806 citations · 26.4k across the 321 of their papers we have counts for
16 papers · 2 filters
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…
The Earth transiting the Sun as seen from Jupiter's moons: detection of an inverse Rossiter-McLaughlin effect produced by the Opposition Surge of the icy Europa
Paolo Molaro, Mauro Barbieri, Lorenzo Monaco +2
We report on a multi-wavelength observational campaign which followed the Earth's transit on the Sun as seen from Jupiter on 5 Jan the 2014. Simultaneous observations of Jupiter's…
Detecting ring systems around exoplanets using high resolution spectroscopy: the case of 51Pegb
N. C. Santos, J. H. C. Martins, G. Boué +13
In this paper we explore the possibility that the recently detected reflected light signal of 51\,Peg\,b could be caused by a ring system around the planet. We use a simple model t…
Characterization of a spurious one-year signal in HARPS data
Xavier Dumusque, Francesco Pepe, Christophe Lovis +1
The HARPS spectrograph is showing an extreme stability close to the m s-1 level over more than ten years of data. However the radial velocities of some stars are contaminated by a…
The HARPS-N Rocky Planet Search I. HD219134b: A transiting rocky planet in a multi-planet system at 6.5 pc from the Sun
F. Motalebi, S. Udry, M. Gillon +36
We present here the detection of a system of four low-mass planets around the bright (V=5.5) and close-by (6.5 pc) star HD219134. This is the first result of the Rocky Planet Searc…
Evidence for a spectroscopic direct detection of reflected light from 51 Peg b
J. H. C. Martins, N. C. Santos, P. Figueira +11
The detection of reflected light from an exoplanet is a difficult technical challenge at optical wavelengths. Even though this signal is expected to replicate the stellar signal, n…
Hubble Space Telescope search for the transit of the Earth-mass exoplanet Alpha Centauri Bb
Brice-Olivier Demory, David Ehrenreich, Didier Queloz +13
Results from exoplanet surveys indicate that small planets (super-Earth size and below) are abundant in our Galaxy. However, little is known about their interiors and atmospheres.…
A Non-isothermal Theory for Interpreting Sodium Lines in Transmission Spectra of Exoplanets
Kevin Heng, Aurélien Wyttenbach, Baptiste Lavie +3
We present a theory for interpreting the sodium lines detected in transmission spectra of exoplanetary atmospheres. Previous analyses employed the isothermal approximation and deal…
Spectrally resolved detection of sodium in the atmosphere of HD189733b with the HARPS spectrograph
A. Wyttenbach, D. Ehrenreich, C. Lovis +2
Atmospheric properties of exoplanets can be constrained with transit spectroscopy. The signature of atomic sodium NaI, known to be present above the clouds, is a powerful probe of…
Kuiper belt structure around nearby super-Earth host stars
Grant M. Kennedy, Luca Matrà, Maxime Marmier +9
We present new observations of the Kuiper belt analogues around HD 38858 and HD 20794, hosts of super-Earth mass planets within 1 au. As two of the four nearby G-type stars (with H…
The EChO science case
Giovanna Tinetti, Pierre Drossart, Paul Eccleston +347
The discovery of almost 2000 exoplanets has revealed an unexpectedly diverse planet population. Observations to date have shown that our Solar System is certainly not representativ…