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ALMA Thermal Observations of a Proposed Plume Source Region on Europa
Samantha K. Trumbo, Michael E. Brown, Bryan J. Butler
We present a daytime thermal image of Europa taken with the Atacama Large Millimeter Array. The imaged region includes the area northwest of Pwyll Crater, which is associated with…
m spectra of Hilda asteroids
Ian Wong, Michael E. Brown, Joshua P. Emery
The Hilda asteroids are primitive bodies in resonance with Jupiter whose origin and physical properties are not well understood. Current models posit that these asteroids formed in…
Observational bias and the clustering of distant eccentric Kuiper belt objects
Michael E. Brown
The hypothesis that a massive Planet Nine exists in the outer solar system on a distant eccentric orbit was inspired by observations showing that the objects with the most distant…
A New Spectral Feature on the Trailing Hemisphere of Europa at 3.78 microns
Samantha K. Trumbo, Michael E. Brown, Patrick D. Fischer +1
We present hemispherically resolved spectra of the surface of Europa from ~3.1--4.13 microns, which we obtained using the near infrared spectrometer NIRSPEC on the Keck II telescop…
The density of mid-sized Kuiper belt objects from ALMA thermal observations
Michael E. Brown, Bryan J. Butler
The densities of mid-sized Kuiper belt objects are a key constraint into understanding the assembly of objects in the outer solar system. These objects are critical for understandi…
The bimodal color distribution of small Kuiper Belt objects
Ian Wong, Michael E. Brown
We conducted a two-night photometric survey of small Kuiper Belt objects (KBOs) near opposition using the wide-field Hyper Suprime-Cam instrument on the 8.2 m Subaru Telescope. The…