853 citations · 13.6k across the 163 of their papers we have counts for
9 papers · 1 filter
Optical Images of an Exosolar Planet 25 Light Years from Earth
Paul Kalas, James R. Graham, Eugene Chiang +6
Fomalhaut is a bright star 7.7 parsecs (25 light years) from Earth that harbors a belt of cold dust with a structure consistent with gravitational sculpting by an orbiting planet.…
Astrometry with the Keck-Interferometer: the ASTRA project and its science
Jorg-Uwe Pott, Julien Woillez, Rachel L. Akeson +22
The sensitivity and astrometry upgrade ASTRA of the Keck Interferometer is introduced. After a brief overview of the underlying interferometric principles, the technology and conce…
Spatially Resolved Spectroscopy of Sub-AU-Sized Regions of T Tauri and Herbig Ae/Be Disks
J. A. Eisner, J. R. Graham, R. L. Akeson +1
We present spatially resolved near-IR spectroscopic observations of 15 young stars. Using a grism spectrometer behind the Keck Interferometer, we obtained an angular resolution of…
High Resolution K-band Spectroscopy of MWC 480 and V1331 Cyg
Joan R. Najita, Greg W. Doppmann, John S. Carr +2
We present high resolution (R=25,000-35,000) K-band spectroscopy of two young stars, MWC 480 and V1331 Cyg. Earlier spectrally dispersed (R=230) interferometric observations of MWC…
CARMA Millimeter-Wave Aperture Synthesis Imaging of the HD 32297 Debris Disk
H. L. Maness, M. P. Fitzgerald, R. Paladini +3
We present the first detection and mapping of the HD 32297 debris disk at 1.3 mm with the Combined Array for Research in Millimeter-wave Astronomy (CARMA). With a sub-arcsecond bea…
Detecting Sound-Wave-Like Surface Brightness Ripples in Cluster Cores
J. Graham, A. C. Fabian, J. S. Sanders
We investigate the observational requirements for the detection of sound-wave-like features in galaxy cluster cores. We calculate the effect of projection on the observed wave ampl…
The IRCAL Polarimeter: Design, Calibration, and Data Reduction for an Adaptive Optics Imaging Polarimeter
Marshall D. Perrin, James R. Graham, James P. Lloyd
We have upgraded IRCAL, the near-infrared science camera of the Lick Observatory adaptive optics system, to add a dual-channel imaging polarimetry mode. This mode uses an optically…
Gas and Dust Associated with the Strange, Isolated, Star BP Piscium
B. Zuckerman, C. Melis, Inseok Song +15
We have carried out a multiwavelength observational campaign demonstrating some of the remarkable properties of the infrared-bright variable star BP Psc. Surrounded by a compact du…
The Weak Shock in the Core of the Perseus Cluster
J. Graham, A. C. Fabian, J. S. Sanders
The dissipation of energy from sound waves and weak shocks is one of the most promising mechanisms for coupling AGN activity to the surrounding intracluster medium (ICM), and so of…