vast regions between stars is a complex soup of molecules. Some of these molecules get incorporated into meteorites and find their way to Earth where they can be identified. Analysis has yielded amino acids; the building blocks of life, but these molecules do not match what we know about the interstellar regions. Interstellar molecules are identified by their spectra, but many features in these spectra are unknown. ....Optical Spectroscopy of Extraterrestrial Molecules. Space is not empty. In the vast regions between stars is a complex soup of molecules. Some of these molecules get incorporated into meteorites and find their way to Earth where they can be identified. Analysis has yielded amino acids; the building blocks of life, but these molecules do not match what we know about the interstellar regions. Interstellar molecules are identified by their spectra, but many features in these spectra are unknown. Could they be caused by the missing molecules? In this project we combine the skills of three spectroscopists, each expert in different areas, in an attempt to make these molecules in the laboratory, measure their spectra and thereby identify these unknown molecules that are in space.Read moreRead less
Roaming around the Transition State: A New Mechanism of Chemical Reactions. Gas-phase reaction mechanisms are at the core of some of the most important problems facing Australia at present: atmospheric models for CO2 are central to climate change; models of isotope exchange are essential to learn about past climates from Antarctic ice cores; and models of combustion are used to optimise energy efficiency. The mechanisms used in these models rely on accurate chemistry. A newly discovered chemica ....Roaming around the Transition State: A New Mechanism of Chemical Reactions. Gas-phase reaction mechanisms are at the core of some of the most important problems facing Australia at present: atmospheric models for CO2 are central to climate change; models of isotope exchange are essential to learn about past climates from Antarctic ice cores; and models of combustion are used to optimise energy efficiency. The mechanisms used in these models rely on accurate chemistry. A newly discovered chemical mechanism has the potential to change many of the reactions that we currently use in these chemical models. This project will determine how important this new mechanism is, and what its impact is on gas-phase reaction models.Read moreRead less
How many bright stars of the night sky harbour planets? The search for planets around stars is one of the grand endeavours that defines the modern era of astronomy. This project will develop two innovative technologies that will lead this field into new observational terrain: high-contrast aperture masking interferometry at large telescopes, and very narrow angle astrometry at the Sydney University Stellar Interferometer. These new instruments will enable the search for planets around the bright ....How many bright stars of the night sky harbour planets? The search for planets around stars is one of the grand endeavours that defines the modern era of astronomy. This project will develop two innovative technologies that will lead this field into new observational terrain: high-contrast aperture masking interferometry at large telescopes, and very narrow angle astrometry at the Sydney University Stellar Interferometer. These new instruments will enable the search for planets around the bright intermediate-mass stars of our southern sky, and will target the critical orbital scales of planets at solar-system scale separations. This encompasses the habitable zone where conditions could support life, and the sample will have immediate impact on fundamental questions of planetary formation.Read moreRead less
The First Deep Infrared Study of the Nearby Galaxy Population. We will conduct two major near-infrared (IR) surveys: The Southern Galactic Cap near-IR survey, and the Local Sphere of Influence survey. These surveys will capitalise on the innovative and award winning Australian IRIS2 facility. The two surveys push the observational frontier by orders of magnitude. They will be used to explore the close connection between the near-IR global properties of a galaxy and its underlying physics and pro ....The First Deep Infrared Study of the Nearby Galaxy Population. We will conduct two major near-infrared (IR) surveys: The Southern Galactic Cap near-IR survey, and the Local Sphere of Influence survey. These surveys will capitalise on the innovative and award winning Australian IRIS2 facility. The two surveys push the observational frontier by orders of magnitude. They will be used to explore the close connection between the near-IR global properties of a galaxy and its underlying physics and provide a generic local reference for the upcoming next generation infrared space-telescope missions.
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Realistic models of permeation in ion channels. Ion channels are formed by proteins in cell membranes and provide pathways for fast and controlled flow of selected ions. This activity generates action potentials in nerves and muscles that forms the basis of all movement, sensation and thought processes. Recent determination of the crystal structure of channel proteins has enabled construction of models that can relate channel function to its structure--necessary for understanding their operati ....Realistic models of permeation in ion channels. Ion channels are formed by proteins in cell membranes and provide pathways for fast and controlled flow of selected ions. This activity generates action potentials in nerves and muscles that forms the basis of all movement, sensation and thought processes. Recent determination of the crystal structure of channel proteins has enabled construction of models that can relate channel function to its structure--necessary for understanding their operation and seeking cures for diseases caused by their malfunction. This project aims to develop accurate ion-protein-water interactions for permeation models based on stochastic and molecular dynamics simulations using both classical and quantum mechanical methods.Read moreRead less