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Evolution of Mid-IR Excess Around Sun-like Stars: Constraints on Models of Terrestrial Planet Formation
M. R. Meyer, J. M. Carpenter, E. E. Mamajek +11
We report observations from the Spitzer Space Telescope (SST) regarding the frequency of 24 micron excess emission toward sun-like stars. Our unbiased sample is comprised of 309 st…
A Survey for Massive Giant Planets in Debris Disks with Evacuated Inner Cavities
D. Apai, M. Janson, A. Moro-Martin +9
The commonality of collisionally replenished debris around main sequence stars suggests that minor bodies are frequent around Sun-like stars. Whether or not debris disks in general…
An Improbable Solution to the Underluminosity of 2M1207B: A Hot Protoplanet Collision Afterglow
Eric E. Mamajek, Michael R. Meyer
We introduce an alternative hypothesis to explain the very low luminosity of the cool (L-type) companion to the ~25 M_Jup ~8 Myr-old brown dwarf 2M1207A. Recently, Mohanty et al. (…
On the Distance to the Ophiuchus Star-Forming Region
Eric E. Mamajek
The Ophiuchus molecular cloud complex has produced in Lynds 1688 the richest known embedded cluster within ~300 pc of the Sun. Unfortunately, distance estimates to the Oph complex…
An Imaging Survey for Extrasolar Planets around 45 Close, Young Stars with SDI at the VLT and MMT
Beth A. Biller, Laird M. Close, Elena Masciadri +11
We present the results of a survey of 45 young (<250 Myr), close (<50 pc) stars with the Simultaneous Differential Imager (SDI) implemented at the VLT and the MMT for the direct de…
A Splinter Session on the Thorny Problem of Stellar Ages
Eric E. Mamajek, David Barrado y Navascues, Sofia Randich +4
Accurate stellar ages remain one of the most poorly constrained, but most desired, astronomical quantities. Here we briefly summarize some recent efforts to improve the stellar age…