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- California Institute of TechnologyUS898 papers
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11 papers · 2 filters
Characterizing microlensing planetary system OGLE-2014-BLG-0676Lb with adaptive optics imaging
Xiao-Jia Xie, Subo Dong, Yossi Shvartzvald +10
We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676Lb using adaptive optics (AO) images taken by the Magellan and Keck telescopes. We measure the flux of…
GJ 367b: A dense ultra-short period sub-Earth planet transiting a nearby red dwarf star
Kristine W. F. Lam, Szilárd Csizmadia, Nicola Astudillo-Defru +75
Ultra-short-period (USP) exoplanets have orbital periods shorter than one day. Precise masses and radii of USPs could provide constraints on their unknown formation and evolution p…
Keck/OSIRIS Pa high-contrast imaging and updated constraints on PDS~70b
Taichi Uyama, Chen Xie, Yuhiko Aoyama +11
We present a high-contrast imaging search for Pa line emission from protoplanets in the PDS~70 system with Keck/OSIRIS integral field spectroscopy. We applied the high-resolutio…
Volatility of Sodium in Carbonaceous Chondrites at Temperatures Consistent with Low-Perihelia Asteroids
Joseph R. Masiero, Björn J. R. Davidsson, Yang Liu +2
Solar system bodies with surface and sub-surface volatiles will show observational evidence of activity when they reach a temperature where those volatiles change from solid to gas…
Detection and Bulk Properties of the HR 8799 Planets with High Resolution Spectroscopy
Jason J. Wang, Jean-Baptiste Ruffio, Evan Morris +49
Using the Keck Planet Imager and Characterizer (KPIC), we obtained high-resolution (R35,000) -band spectra of the four planets orbiting HR 8799. We clearly detected \water…
The 13O-rich atmosphere of a young accreting super-Jupiter
Yapeng Zhang, Ignas Snellen, Alexander J. Bohn +8
Isotope abundance ratios play an important role in astronomy and planetary sciences, providing insights in the origin and evolution of the Solar System, interstellar chemistry, and…