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Modeling the Infrared Emission from the HR 4796A Disk
Aigen Li, J. I. Lunine
We model the spectral energy distribution (SED) from the mid-infrared to submillimeter of the ring-like disk of HR 4796A, the dustiest A-type star. We consider dust made either of…
Modeling the Infrared Emission from the HD 141569A Disk
Aigen Li, J. I. Lunine
We model the infrared (IR) emission from the double-ring disk of HD 141569A, using a porous dust model that was previously shown successful in reproducing the spectral energy distr…
Interaction of Nanoparticles with Radiation
Aigen Li
Interstellar grains span a wide range of sizes from a few angstroms to a few micrometers. The presence of nanometer-sized or smaller particles in the interstellar medium is indicat…
A Search for Sodium Absorption from Comets Around HD209458
Caylin Mendelowitz, Jian Ge, Avi M. Mandell +1
We monitored the planet-bearing solar-type star HD209458 for sodium absorption in the region of the stellar NaI D1 line that would be indicative of cometary activity in the system.…