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Our aim is to detect and characterise long-period companions around mainsequence stars (spectral types late F to early M). We use the RV method tosearch for exoplanets around stars. The RV variations are measured with HARPSat the ESO 3.6 metre telescope. The true mass and inclination of our heaviercompanions are provided by astrometry, for which we use proper motions fromHipparcos and Gaia. Five Jupiter-mass exoplanets are reported to orbitHIP54597, BD-210397 (x2), HD74698, and HD94771 with 8.9 yr, 5.2 yr, 17.4 yr,9.4 yr, and 5.9 yr orbits, and to have minimum masses of $2.01 \pm 0.03$, $0.7\pm 0.1$, $2.4^{+1.5}_{-0.2}$, $0.40 \pm 0.06$, and $0.53 \pm 0.03 M_J$respectively. HD74698 also hosts a highly irradiated Neptune in a 15 day orbitwith a minimum mass of $0.07 \pm 0.01 M_J$. The mass of HIP54597 b canmaximally increase by 10% - 30%, the minimum mass of HD74698 c is likely equalto its true mass, and BD-210397 c has a mass of $2.66^{+0.63}_{-0.32} M_J$.HD62364 hosts a brown dwarf with a true mass of $18.77^{+0.66}_{-0.63} M_J$ inan orbit of 14 yr. HD56380B, HD221638B, and HD33473C have minimum masses withinthe brown dwarf limits, in orbits of 8.9 yr, 16.6 yr, and 50 yr respectively;however, astrometric measurements reveal them to be stellar binaries, withmasses of $375.3^{+8.6}_{-8.4}$, $110.0^{+3.9}_{-3.7}$, and$271.0^{+3.9}_{-3.8} M_J$. The orbits of the stellar binaries HD11938 andHD61383 are incomplete. The preliminary result for HD61383 is a 0.190$M_{\odot}$ binary in a 39 yr orbit. The secondary of the binary system HD11938has a mass of 0.33 $M_{\odot}$ - which is confirmed by a secondary peak in theCCF - and a preliminary period of 35 yr. The origin of the 3.0 yr RV signal ofHD3964 is uncertain as it shows entanglement with the magnetic cycle of thestar. We finally report one more star, HD11608, with a magnetic cycle thatmimics a planetary signal.

astronomy and astrophysics

The HARPS search for southern extra-solar planets. XLVII. Five  Jupiter-mass planets in long-period orbits, one highly irradiated Neptune,  one brown dwarf, and five stellar binaries