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arXiv · 0812.1608

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·S. Udry·W. Benz·J-L Bertaux·X. Delfosse·C. Mordasini·F. Pepe·D. Queloz·D. Segransan
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Abstract

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 4.08-days period and a Saturn of 0.35 M_Jup at 3.7-years period. The second system includes a Super-Earth of 7.5 M_Earth at 9.4-days period, a 0.64 M$_Jup at 2.6-years period as well as a third companion of 0.54 M_Jup with a period of about 6 years. These detections increase to 20 the number of close-in low-mass exoplanets (below 0.1 M_Jup) and strengthen the fact that 80% of these planets are in a multiple planetary systems.

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F. Bouchy, M. Mayor, C. Lovis, S. Udry, W. Benz, J-L Bertaux, X. Delfosse, C. Mordasini, F. Pepe, D. Queloz, D. Segransan. 2008-12-09. The HARPS search for southern extra-solar planets. XVII. Super-Earth and Neptune-mass planets in multiple planet systems HD47186 and HD181433. https://doi.org/10.1051/0004-6361%3A200810669

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