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The Kepler-454 System: A Small, Not-rocky Inner Planet, a Jovian World, and a Distant Companion
Sara Gettel, David Charbonneau, Courtney D. Dressing +47
Kepler-454 (KOI-273) is a relatively bright (V = 11.69 mag), Sun-like starthat hosts a transiting planet candidate in a 10.6 d orbit. From spectroscopy, we estimate the stellar tem…
Radial velocity information content of M dwarf spectra in the near-infrared
P. Figueira, V. Zh. Adibekyan, M. Oshagh +7
Aims: We evaluate the radial velocity (RV) information content and achievable precision on M0-M9 spectra covering the ZYJHK bands. We do so while considering both a perfect atmosph…
The HARPS search for southern extra-solar planets. XXXIX. HD175607 b, the most metal-poor G dwarf with an orbiting sub-Neptune
A. Mortier, J. P. Faria, N. C. Santos +16
Context. The presence of a small-mass planet (M0.1\,M) seems, to date, not to depend on metallicity, however, theoretical simulations have shown that stars with subsol…
A rocky planet transiting a nearby low-mass star
Zachory K. Berta-Thompson, Jonathan Irwin, David Charbonneau +18
M-dwarf stars -- hydrogen-burning stars that are smaller than 60 per cent of the size of the Sun -- are the most common class of star in our Galaxy and outnumber Sun-like stars by…
HARPS-N observes the Sun as a star
Xavier Dumusque, Alex Glenday, David F. Phillips +16
Radial velocity perturbations induced by stellar surface inhomogeneities including spots, plages and granules currently limit the detection of Earth-twins using Doppler spectroscop…
The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles
R. F. Díaz, D. Ségransan, S. Udry +22
We present the analysis of the entire HARPS observations of three stars that host planetary systems: HD1461, HD40307, and HD204313. The data set spans eight years and contains more…