The HARPS search for southern extra-solar planets: XVII. Super-Earth and Neptune-mass planets in multiple planet systems HD 47 186 and HD 181 433
Year: 2009
Type: article
Abstract: We report on the detection of two new multiple planet systems orbiting solar-like stars HD 47 186 and HD 181 433. The first system contains a hot Neptune of 22.78 with a 4.08-day period and a Saturn of 0.35 MJUP with a 3.7-year period. The second system contains a Super-Earth of 7.5 with a 9.4-day period, a 0.64 MJUP with a 2.6-year period, and a third companion of 0.54 MJUP with a period of about 6 years. These detections increase to 20 the number of close-in low-mass exoplanets (below 0.1 MJUP) and strengthen the fact that 80% of these planets are in multiple planetary systems.
Source: Astronomy and Astrophysics
Institutions: Centre National de la Recherche Scientifique, Institut d'Astrophysique de Paris, Université Pierre-et-Marie-Curie, University of Geneva, University of Bern, Laboratoire atmosphères, milieux, observations spatiales, Université Joseph Fourier, Institut de Planétologie et d'Astrophysique de Grenoble
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2173506134