Modeling Porous Dust Grains with Ballistic Aggregates. II. Light Scattering Properties (2009)
Shen, Yue, Draine, B. T., Johnson, Eric T.
We study the light scattering properties of random ballistic aggregates constructed in Shen et al. (Paper I). Using the discrete-dipole-approximation, we compute the scattering phase function and...
Modeling Porous Dust Grains with Ballistic Aggregates I: Geometry and Optical Properties (2008)
Shen, Yue, Draine, B. T., Johnson, Eric T.
We investigate the scattering and absorption of light by random ballistic aggregates of spherical monomers. We present a general measure for the porosity of an irregular particle. Three different...
Cassini States with Dissipation: Why Obliquity Tides Cannot Inflate Hot Jupiters (2007)
Fabrycky, Daniel C., Johnson, Eric T., Goodman, Jeremy
Some short-period exoplanets (hot Jupiters) are observed by their transits to have anomalously large radii. It has been suggested that these planets are in a resonance involving persistent...
Diffusive Migration of Low-Mass Proto-planets in Turbulent Disks (2006)
Johnson, Eric T., Goodman, Jeremy, Menou, Kristen
Torque fluctuations due to magnetorotational turbulence in proto-planetary disks may greatly influence the migration patterns and survival probabilities of nascent planets. Provided that the...
SDSS J0903+5028: A New Gravitational Lens (2003)
Johnston, David E., Richards, Gordon T., Frieman, Joshua A., Keeton, Charles R., Strauss, Michael A., Becker, Robert H., ...
We report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J090334.92+502819.2. This object was targeted for SDSS spectroscopy as a Luminous Red Galaxy...