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Assessing the C/O Ratio Formation Diagnostic: A Potential Trend with Companion Mass
Kielan K. W. Hoch, Quinn M. Konopacky, Christopher A. Theissen +6
The carbon-to-oxygen (C/O) ratio in an exoplanet atmosphere has been suggested as a potential diagnostic of planet formation. Now that a number of exoplanets have measured C/O rati…
Estimating effective wind speed from Gemini Planet Imager's adaptive optics data using covariance maps
Daniel M. Levinstein, Saavidra Perera, Quinn M. Konopacky +4
The Earth's turbulent atmosphere results in speckled and blurred images of astronomical objects when observed by ground based visible and near-infrared telescopes. Adaptive optics…
A low-mass companion desert among intermediate-mass visual binaries: The scaled-up counterpart to the brown dwarf desert
G. Duchene, J. T. Oon, R. J. De Rosa +8
We present a high-contrast imaging survey of intermediate-mass (1.75--4.5 ) stars to search for the most extreme stellar binaries, i.e., for the lowest mass stellar compan…
Deep orbital search for additional planets in the HR 8799 system
William Thompson, Christian Marois, Clarissa R. Do Ó +6
The HR 8799 system hosts four massive planets orbiting 15 and 80 AU. Studies of the system's orbital stability and its outer debris disk open the possibility of additional planets,…
GPI 2.0: Optical Designs for the Upgrade of the Gemini Planet Imager Coronagraphic system
Meiji M. Nguyen, Bryony F. Nickson, Emiel H. Por +7
The Gemini Planet Imager (GPI) is an integral field spectrograph (IFS) and coronagraph that is one of the few current generation instruments optimized for high-contrast direct imag…
GPI 2.0: Characterizing Self-Luminous Exoplanets Through Low-Resolution Infrared Spectroscopy
Arlene Aleman, Bruce Macintosh, Mary Anne Limbach +4
Direct imaging characterization of extrasolar planets is often done at low spectral resolution. We model the spectrograph for the Gemini Planet Imager upgrade (GPI 2.0) and assess…