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Trends in Silicates in the Pictoris Disk
Cicero X. Lu, Christine H. Chen, B. A. Sargent +14
While beta Pic is known to host silicates in ring-like structures, whether the properties of these silicate dust vary with stellocentric distance remains an open question. We re-an…
IRS Spectra of Debris Disks in the Scorpius-Centaurus OB Association
Hannah Jang-Condell, Christine H. Chen, Tushar Mittal +5
We analyze Spitzer IRS spectra of 110 B-, A-, F-, and G-type stars with optically thin infrared excess in the Scorpius-Centaurus (ScoCen) OB association. The age of these stars ran…
Curved walls: Grain growth, settling, and composition patterns in T Tauri disk dust sublimation fronts
M. K. McClure, P. D'Alessio, N. Calvet +6
The dust sublimation walls of disks around T Tauri stars represent a directly observable cross-section through the disk atmosphere and midplane. Their emission properties can probe…
Solar System Analogs Around IRAS-Discovered Debris Disks
Christine H. Chen, Patrick Sheehan, Dan M. Watson +2
We have rereduced Spitzer IRS spectra and reanalyzed the SED's of three nearby debris disks: lambda Boo, HD 139664, and HR 8799. We find that that the thermal emission from these o…