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Rayleigh Scattering in the Atmosphere of the Warm Exo-Neptune GJ 3470b
Diana Dragomir, Björn Benneke, Kyle A. Pearson +4
GJ 3470b is a warm Neptune-size planet transiting a M dwarf star. Like the handful of other small exoplanets for which transmission spectroscopy has been obtained, GJ 3470b exhibit…
Eleven Multi-planet Systems from K2 Campaigns 1 & 2 and the Masses of Two Hot Super-Earths
Evan Sinukoff, Andrew W. Howard, Erik A. Petigura +14
We present a catalog of 11 multi-planet systems from Campaigns 1 and 2 of the K2 mission. We report the sizes and orbits of 26 planets split between seven 2-planet systems and four…
Two Transiting Low Density Sub-Saturns from K2
Erik A. Petigura, Andrew W. Howard, Eric D. Lopez +11
We report the discovery and confirmation of two sub-Saturn planets orbiting a bright (V = 11.3), metal-rich ([Fe/H] = 0.42 0.04 dex) G3 dwarf in the K2 Campaign 2 field. The…
Variability in a Young, L/T Transition Planetary-Mass Object
Beth A. Biller, Johanna Vos, Mariangela Bonavita +15
As part of our ongoing NTT SoFI survey for variability in young free-floating planets and low mass brown dwarfs, we detect significant variability in the young, free-floating plane…
Cloud Structure of the Nearest Brown Dwarfs II: High-amplitude variability for Luhman 16 A and B in and out of the 0.99 micron FeH feature
Esther Buenzli, Mark. S. Marley, Dániel Apai +4
The re-emergence of the 0.99 m FeH feature in brown dwarfs of early- to mid-T spectral type has been suggested as evidence for cloud disruption where flux from deep, hot regions…
Observations of Exoplanet Atmospheres
Ian J. M. Crossfield
Detailed characterization of an extrasolar planet's atmosphere provides the best hope for distinguishing the makeup of its outer layers, and the only hope for understanding the int…