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5 papers · 2 filters
Ruling out Stellar Companions and Resolving the Innermost Regions of Transitional Disks with the Keck Interferometer
Jorg-Uwe Pott, Marshall D. Perrin, Elise Furlan +3
With the Keck Interferometer, we have studied at 2 um the innermost regions of several nearby, young, dust depleted "transitional" disks. Our observations target five of the six cl…
The peculiar solar composition and its possible relation to planet formation
Jorge Melendez, Martin Asplund, Bengt Gustafsson +1
We have conducted a differential elemental abundance analysis of unprecedented accuracy (0.01 dex) of the Sun relative to 11 solar twins from the Hipparcos catalogue and 10 solar a…
First L-band Interferometric Observations of a Young Stellar Object: Probing the Circumstellar Environment of MWC 419
S. Ragland, R. L. Akeson, T. Armandroff +7
We present spatially-resolved K- and L-band spectra (at spectral resolution R = 230 and R = 60, respectively) of MWC 419, a Herbig Ae/Be star. The data were obtained simultaneously…
Mid-infrared size survey of Young Stellar Objects: Description of Keck segment-tilting experiment and basic results
J. D. Monnier, P. G. Tuthill, M. Ireland +3
The mid-infrared properties of pre-planetary disks are sensitive to the temperature and flaring profiles of disks for the regions where planet formation is expected to occur. In or…
Spitzer Spectroscopy of Circumstellar Disks in the 5 Myr Old Upper Scorpius OB Association
S. E. Dahm, John M. Carpenter
We present mid-infrared spectra between 5.2 and 38 microns for 26 disk-bearing members of the ~5 Myr old Upper Scorpius OB association obtained with the Infrared Spectrograph onboa…