8 papers
The Search for Brown Dwarfs around White Dwarfs
J. Farihi, E. E. Becklin, B. Zuckerman
The infrared search for substellar companions to nearby white dwarfs has been going for a little more than a decade. The most recent phase has been a wide field proper motion searc…
GD248B, The Coolest Known Helium Atmosphere White Dwarf
J. Farihi, E. E. Becklin, B. Zuckerman
This is to notify colleagues that our ApJ paper and corresponding astro-ph version are being withdrawn. Optical spectroscopy obtained with a 3m class telescope gave no indication o…
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…
Finding Brown Dwarf Companions with HST/NICMOS
P. J. Lowrance, E. E. Becklin, G. Schneider +2
We present the results of a HST/NICMOS coronagraphic survey for the direct detection of substellar companions within the young TW Hydrae and Tucana Associations. At the distance of…
Dust to Dust: Evidence for Planet Formation?
G. Schneider, D. C. Hines, M. D. Silverstone +3
We discuss the properties of several circumstellar debris disk systems imaged with the Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer in a survey of yo…
K-Band Spectroscopy of an Obscured Massive Stellar Cluster in the Antennae Galaxies (NGC 4038/4039) with NIRSPEC
A. M. Gilbert, J. R. Graham, I. S. McLean +6
We present infrared spectroscopy of the Antennae Galaxies (NGC 4038/4039) with NIRSPEC at the W. M. Keck Observatory. We imaged the star clusters in the vicinity of the southern nu…