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Detection of CI in absorption towards PKS 1830-211 with the eSMA
Sandrine Bottinelli, A. Meredith Hughes, Ewine F. van Dishoeck +10
We report the first science observations and results obtained with the "extended" SMA (eSMA), which is composed of the SMA (Submillimeter Array), JCMT (James Clerk Maxwell Telescop…
The eSMA: description and first results
Sandrine Bottinelli, Ken H. Young, Richard Chamberlin +15
The eSMA ("extended SMA") combines the SMA, JCMT and CSO into a single facility, providing enhanced sensitivity and spatial resolution owing to the increased collecting area at the…
The Structure of the DoAr 25 Circumstellar Disk
Sean M. Andrews, A. M. Hughes, D. J. Wilner +1
We present high spatial resolution (< 0.3" = 40$ AU) Submillimeter Array observations of the 865 micron continuum emission from the circumstellar disk around the young star DoAr 25…
A Resolved Molecular Gas Disk around the Nearby A Star 49 Ceti
A. M. Hughes, D. J. Wilner, I. Kamp +1
The A star 49 Ceti, at a distance of 61 pc, is unusual in retaining a substantial quantity of molecular gas while exhibiting dust properties similar to those of a debris disk. We p…
Gas and Dust Emission at the Outer Edge of Protoplanetary Disks
A. M. Hughes, D. J. Wilner, C. Qi +1
We investigate the apparent discrepancy between gas and dust outer radii derived from millimeter observations of protoplanetary disks. Using 230 and 345 GHz continuum and CO J=3-2…
An Inner Hole in the Disk around TW Hydrae Resolved in 7 Millimeter Dust Emission
A. M. Hughes, D. J. Wilner, N. Calvet +3
We present Very Large Array observations at 7 millimeters wavelength that resolve the dust emission structure in the disk around the young star TW Hydrae at the scale of the ~4 AU…