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Stellar Age Estimation from ~3 Myr to ~3 Gyr
Lynne Hillenbrand, Eric Mamajek, John Stauffer +3
We present recent progress on quantitative estimation of stellar ages using ind icators such as theoretical evolutionary tracks, rotation, rotation-driven chrom ospheric and corona…
Evidence for a Photoevaporated Circumbinary Disk in Orion
M. Robberto, L. Ricci, N. Da Rio +1
We have found a photoevaporated disk in the Orion Nebula that includes a wide binary. HST/ACS observations of the proplyd 124-132 show two point-like sources separated by 0".15, or…
The HST/ACS Atlas of Protoplanetary Disks in the Great Orion Nebula
Luca Ricci, Massimo Robberto, David R. Soderblom
We present the atlas of protoplanetary disks in the Orion Nebula based on the ACS/WFC images obtained for the HST Treasury Program on the Orion Nebula Cluster. The observations hav…
Keck Hires Spectroscopy of Candidate Post T Tauri Stars
Eric J. Bubar, Jeremy R. King, David R. Soderblom +2
We use high-signal-to-noise (150-450), high resolution () Keck HIRES spectroscopy of 13 candidate post T Tauri stars to derive basic physical parameters, lithi…
The Formation and Evolution of Planetary Systems: Placing Our Solar System in Context with Spitzer
Michael R. Meyer, Lynne A. Hillenbrand, Dana Backman +32
We provide an overview of the Spitzer Legacy Program ``Formation and Evolution of Planetary Systems" (FEPS) which was proposed in 2000, begun in 2001, and executed aboard the Spitz…
Calibrating the Solar Dynamo: Magnetic Activity Cycles of Southern Sun-like Stars
T. S. Metcalfe, T. J. Henry, M. Knolker +1
The solar magnetic activity cycle is responsible for periodic episodes of severe space weather, which can perturb satellite orbits, interfere with communications systems, and bring…