B. Oppenheimer

Publications143
h-index41
Citations5,868
Highly Influential Citations392
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The Gemini Deep Planet Survey
We present the results of the Gemini Deep Planet Survey, a near-infrared adaptive optics search for giant planets and brown dwarfs around 85 nearby young stars. The observations were obtained with… Expand
Discovery of a cool brown dwarf
TLDR
The discovery of a probable companion to the nearby star G1229, with no more than onetenth the luminosity of the least luminous hydro-gen-burning star, is reported, concluding that the companion is a brown dwarf with a temperature of less than 1,200 K, and a mass ∼20–50 times that of Jupiter. Expand
Direct Detection of Galactic Halo Dark Matter
TLDR
A survey to find faint, cool white dwarfs with large space velocities, indicative of their membership in the galaxy's spherical halo component reveals a substantial, directly observed population of oldwhite dwarfs, too faint to be seen in previous surveys, and represents a direct detection of galactic halo dark matter. Expand
First light of the Gemini Planet Imager
TLDR
Observations ofBeta Pictoris clearly detect the planet, Beta Pictoris b, in a single 60-s exposure with minimal postprocessing, and fitting the Keplerian orbit of Beta Pic b using the new position together with previous astrometry gives a factor of 3 improvement in most parameters over previous solutions. Expand
The Spectrum of the Brown Dwarf Gliese 229B
We present a spectrum of the cool K) brown dwarf Gliese 229B. This spectrum, with a (T eff \ 900 relatively high signal-to-noise ratio per spectral resolution element spans the wavelength range… Expand
A search for J-band variability from late-L and T brown dwarfs
We present J-band photometric observations of eight late-L and T type brown dwarfs designed to search for variability. We detect small amplitude periodic variability from three of the objects on… Expand
The Gemini Planet Imager: from science to design to construction
The Gemini Planet Imager (GPI) is a facility instrument under construction for the 8-m Gemini South telescope. It combines a 1500 subaperture AO system using a MEMS deformable mirror, an… Expand
Observations of Ultracool White Dwarfs
We present new spectroscopic and photometric measurements of the white dwarfs LHS 3250 and WD 0346+246. Along with F351-50, these white dwarfs are the coolest ones known, all with effective… Expand
SPECTRAL ENERGY DISTRIBUTION AND BOLOMETRIC LUMINOSITY OF THE COOL BROWN DWARF GLIESE 229B
Infrared broadband photometry of the cool brown dwarf Gliese 229B extending in wavelength from 0.8 to 10.5 micron is reported. These results are derived from both new data and reanalyzed, previously… Expand
Tests of the accelerating Universe with near-infrared observations of a high-redshift type Ia supernova
We have measured the rest-frame B-, V -, and I-band light curves of a high-redshift type Ia supernova (SN Ia), SN 1999Q (z \ 0.46), using the Hubble Space Telescope (HST ) and ground-based… Expand
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