Ariel Graykowski and David Jewitt 2018 AJ 155 184
An optical color survey of 43 irregular satellites of our outer planets reveals a depletion of ultrared matter, though it’s abundant in the Kuiper Belt and Centaur populations. This hints at the populations’ different origins.
Ravi Kumar Kopparapu et al 2018 ApJ 856 122
A new classification scheme organizes exoplanets into different categories based on their size and incident stellar flux. These categories are then used to predict exoplanet yields for future direct imaging missions.
Natasha E. Batalha et al 2018 ApJL 856 L34
JWST has the potential to detect the dominant absorbing gas in the atmospheres of temperate terrestrial planets by the 10th transit using transmission spectroscopy techniques in the near-infrared.
A. M. Meisner et al 2018 AJ 155 166
The deepest and widest-area WISE search for Planet Nine to date — covering more than 75% of the sky and incorporating 4 years of WISE observations spanning a 7-year period — found no indication of Planet Nine.
Qiang Wei et al 2018 ApJL 856 L14
Numerical simulations demonstrate that craters can be removed by viscous relaxation of nitrogen ice in Sputnik Planitia on relatively short timescales — thus explaining the young surface observed here by New Horizon.
Shiho Tsujimoto et al 2018 ApJ 856 91
Five expanding shells have been detected in the l = -1.2° region of the galactic center, indicating the region may be a molecular bubble associated with an embedded massive star cluster.