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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- University of GenevaCH577 papers
39 papers · 2 filters
Discovery of the Fomalhaut C debris disc
G. M. Kennedy, M. C. Wyatt, P. Kalas +5
Fomalhaut is one of the most interesting and well studied nearby stars, hosting at least one planet, a spectacular debris ring, and two distant low-mass stellar companions (TW PsA…
Can eccentric debris disks be long-lived? A first numerical investigation and application to Reticuli
V. Faramaz, H. Beust, P. Thébault +13
Imaging of debris disks has found evidence for both eccentric and offset disks. One hypothesis is that these provide evidence for massive perturbers that sculpt the observed struct…
Evolution from protoplanetary to debris discs: The transition disc around HD 166191
G. M. Kennedy, S. J. Murphy, C. M. Lisse +12
HD 166191 has been identified by several studies as hosting a rare and extremely bright warm debris disc with an additional outer cool disc component. However, an alternative inter…
Geochemical and planetary dynamical views on the origin of Earth's atmosphere and oceans
Nicolas Dauphas, Alessandro Morbidelli
Earth's volatile elements (H, C, and N) are essential to maintaining habitable conditions for metazoans and simpler life forms. However, identifying the sources (comets, meteorites…
The SOPHIE search for northern extrasolar planets: VI. Three new hot Jupiters in multi-planet extrasolar systems
C. Moutou, G. Hebrard, F. Bouchy +21
We present high-precision radial-velocity measurements of three solar-type stars: HD 13908, HD 159243, and HIP 91258. The observations were made with the SOPHIE spectrograph at the…
Grain Size segregation in debris discs
Philippe Thebault, Quentin Kral, Jean-Charles Augereau
In most debris discs, dust grain dynamics is strongly affected by stellar radiation pressure. As this mechanism is size-dependent, we expect dust grains to be spatially segregated…
Herschel Observations of Debris Discs Orbiting Planet-hosting Subgiants
Amy Bonsor, Grant M. Kennedy, Mark C. Wyatt +2
Debris discs are commonly detected orbiting main-sequence stars, yet little is known regarding their fate as the star evolves to become a giant. Recent observations of radial veloc…
Confirmation of the planet around HD 95086 by direct imaging
J. Rameau, G. Chauvin, A. -M. Lagrange +8
VLT/NaCo angular differential imaging at L' (3.8 microns) revealed a probable giant planet comoving with the young and early-type HD 95086 also known to harbor an extended debris d…
Multiple spiral patterns in the transitional disk of HD 100546
A. Boccaletti, E. Pantin, A. -M. Lagrange +3
Protoplanetary disks around young stars harbor many structures related to planetary formation. Of particular interest, spiral patterns were discovered among several of these disks…
Extrasolar planets and brown dwarfs around A--F type stars. VIII. A giant planet orbiting the young star HD113337
S. Borgniet, I. Boisse, A. -M. Lagrange +19
In the frame of the search for extrasolar planets and brown dwarfs around early-type main-sequence stars, we present the detection of a giant planet around the young F-type star HD…
Characterizing small planets transiting small stars with SPIRou
A. Santerne, J. -F. Donati, R. Doyon +9
SPIRou, a near infrared spectropolarimeter, is a project of new instrument to be mounted at the Canada France Hawaii Telescope in 2017. One of the main objectives of SPIRou is to r…
The PLATO 2.0 Mission
H. Rauer, C. Catala, C. Aerts +159
PLATO 2.0 has recently been selected for ESA's M3 launch opportunity (2022/24). Providing accurate key planet parameters (radius, mass, density and age) in statistical numbers, it…
Imaging diagnostics for transitional discs
M. de Juan Ovelar, M. Min, C. Dominik +4
Transitional discs are a special type of protoplanetary discs where planet formation is thought to be taking place. These objects feature characteristic inner cavities and/or gaps…
Further Evidence of the Planetary Nature of HD 95086 b from Gemini/NICI H-band Data
T. Meshkat, V. Bailey, J. Rameau +8
We present our analysis of the Gemini/NICI H-band data of HD 95086, following the discovery of the planet HD 95086 b in L'. The H-band data reach a contrast of 12.7 mag relative to…
Search for a habitable terrestrial planet transiting the nearby red dwarf GJ 1214
M. Gillon, B. -O. Demory, N. Madhusudhan +12
High-precision eclipse spectrophotometry of transiting terrestrial exoplanets represents a promising path for the first atmospheric characterizations of habitable worlds and the se…
Magnetic self-organisation in Hall-dominated magnetorotational turbulence
Matthew W. Kunz, Geoffroy Lesur
The magnetorotational instability (MRI) is the most promising mechanism by which angular momentum is efficiently transported outwards in astrophysical discs. However, its applicati…
Ground-based detection of Calcium and possibly Scandium and Hydrogen in the atmosphere of HD 209458b
N. Astudillo-Defru, P. Rojo
Context: Since the first exoplanetary atmosphere detection using the Hubble Space Telescope, characterization of exoplanet atmospheres from the ground have been playing an increasi…
Prospects of detecting the polarimetric signature of the Earth-mass planet alpha Centauri B b with SPHERE / ZIMPOL
Julien Milli, David Mouillet, Dimitri Mawet +5
Over the past five years, radial-velocity and transit techniques have revealed a new population of Earth-like planets with masses of a few Earth masses. Their very close orbit arou…
Herschel's "Cold Debris Disks": Background Galaxies or Quiescent Rims of Planetary Systems?
A. V. Krivov, C. Eiroa, T. Löhne +24
(abridged) Infrared excesses associated with debris disk host stars detected so far peak at wavelengths around ~100μm or shorter. However, six out of 31 excess sources in the Hersc…
An interferometric study of the Fomalhaut inner debris disk. III. Detailed models of the exozodiacal disk and its origin
J. Lebreton, R. van Lieshout, J. -C. Augereau +15
[Abridged] Debris disks are extrasolar analogs to the solar system planetesimal belts. The star Fomalhaut harbors a cold debris belt at 140 AU as well as evidence of a warm dust co…
The HARPS search for southern extra-solar planets. XXXIV. A planetary system around the nearby M dwarf GJ163, with a super-Earth possibly in the habitable zone
X. Bonfils, G. Lo Curto, A. C. M. Correia +19
The meter-per-second precision achieved by today velocimeters enables the search for 1-10 M_Earth planets in the habitable zone of cool stars. This paper reports on the detection o…
The short-lived production of exozodiacal dust in the aftermath of a dynamical instability in planetary systems
Amy Bonsor, Sean Raymond, Jean-Charles Augereau
Excess emission, associated with warm, dust belts, commonly known as exozodis, has been observed around a third of nearby stars. The high levels of dust required to explain the obs…
TraMoS project III: Improved physical parameters, timing analysis, and star-spot modelling of the WASP-4b exoplanet system from 38 transit observations
S. Hoyer, M. Lopez-Morales, P. Rojo +7
We report twelve new transit observations of the exoplanet WASP-4b from the Transit Monitoring in the South Project (TraMoS) project. These transits are combined with all previousl…
Planets around stars in young nearby associations *** radial Velocity searches: a feasibility study, and first results
A. -M. Lagrange, N. Meunier, G. Chauvin +5
Stars in young nearby associations are the only targets allowing giant planet searches at all separations in the near future, by coupling indirect techniques such as radial velocit…