10.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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23 papers · 2 filters
An icy Kuiper-Belt around the young solar-type star HD 181327
J. Lebreton, J. -C. Augereau, W. -F. Thi +18
HD 181327 is a young F5/F6V star belonging to the Beta Pictoris moving group (12 Myr). It harbors an optically thin belt of circumstellar material at 90 AU. We aim to study the dus…
Stellar jitter from variable gravitational redshift: implications for RV confirmation of habitable exoplanets
H. M. Cegla, C. A. Watson, T. R. Marsh +6
A variation of gravitational redshift, arising from stellar radius fluctuations, will introduce astrophysical noise into radial velocity measurements by shifting the centroid of th…
Transmission spectrum of Venus as a transiting exoplanet
David Ehrenreich, Alfred Vidal-Madjar, Thomas Widemann +6
On 5-6 June 2012, Venus will be transiting the Sun for the last time before 2117. This event is an unique opportunity to assess the feasibility of the atmospheric characterisation…
The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample
X. Bonfils, X. Delfosse, S. Udry +11
(Abridged) Searching for planets around stars with different masses probes the outcome of planetary formation for different initial conditions. This drives observations of a sample…
The SOPHIE search for northern extrasolar planets. IV. Massive companions in the planet-brown dwarf boundary
R. F. Díaz, A. Santerne, J. Sahlmann +20
The mass domain where massive extrasolar planets and brown dwarfs lay is still poorly understood. Indeed, not even a clear dividing line between massive planets and brown dwarfs ha…
Corrigendum to "The upper atmosphere of the exoplanet HD209458b revealed by the sodium D lines: Temperature-pressure profile, ionization layer and thermosphere" [2011, A&A, 527, A110]
A. Vidal-Madjar, C. M. Huitson, A. Lecavelier des Etangs +7
An error was detected in the code used for the analysis of the HD209458b sodium profile (Vidal-Madjar et al. 2011). Here we present an updated T-P profile and briefly discuss the c…
Searching for faint companions with VLTI/PIONIER. I. Method and first results
Olivier Absil, Jean-Baptiste Le Bouquin, Jean-Philippe Berger +10
Context. A new four-telescope interferometric instrument called PIONIER has recently been installed at VLTI. It provides improved imaging capabilities together with high precision.…
Hot exozodiacal dust resolved around Vega with IOTA/IONIC
D. Defrère, O. Absil, J. -C. Augereau +10
Although debris discs have been detected around a significant number of main-sequence stars, only a few of them are known to harbour hot dust in their inner part where terrestrial…
High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT)
Fabien Malbet, Alain Léger, Michael Shao +49
(abridged) A complete census of planetary systems around a volume-limited sample of solar-type stars (FGK dwarfs) in the Solar neighborhood with uniform sensitivity down to Earth-m…
SOPHIE velocimetry of Kepler transit candidates III. KOI-423b: an 18 Mjup transiting companion around an F7IV star
F. Bouchy, A. S. Bonomo, A. Santerne +10
We report the strategy and results of our radial velocity follow-up campaign with the SOPHIE spectrograph (1.93-m OHP) of four transiting planetary candidates discovered by the Kep…
Spatially resolved submm imaging of the HR 8799 debris disk
J. Patience, J. Bulger, R. R. King +7
Dynamical interactions between planets and debris disks may sculpt the disk structure and impact planetary orbits, but only a few systems with both imaged planets and spatially res…
The mass function of IC4665 revisited by the UKIDSS Galactic Clusters Survey
N. Lodieu, W. -J. de Wit, G. Carraro +3
Knowledge of the mass function in open clusters constitutes one way to constrain the formation of low-mass stars and brown dwarfs as does the knowledge of the frequency of multiple…
Spin-orbit inclinations of the exoplanetary systems HAT-P-8, HAT-P-9, HAT-P-16 and HAT-P-23
Claire Moutou, Rodrigo F. Diaz, Stephane Udry +22
We report the measurement of the spin-orbit angle of the extra-solar planets HAT-P-8 b, HAT-P-9 b, HAT-P-16 b and HAT-P-23 b, thanks to spectroscopic observations performed at the…
On the Evolution of Dust Mineralogy, From Protoplanetary Disks to Planetary Systems
Isa Oliveira, Johan Olofsson, Klaus M. Pontoppidan +3
Mineralogical studies of silicate features emitted by dust grains in protoplanetary disks and Solar System bodies can shed light on the progress of planet formation. The significan…
The unusual protoplanetary disk around the T Tauri star ET Cha
P. Woitke, B. Riaz, G. Duchene +15
We present new continuum and line observations, along with modelling, of the faint (6-8) Myr old T Tauri star ET Cha belonging to the eta Chamaeleontis cluster. We have acquired HE…
Yearly and seasonal variations of low albedo surfaces on Mars in the OMEGA/MEx dataset: Constraints on aerosols properties and dust deposits
Mathieu Vincendon, Yves Langevin, François Poulet +5
The time variations of spectral properties of dark martian surface features are investigated using the OMEGA near-IR dataset. The analyzed period covers two Mars years, spanning fr…
Mass-loss rates for transiting exoplanets
David Ehrenreich, Jean-Michel Désert
Exoplanets at small orbital distances from their host stars are submitted to intense levels of energetic radiations, X-rays and extreme ultraviolet (EUV). Depending on the masses a…
HST/STIS Lyman-alpha observations of the quiet M dwarf GJ436: Predictions for the exospheric transit signature of the hot neptune GJ436b
David Ehrenreich, Alain Lecavelier des Etangs, Xavier Delfosse
Lyman-alpha (Lya) emission of neutral hydrogen (1215.67 Angström) is the main contributor to the ultraviolet flux of low-mass stars such as M dwarfs. It is also the main light sour…
The effect of the regular solution model in the condensation of protoplanetary dust
Francesco C. Pignatale, Sarah T. Maddison, Vianney Taquet +2
We utilize a chemical equilibrium code in order to study the condensation process which occurs in protoplanetary discs during the formation of the first solids. The model specifica…
A short-period super-Earth orbiting the M2.5 dwarf GJ3634. Detection with Harps velocimetry and transit search with Spitzer photometry
X. Bonfils, M. Gillon, T. Forveille +12
We report on the detection of GJ3634b, a super-Earth of mass m sin i = 7.0 +/-0.9 Mearth and period P = 2.64561 +/- 0.00066 day. Its host star is a M2.5 dwarf, has a mass of 0.45+/…
The retrograde orbit of the HAT-P-6b exoplanet
G. Hebrard, D. Ehrenreich, F. Bouchy +18
We observed with the SOPHIE spectrograph (OHP, France) the transit of the HAT-P-6b exoplanet across its host star. The resulting stellar radial velocities display the Rossiter-McLa…
Planetary detection limits taking into account stellar noise. II. Effect of stellar spot groups on radial-velocities
X. Dumusque, N. C. Santos, S. Udry +2
The detection of small mass planets with the radial-velocity technique is now confronted with the interference of stellar noise. HARPS can now reach a precision below the meter-per…
Probing the impact of stellar duplicity on the frequency of giant planets: final results of our VLT/NACO survey
A. Eggenberger, S. Udry, G. Chauvin +4
If it is commonly agreed that the presence of a (moderately) close stellar companion affects the formation and the dynamical evolution of giant planets, the frequency of giant plan…