4 papers
Can AB Dor C be a Tight Binary Brown Dwarf?
C. Marois, B. Macintosh, I. Song +1
AB Dor C, a low-mass companion to the young star AB Dor A has recently been imaged. Direct detection and astrometric observations have been used to solve the AB Dor C orbit and obt…
Speckle Decorrelation and Dynamic Range in Speckle Noise Limited Imaging
Anand Sivaramakrishnan, James P. Lloyd, Philip E. Hodge +1
The useful dynamic range of an image in the diffraction limited regime is usually limited by speckles caused by residual phase errors in the optical system forming the image. The t…
Keck adaptive optics observations of TW Hydrae Association members
Bruce Macintosh, Claire Max, Ben Zuckerman +7
Adaptive optics (AO) on 8-10 m telescopes is an enormously powerful tool for studying young nearby stars. It is especially useful for searching for companions. Using AO on the 10-m…
An Adaptive Optics Survey for Companions to Stars with Extra-Solar Planets
J. P. Lloyd, M. C. Liu, J. R. Graham +12
We have undertaken an adaptive optics (AO) imaging survey of extrasolar planetary systems and stars showing interesting radial velocity trends from high precision radial velocity s…