The Galactic Center: A Laboratory for Fundamental Astrophysics and Galactic Nuclei (2009)
Ghez, A., Morris, M., Lu, J., Weinberg, N., Matthews, K., Alexander, T., ...
As the closest example of a galactic nucleus, the Galactic center presents an exquisite laboratory for learning about supermassive black holes (SMBH) and their environs. Detailed studies of stellar...
HDE 245059: A Weak-Lined T Tauri Binary Revealed by Chandra and Keck (2009)
Saavedra, C. Baldovin, Audard, M., Duchêne, G., Güdel, M., Skinner, S. L., Paerels, F. B. S., ...
We present the Chandra High Energy Transmission Grating Spectrometer (HETGS) and Keck observations of HDE 245059, a young weak-lined T Tauri star (WTTS), member of the pre-main sequence group in the...
A power-law break in the near-infrared power spectrum of the Galactic center black hole (2009)
Meyer, L., Do, T., Ghez, A., Morris, M. R., Yelda, S., Schoedel, R., ...
Proposed scaling relations of a characteristic timescale in the X-ray power spectral density of galactic and supermassive black holes have been used to argue that the accretion process is the same...
A 600 minute near-infrared lightcurve of Sagittarius A* (2008)
Meyer, L., Do, T., Ghez, A., Morris, M. R., Witzel, G., Eckart, A., ...
We present the longest, by a factor of two, near-infrared lightcurve from Sgr A* - the supermassive black hole in the Galactic center. Achieved by combining Keck and VLT data from one common night,...
Follow-up observations of binary ultra-cool dwarfs (2008)
Bouy, H., Martin, E. L., Brandner, W., Forveille, T., Delfosse, X., Huelamo, N., ...
Astrometric observations of resolved binaries provide estimates of orbital periods and will eventually lead to measurement of dynamical masses. Only a few very low mass star and brown dwarf masses...
Follow-up observations of binary ultra-cool dwarfs (2008)
Bouy, H., Martín, E. L., Brandner, W., Forveille, T., Delfosse, X., Huélamo, N., ...
Context: Astrometric observations of resolved binaries provide estimates of orbital periods and will eventually lead to measurement of dynamical masses. Only a few very low mass star and brown dwarf...
Follow-up observations of binary ultra-cool dwarfs (2008)
Bouy, H., Martín, E. L., Brandner, W., Forveille, T., Delfosse, X., Huélamo, N., ...
Context. Astrometric observations of resolved binaries provide estimates of orbital periods and will eventually lead to measurement of dynamical masses. Only a few very low mass star and brown dwarf...
Diffraction-limited K-band imaging at the Multiple Mirror Telescope with adaptive optics (2007)
M. Lloyd-hart, D. Colucci, D. Wittman, B. Mcleod, A. Ghez, ...
Low spatial frequencies of atmospheric turbulence are specially troublesome to astronomers because the phase distortions they cause have large amplitude. We have begun experiments at the Multiple...
Diffraction-limited K-band imaging at the Multiple Mirror Telescope with adaptive optics (2007)
Lloyd-Hart Colucci, M. Lloyd-hart, D. Colucci, D. Wittman, B. Mcleod, A. Ghez, ...
Low spatial frequencies of atmospheric turbulence are specially troublesome to astronomers because the phase distortions they cause have large amplitude. We have begun experiments at the Multiple...
A contemporaneous infrared flash from a long gamma-ray burst: an echo from the central engine (2005)
Blake, C. H., Bloom, J. S., Starr, D. L., Falco, E. E., Skrutskie, M., Fenimore, E. E., ...
The explosion that results in a cosmic gamma-ray burst (GRB) is thought to produce emission from two physical processes -- the activity of the central engine gives rise to the high-energy emission of...
First determination of the orbit of a binary L-dwarf (2005)
Bouy, H., Duchêne, G., Köhler, R., Brandner, W., Bouvier, J., Martin, E., ...
An Overabundance of Transient X-ray Binaries within 1 pc of the Galactic Center (2004)
Muno, M. P., Pfahl, E., Baganoff, F. K., Brandt, W. N., Ghez, A., Lu, J., ...
During five years of Chandra observations, we have identified seven X-ray transients located within 23 pc of Sgr A*. These sources each vary in luminosity by more than a factor of 10, and have peak...
First determination of the dynamical mass of a binary L dwarf (2004)
Bouy, H., Duchene, G., Koehler, R., Brandner, W., Bouvier, J., Martin, E. L., ...
We present here the results of astrometric, photometric and spectroscopic observations leading to the determination of the orbit and dynamical masses of the binary L dwarf 2MASSW J0746425+2000321....
Duchene, G., McCabe, C., Ghez, A., Macintosh, B.
We present the first 3.8 micron image of the dusty ring surrounding the young binary system GG Tau, obtained with the W. M. Keck II 10m telescope's adaptive optics system. This is the longest...
First determination of the dynamical mass of a binary L dwarf (2004)
Bouy, H., Duchêne, G., Köhler, R., Brandner, W., Bouvier, J., Martin, E. L., ...
First determination of the dynamical mass of a binary L dwarf (2004)
Bouy, H., Duchêne, G., Köhler, R., Brandner, W., Bouvier, J., Martín, E. L., ...
We present here the results of astrometric, photometric and spectroscopic observations leading to the determination of the orbit and dynamical masses of the binary L dwarf 2MASSW J0746425+2000321....
The Accelerations of Stars Orbiting the Milky Way's Central Black Hole (2000)
Ghez, A., Morris, M., Becklin, E. E., Kremenek, T., Tanner, A.
Recent measurements, of the velocities of stars near the center of the Milky Way have provided the strongest evidence for the presence of a supermassive black hole in a galaxy, but the observational...