Virtual Star Clusters: The Dynamics and Evolution of Stars and Planets. Most stars are born in star clusters. When stars age
they swell and contract, change composition,
lose mass, and in dense regions they may collide.
Further, about 50% of stars are binary pairs,
and when these swell they can merge or
transfer mass. These effects dramatically
alter the lives of stars and their chemical makeup.
By combining special
purpose computers with newly developed simulation techniques,
we will ....Virtual Star Clusters: The Dynamics and Evolution of Stars and Planets. Most stars are born in star clusters. When stars age
they swell and contract, change composition,
lose mass, and in dense regions they may collide.
Further, about 50% of stars are binary pairs,
and when these swell they can merge or
transfer mass. These effects dramatically
alter the lives of stars and their chemical makeup.
By combining special
purpose computers with newly developed simulation techniques,
we will include all these effects to answer timely
and important astronomical
questions such as: can planets survive life in
a cluster? how do interactions between stars
affect the chemical enrichment of
clusters and galaxies?Read moreRead less
The role of magnetic fields in star formation. Recently we have performed the world's first calculations of star cluster formation that incorporate the effects of magnetic fields and radiation. This research has recently been brought back to Australia and the goal of this proposal is to extend our competitive edge in this area.
Whilst calculations of the formation of stars gives us fundamental understanding about a very basic physical process in the universe (namely, the conversion of gas into s ....The role of magnetic fields in star formation. Recently we have performed the world's first calculations of star cluster formation that incorporate the effects of magnetic fields and radiation. This research has recently been brought back to Australia and the goal of this proposal is to extend our competitive edge in this area.
Whilst calculations of the formation of stars gives us fundamental understanding about a very basic physical process in the universe (namely, the conversion of gas into stars), the equations we solve and the methods used to solve them, are the same as those used to describe many gases and fluids on earth. Solving these equations in difficult astrophysical regimes develops new methodology which translates readily to earth-bound problems.Read moreRead less
The next generation of stellar models: incorporating the results of multidimensional hydrodynamics. This project involves the use of computer codes designed for massively-parallel computing, thousands of computers tied together into one cluster, to tackle difficult hydrodynamic problems that occur in stars. We will train PhD students in this area of cutting-edge computation, with applications in areas such as meteorology, aero-space and defence. The skills gained by the participants in this proj ....The next generation of stellar models: incorporating the results of multidimensional hydrodynamics. This project involves the use of computer codes designed for massively-parallel computing, thousands of computers tied together into one cluster, to tackle difficult hydrodynamic problems that occur in stars. We will train PhD students in this area of cutting-edge computation, with applications in areas such as meteorology, aero-space and defence. The skills gained by the participants in this project will be useful over a wide range of areas in the modern economy of the nation.Read moreRead less
Super-AGB Stars: the Missing Link? By being the first to investigate a specific class of stars, Australia will also be the first to reap the scientific rewards from the many applications that will follow - including the chemical history of
the Galaxy and how globular clusters form. We will also develop large-scale computing tools using the latest in cluster computing technology to study the multi-dimensional character of a special class
of supernova explosion. We extend a fruitful collaboratio ....Super-AGB Stars: the Missing Link? By being the first to investigate a specific class of stars, Australia will also be the first to reap the scientific rewards from the many applications that will follow - including the chemical history of
the Galaxy and how globular clusters form. We will also develop large-scale computing tools using the latest in cluster computing technology to study the multi-dimensional character of a special class
of supernova explosion. We extend a fruitful collaboration with a super-computer centre in the US and also train graduate students in advanced computing techniques for Australia's future, in both science and other applications and technologies.Read moreRead less
Plasma Astrophysics under Extreme Conditions. A new branch of theoretical physics, quantum plasmadynamics (QPD), will be applied to plasmas under extreme conditions of magnetic field and density, to plasma-neutrino effects and nonlinear radiation.
Magnetic energy dissipation in solar flares will be attributed to a large number of coupled, local, transient, anomalously resistive regions excited by current filamentation. The model will include nonlocal energy release at Alfvenic fronts, 3D reconn ....Plasma Astrophysics under Extreme Conditions. A new branch of theoretical physics, quantum plasmadynamics (QPD), will be applied to plasmas under extreme conditions of magnetic field and density, to plasma-neutrino effects and nonlinear radiation.
Magnetic energy dissipation in solar flares will be attributed to a large number of coupled, local, transient, anomalously resistive regions excited by current filamentation. The model will include nonlocal energy release at Alfvenic fronts, 3D reconnection at magnetic nulls, and bulk energization of electrons.
`Coherence? in sources of coherent emission will be quantified and a model for its interpretation for highly intermittent wave growth will be formulated.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
Imaging circumstellar matter at high resolution. Within contemporary astrophysics there is a particular fascination with matter in near-stellar environments. Studies of stellar and planetary systems from formation through to eventual destruction entail observation of material, principally dust and gas, playing their parts on a very remote stage. A new generation of telescopes, known as interferometers, deliver extremely high resolutions enabling our first direct glimpses of these phenomena. Here ....Imaging circumstellar matter at high resolution. Within contemporary astrophysics there is a particular fascination with matter in near-stellar environments. Studies of stellar and planetary systems from formation through to eventual destruction entail observation of material, principally dust and gas, playing their parts on a very remote stage. A new generation of telescopes, known as interferometers, deliver extremely high resolutions enabling our first direct glimpses of these phenomena. Here I propose using a number of these devices in concert in order to dramatically enhance their scientific payoff. In addition to enabling unique studies of stellar systems, new techniques for merging disparate data into powerful combined forms will be devised.Read moreRead less