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Beyond the Cosmic Veil: Star and Planet Formation Research after SIRTF and NGST
Michael R. Meyer
How do planets form from circumstellar disks of gas and dust? What physical processes are responsible for determining the final masses of forming stars and ultimately the initial m…
Evolution of Brown Dwarf Atmospheres: Investigating Physical Parameters from Near-IR Spectra
Nadya Gorlova, Michael R. Meyer, Jim Liebert +1
We obtained near-infrared spectra of a sample of very low mass objects as a function of age in order to investigate the temperature and surface gravity sensitivity of several featu…
Post-T Tauri Stars in the Nearest OB Association
Eric E. Mamajek, Michael R. Meyer, James Liebert
We present results of a spectroscopic survey of X-ray- and proper motion-selected samples of late-type stars in the Lower Cen-Cru (LCC) and Upper Cen-Lup (UCL) subgroups of the nea…
Near-Infrared Photometric Variability of Stars Toward the Chamaeleon I Molecular Cloud
John M. Carpenter, Lynne A. Hillenbrand, M. F. Skrutskie +1
We present the results of a J, H, and K_s photometric monitoring campaign of a 0.72 x 6 sq deg. area centered on the Chamaeleon I star forming region. Data were obtained on 15 sepa…
A disrupted circumstellar torus inside eta Carinae's Homunculus Nebula
Nathan Smith, Robert D. Gehrz, Phillip M. Hinz +4
We present thermal infrared images of the bipolar nebula surrounding eta Carinae at six wavelengths from 4.8 to 24.5 microns. These were obtained with the MIRAC3 camera system at t…