# The HARPS search for southern extra-solar planets. XXX. Planetary systems around stars with solar-like magnetic cycles and short-term activity variation

@article{Dumusque2011TheHS,
title={The HARPS search for southern extra-solar planets. XXX. Planetary systems around stars with solar-like magnetic cycles and short-term activity variation},
author={Xavier Dumusque and Christophe Lovis and Damien S'egransan and Michel Mayor and St{\'e}phane Udry and W. Benz and François Bouchy and Gaspare Lo Curto and Christoph Mordasini and Francesco A. Pepe and Didier Queloz and Nuno C. Santos and Dominique Naef},
journal={arXiv: Earth and Planetary Astrophysics},
year={2011}
}
• Published 8 July 2011
• Physics, Geology
• arXiv: Earth and Planetary Astrophysics
We present the discovery of four new long-period planets within the HARPS high-precision sample: \object{HD137388}b ($M\sin{i}$ = 0.22 $M_J$), \object{HD204941}b ($M\sin{i}$ = 0.27 $M_J$), \object{HD7199}b ($M\sin{i}$ = 0.29 $M_J$), \object{HD7449}b ($M\sin{i}$ = 1.04 $M_J$). A long-period companion, probably a second planet, is also found orbiting HD7449. Planets around HD137388, HD204941, and HD7199 have rather low eccentricities (less than 0.4) relative to the 0.82 eccentricity of HD7449b…
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