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25 papers · 2 filters
The Mass of Kepler-93b and The Composition of Terrestrial Planets
Courtney D. Dressing, David Charbonneau, Xavier Dumusque +32
Kepler-93b is a 1.478 +/- 0.019 Earth radius planet with a 4.7 day period around a bright (V=10.2), astroseismically-characterized host star with a mass of 0.911+/-0.033 solar mass…
The HARPS search for southern extra-solar planets XXXVI: Five new long-period giant planets and a system update
C. Moutou, G. Lo Curto, M. Mayor +10
We describe radial-velocity time series obtained by HARPS on the 3.60 m telescope in La Silla (ESO, Chile) over ten years and report the discovery of five new giant exoplanets in d…
Characterizing K2 Planet Discoveries: A super-Earth transiting the bright K-dwarf HIP 116454
Andrew Vanderburg, Benjamin T. Montet, John Asher Johnson +43
We report the first planet discovery from the two-wheeled Kepler (K2) mission: HIP 116454 b. The host star HIP 116454 is a bright (V = 10.1, K = 8.0) K1-dwarf with high proper moti…
The HARPS search for southern extra-solar planets XXXV. Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543
N. Astudillo-Defru, X. Bonfils, X. Delfosse +13
Context. Planetary companions of a fixed mass induce larger amplitude reflex motions around lower-mass stars, which helps make M dwarfs excellent targets for extra-solar planet sea…
Revisiting the correlation between stellar activity and planetary surface gravity
P. Figueira, M. Oshagh, V. Zh. Adibekyan +1
Aims: We re-evaluate the correlation between planetary surface gravity and stellar host activity as measured by the index log(). This correlation, previously identified by…
SOPHIE velocimetry of Kepler transit candidates XIV. A joint photometric, spectroscopic, and dynamical analysis of the Kepler-117 system
G. Bruno, J. -M. Almenara, S. C. C. Barros +9
As part of our follow-up campaign of Kepler planets, we observed Kepler-117 with the SOPHIE spectrograph at the Observatoire de Haute-Provence. This F8-type star hosts two transiti…