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15 papers · 1 filter
First Keck Nulling Observations of a Young Stellar Object: Probing the Circumstellar Environment of the Herbig Ae star MWC 325
S. Ragland, K. Ohnaka, L. Hillenbrand +8
We present the first N-band nulling plus K- and L-band V2 observations of a young stellar object, MWC325, taken with the 85 m baseline Keck Interferometer. The Keck nuller was desi…
The Low-Mass Companion to the Lithium-Depleted, Spectroscopic Binary HBC 425 (St 34)
S. E. Dahm, J. E. Lyke
We present high angular resolution, near-infrared imaging and spectroscopy of a low-mass companion to the lithium-depleted, double-line spectroscopic binary HBC 425 (St 34) obtaine…
A Correlation Between Circumstellar Disks and Rotation in the Upper Scorpius OB Association
S. E. Dahm, Catherine L. Slesnick, R. J. White
We present projected rotational velocities for 20 early-type (B8-A9) and 74 late-type (F2-M8) members of the ~5 Myr old Upper Scorpius OB Association derived from high dispersion o…
The Young Cluster in IC 1274
S. E. Dahm, G. H. Herbig, Brendan P. Bowler
IC 1274 is a faintly luminous nebula lying on the near surface of the Lynds 227 (L227) molecular cloud. Four luminous, early-type (B0-B5) stars are located within a spherical volum…
The 2MASS Redshift Survey - Description and Data Release
John P. Huchra, Lucas M. Macri, Karen L. Masters +17
We present the results of the 2MASS Redshift Survey (2MRS), a ten-year project to map the full three-dimensional distribution of galaxies in the nearby Universe. The 2 Micron All-S…
Spectroscopy of Luminous Compact Blue Galaxies in Distant Clusters I. Spectroscopic Data
S. M. Crawford, G. D. Wirth, M. A. Bershady +1
We used the DEIMOS spectrograph on the Keck II Telescope to obtain spectra of galaxies in the fields of five distant, rich galaxy clusters over the redshift range 0.5 < z < 0.9 in…