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An Upper Mass Limit on a Red Supergiant Progenitor for the Type II-Plateau Supernova SN 2006my
Douglas C. Leonard, Avishay Gal-Yam, Derek B. Fox +5
We analyze two pre-supernova (SN) and three post-SN high-resolution images of the site of the Type II-Plateau supernova SN 2006my in an effort to either detect the progenitor star…
GRB 071003: Broadband Follow-up Observations of a Very Bright Gamma-Ray Burst in a Galactic Halo
D. A. Perley, W. Li, R. Chornock +26
The optical afterglow of long-duration GRB 071003 is among the brightest yet to be detected from any GRB, with R ~ 12 mag in KAIT observations starting 42 s after the GRB trigger,…
Resolving the Multiple Outflows in the Egg Nebula with Keck II Laser Guide Star Adaptive Optics
D. Le Mignant, R. Sahai, A. Bouchez +10
The Egg Nebula has been regarded as the archetype of bipolar proto-planetary nebulae, yet we lack a coherent model that can explain the morphology and kinematics of the nebular and…
The Wide Brown Dwarf Binary Oph 1622-2405 and Discovery of A Wide, Low Mass Binary in Ophiuchus (Oph 1623-2402): A New Class of Young Evaporating Wide Binaries?
Laird M. Close, Ben Zuckerman, Inseok Song +10
We imaged five objects near the star forming clouds of Ophiuchus with the Keck Laser Guide Star AO system. We resolved Allers et al. (2006)'s #11 (Oph 16222-2405) and #16 (Oph 1623…
Keck Interferometer Observations of FU Orionis Objects
R. Millan-Gabet, J. D. Monnier, R. L. Akeson +31
We present new K-band long baseline interferometer observations of three young stellar objects of the FU Orionis class, V1057 Cyg, V1515 Cyg and Z CMa-SE, obtained at the Keck Inte…
The dusty AGB star RS CrB: first mid-infrared interferometric observations with the Keck Telescopes
B. Mennesson, C. Koresko, M. J. Creech-Eakman +2
We report interferometric observations of the semi-regular variable star RS CrB, a red giant with strong silicate emission features. The data were among the first long baseline mid…
The First Laser Guide Star Adaptive Optics Observations of the Galactic Center: Sgr A*'s Infrared Color and the Extended Red Emission in its Vicinity
A. M. Ghez, S. D. Hornstein, J. Lu +14
(Abridged) We present the first Laser Guide Star Adaptive Optics (LGS-AO) observations of the Galactic center. LGS-AO has dramatically improved the quality, robustness, and versati…
The near-infrared size-luminosity relations for Herbig Ae/Be disks
J. D. Monnier, R. Millan-Gabet, R. Billmeier +31
We report the results of a sensitive K-band survey of Herbig Ae/Be disk sizes using the 85-m baseline Keck Interferometer. Targets were chosen to span the maximum range of stellar…
The Team Keck Treasury Redshift Survey of the GOODS-North Field
Gregory D. Wirth, Christopher N. A. Willmer, Paola Amico +19
We report the results of an extensive imaging and spectroscopic survey in the GOODS-North field completed using DEIMOS on the Keck II telescope. Observations of 2018 targets in a m…
Variable Infrared Emission from the Supermassive Black Hole at the Center of the Milky Way
A. M. Ghez, S. A. Wright, K. Matthews +7
We report the detection of a variable point source, imaged at L'(3.8 microns) with the W. M. Keck II 10-meter telescope's adaptive optics system, that is coincident to within 18 ma…
Interferometer Observations of Subparsec-scale Infrared Emission in the Nucleus of NGC 4151
M. Swain, G. Vasisht, R. Akeson +22
We report novel, high-angular resolution interferometric measurements that imply the near-infrared nuclear emission in NGC 4151 is unexpectedly compact. We have observed the nucleu…