Saturn in hot water: viscous evolution of the Enceladus torus (2008)
The detection of outgassing water vapor from Enceladus is one of the great breakthroughs of the Cassini mission. The fate of this water once ionized has been widely studied; here we investigate the...
Self-Similar Force-Free Wind From an Accretion Disk (2006)
Narayan, Ramesh, McKinney, Jonathan C., Farmer, Alison J.
We consider a self-similar force-free wind flowing out of an infinitely thin disk located in the equatorial plane. On the disk plane, we assume that the magnetic stream function $P$ scales as...
Spontaneous axisymmetry breaking of Saturn's external magnetic field (2006)
Goldreich, Peter, Farmer, Alison J.
Saturn's magnetic field is remarkably axisymmetric. Its dipole axis is inclined by less than 0.2 deg with respect to its rotation axis. Rotationally driven convection of magnetospheric plasma breaks...
Understanding the Behavior of Prometheus and Pandora (2005)
Farmer, Alison J., Goldreich, Peter
We revisit the dynamics of Prometheus and Pandora, two small moons flanking Saturn's F ring. Departures of their orbits from freely precessing ellipses result from mutual interactions via their...
Understanding the behavior of Prometheus and Pandora (2005)
Farmer, Alison J., Goldreich, Peter
We revisit the dynamics of Prometheus and Pandora, two small moons flanking Saturn's F ring. Departures of their orbits from freely precessing ellipses result from mutual interactions via their...
Spoke formation under moving plasma clouds (2005)
Farmer, Alison J., Goldreich, Peter
Goertz and Morfill (1983) propose that spokes on Saturn's rings form under radially moving plasma clouds produced by meteoroid impacts. We demonstrate that the speed at which a plasma cloud can move...
Wave damping by MHD turbulence and its effect upon cosmic ray propagation in the ISM (2003)
Farmer, Alison J., Goldreich, Peter
Cosmic rays scatter off magnetic irregularities (Alfven waves) with which they are resonant, that is waves of wavelength comparable to their gyroradii. These waves may be generated either by the...
Optical Identification of Close White Dwarf Binaries in the LISA Era (2003)
Cooray, Asantha, Farmer, Alison J., Seto, Naoki
The Laser Interferometer Space Antenna (LISA) is expected to detect close white dwarf binaries (CWDBs) through their gravitational radiation. Around 3000 binaries will be spectrally resolved at...
The Gravitational Wave Background from Cosmological Compact Binaries (2003)
Farmer, Alison J., Phinney, E. S.
We use a population synthesis approach to characterise, as a function of cosmic time, the extragalactic close binary population descended from stars of low to intermediate initial mass. The...
Occultation Searches for Kuiper Belt Objects (2003)
Cooray, Asantha, Farmer, Alison J.
The occultation of background stellar sources by foreground Kuiper Belt Objects (KBOs) can be used to survey physical properties of the KBO population. We discuss statistics related to a KBO...