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Sub-Arcsecond Mid-Infrared Observations of NGC 6240: Limitations of AGN-Starburst Power Diagnostics
E. Egami, G. Neugebauer, B. T. Soifer +3
In order to examine the relative importance of powerful starbursts and Compton-thick AGNs in NGC 6240, we have obtained mid-infrared images and low-resolution spectra of the galaxy…
High Spectral Resolution Observations of the Massive Stars in the Galactic Center
Angelle Tanner, Donald F. Figer, Paco Najarro +10
We present high-resolution near-infrared spectra, obtained with the NIRSPEC spectrograph on the W. M. Keck II Telescope, of a collection of hot, massive stars within the central 25…
Low Mass Companions to White Dwarfs
J. Farihi, B. Zuckerman, E. E. Becklin
This paper summarizes the results of over 17 years of work searching for low mass stellar and substellar companions to more than 370 nearby white dwarfs. Roughly 60 low mass, unevo…
A Dusty Disk Around GD 362, a White Dwarf With a Uniquely High Photospheric Metal Abundance
E. E. Becklin, J. Farihi, M. Jura +3
Eighteen years after an infrared excess was discovered associated with the white dwarf G29-38, we report ground-based measurements (JHKL'N') with mJy-level sensitivity of GD 362 th…
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…
IRS 16SW - A New Comoving Group of Young Stars in the Central Parsec of the Milky Way
J. R. Lu, A. M. Ghez, S. D. Hornstein +2
One of the most perplexing problems associated with the supermassive black hole at the center of our Galaxy is the origin of the young stars in its close vicinity. Using proper mot…