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The HARPS search for southern extra-solar planets. XVII. Super-Earth and Neptune-mass planets in multiple planet systems HD47186 and HD181433
F. Bouchy, M. Mayor, C. Lovis +8
This paper reports on the detection of two new multiple planet systems around solar-like stars HD47186 and HD181433. The first system includes a hot Neptune of 22.78 M_Earth at 4.0…
The HARPS search for southern extra-solar planets. XIII. A planetary system with 3 Super-Earths (4.2, 6.9, & 9.2 Earth masses)
M. Mayor, S. Udry, C. Lovis +7
This paper reports on the detection of a planetary system with three Super-Earths orbiting HD40307. HD40307 is a K2V metal-deficient star at a distance of only 13 parsec, part of t…
Giant Planet Formation by Core Accretion
Christoph Mordasini, Yann Alibert, Willy Benz +1
We present a review of the standard paradigm for giant planet formation, the core accretion theory. After an overview of the basic concepts of this model, results of the original i…
Formation and structure of the three Neptune-mass planets system around HD69830
Yann Alibert, Isabelle Baraffe, Willy Benz +8
Since the discovery of the first giant planet outside the solar system in 1995 (Mayor & Queloz 1995), more than 180 extrasolar planets have been discovered. With improving detectio…
The HARPS search for southern extra-solar planets V. A 14 Earth-masses planet orbiting HD 4308
S. Udry, M. Mayor, W. Benz +7
We present here the discovery and characterisation of a very light planet around HD4308. The planet orbits its star in 15.56 days. The circular radial-velocity variation presents a…
New Jupiter and Saturn formation models meet observations
Yann Alibert, Olivier Mousis, Christoph Mordasini +1
The wealth of observational data about Jupiter and Saturn provides strong constraints to guide our understanding of the formation of giant planets. The size of the core and the tot…