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10 papers · 2 filters
EPIC 219388192 b - an inhabitant of the brown dwarf desert in the Ruprecht 147 open cluster
Grzegorz Nowak, Enric Palle, Davide Gandolfi +32
We report the discovery of EPIC 219388192 b, a transiting brown dwarf in a 5.3-day orbit around a member star of Ruprecht-147, the oldest nearby open cluster association, which was…
Exoplanetary atmospheric sodium revealed by the orbital motion. Narrow-band transmission spectroscopy of HD 189733b with UVES
S. Khalafinejad, C. von Essen, H. J. Hoeijmakers +8
During primary transits, the spectral signatures of an exoplanet atmosphere can be measured using transmission spectroscopy. The goal of this work is to accurately measure the atom…
Measuring stellar granulation during planet transits
A. Chiavassa, A. Caldas, F. Selsis +6
Stellar activity and convection-related surface structures might cause bias in planet detection and characterization that use these transits. Surface convection simulations help to…
Exoplanet Orbital Eccentricities Derived From LAMOST-Kepler Analysis
Ji-Wei Xie, Subo Dong, Zhaohuan Zhu +14
The nearly circular (mean eccentricity <e>~0.06) and coplanar (mean mutual inclination <i>~3 deg) orbits of the Solar System planets motivated Kant and Laplace to put forth the hyp…
The discovery of a planetary candidate around the evolved low-mass Kepler giant star HD 175370
M. Hrudková, A. Hatzes, R. Karjalainen +20
We report on the discovery of a planetary companion candidate with a minimum mass Msini = 4.6 M_J orbiting the K2 III giant star HD 175370 (KIC 007940959). This star was a target i…
The stellar obliquity, planet mass, and very low albedo of Qatar-2 from K2 Photometry
Fei Dai, Joshua N. Winn, Liang Yu +1
The Qatar-2 transiting exoplanet system was recently observed by the {\it Kepler} telescope as part of {\it K2} Campaign 6. The photometric time series has one-minute time sampling…