279 citations · 896 across the 8 of their papers we have counts for
8 papers
Unsupervised Learning for Target Tracking and Background Subtraction in Satellite Imagery
Jonathan S. Kent, Charles C. Wamsley, Davin Flateau +1
This paper describes an unsupervised machine learning methodology capable of target tracking and background suppression via a novel dual-model approach. ``Jekyll`` produces a video…
: Pressure-dependent Changes In Light Curve Phase In Brown Dwarfs From Simultaneous and Observations
Hao Yang, Dániel Apai, Mark S. Marley +9
We present /IRAC Ch1 and Ch2 monitoring of six brown dwarfs during 8 different epochs over the course of 20 months. For four brown dwarfs, we also obtained simulataneous $…
Weather on Other Worlds. II. Survey Results: Spots Are Ubiquitous on L and T Dwarfs
Stanimir Metchev, Aren Heinze, Dániel Apai +7
We present results from the "Weather on Other Worlds" Spitzer Exploration Science program to investigate photometric variability in L and T dwarfs, usually attributed to patchy clo…
HST Rotational Spectral Mapping of Two L-Type Brown Dwarfs: Variability In and Out of Water Bands Indicates High-Altitude Haze Layers
Hao Yang, Daniel Apai, Mark S. Marley +13
We present time-resolved near-infrared spectroscopy of two L5 dwarfs, 2MASS J18212815+1414010 and 2MASS J15074759-1627386, observed with the Wide Field Camera 3 instrument on the H…
Brown Dwarf Photospheres are Patchy: A Hubble Space Telescope Near-infrared Spectroscopic Survey Finds Frequent Low-level Variability
Esther Buenzli, Daniel Apai, Jacqueline Radigan +2
Condensate clouds strongly impact the spectra of brown dwarfs and exoplanets. Recent discoveries of variable L/T transition dwarfs argued for patchy clouds in at least some ultraco…
Weather on Other Worlds I: Detection of Periodic Variability in the L3 Dwarf DENIS-P J1058.7-1548 with Precise Multi-Wavelength Photometry
Aren N. Heinze, Stanimir Metchev, Daniel Apai +7
Photometric monitoring from warm Spitzer reveals that the L3 dwarf DENIS-P J1058.7-1548 varies sinusoidally in brightness with a period of 4.25 +0.26/-0.16 hours and an amplitude o…
Vertical Atmospheric Structure in a Variable Brown Dwarf: Pressure-dependent Phase Shifts in Simultaneous Hubble Space Telescope-Spitzer Light Curves
Esther Buenzli, Daniel Apai, Caroline V. Morley +6
Heterogeneous clouds or temperature perturbations in rotating brown dwarfs produce variability in the observed flux. We report time-resolved simultaneous observations of the variab…
Abundances of Stars with Planets: Trends with Condensation Temperature
Simon C. Schuler, Davin Flateau, Katia Cunha +3
Precise abundances of 18 elements have been derived for ten stars known to host giant planets from high signal-to-noise ratio, high-resolution echelle spectroscopy. Internal uncert…