The ELODIE survey for northern extra-solar planets. III. Three planetary candidates detected with ELODIE

We present our ELODIE radial-velocity measurements of HD 74156 and 14 Her (HD 145675). These stars ex- hibit low-amplitude radial-velocity variations induced by the presence of low-mass companions. The radial-velocity data of HD 74156 reveal the presence of two planetary companions: a 1.86 MJup planet on a 51.64-d orbit and a 6.2 MJup planet on a long-period (� 5.5 yr) orbit. Both orbits are fairly eccentric (e = 0.64 and 0.58). The 4.7 MJup companion to 14 Her has a long period (4.9 yr) and a moderately eccentric orbit (e = 0.34). We detect an additional linear radial-velocity trend superimposed on the periodic signal for this star. We also compute updated orbital solutions for HD 209458 and 51 Peg (HD 217014). Finally, we present our ELODIE radial-velocity data and orbital solutions for 5 stars known to host planetary companions: Ups And (HD 9826), 55 Cnc (HD 75732), 47 UMa (HD 95128), 70 Vir (HD 117176) and HD 187123. We confirm the previously pub- lished orbital solutions for Ups And, 70 Vir and HD 187123. Our data are not sufficient to fully confirm the orbital solutions for 55 Cnc and 47 UMa.

[1]  T. Brown,et al.  Detection of Planetary Transits Across a Sun-like Star , 1999, The Astrophysical journal.

[2]  B. Shustov.  Protostars and Planets II , 1987 .

[3]  R. P. Butler,et al.  A Transiting “51 Peg-like” Planet , 2000, The Astrophysical journal.

[4]  M. Mayor,et al.  A Jupiter-mass companion to a solar-type star , 1995, Nature.

[5]  R. Paul Butler,et al.  A Planet Orbiting 47 Ursae Majoris , 1996 .

[6]  R. Paul Butler,et al.  Evidence for Multiple Companions to υ Andromedae , 1999 .

[7]  R. Rebolo,et al.  Statistical properties of exoplanets. II. Metallicity, orbital parameters, and space velocities , 2002, astro-ph/0211211.

[8]  Zucker,et al.  The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458. , 2000, The Astrophysical journal.

[9]  R. Paul Butler,et al.  A Second Planet Orbiting 47 Ursae Majoris , 2002 .

[10]  R. P. Butler,et al.  A Planet with a 3.1 Day Period around a Solar Twin , 1998 .

[11]  R. Paul Butler,et al.  The Planet around 51 Pegasi , 1997 .

[12]  Timothy M. Brown,et al.  THE AFOE: A SPECTROGRAPH FOR PRECISION DOPPLER STUDIES , 1994 .

[13]  P. Flower,et al.  Transformations from Theoretical Hertzsprung-Russell Diagrams to Color-Magnitude Diagrams: Effective Temperatures, B-V Colors, and Bolometric Corrections , 1996 .

[14]  S. Baliunas,et al.  Rotation, convection, and magnetic activity in lower main-sequence stars , 1984 .

[15]  Michel Mayor,et al.  ELODIE: A spectrograph for accurate radial velocity measurements , 1996 .

[16]  R. Paul Butler,et al.  Seven New Keck Planets Orbiting G and K Dwarfs , 2003 .

[17]  D. Queloz,et al.  The CORALIE survey for southern extra-solar planets VII - Two short-period Saturnian companions to HD 108147 and HD 168746 , 2002, astro-ph/0202457.

[18]  D. Queloz,et al.  The ELODIE survey for northern extra-solar planets - I. Six new extra-solar planet candidates , 2003, astro-ph/0308281.

[19]  R. Rebolo,et al.  11th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun , 2001 .

[20]  G. Marcy,et al.  A Planetary Companion to 70 Virginis , 1996 .

[21]  A Planet at 5 AU around 55 Cancri , 2002, astro-ph/0207294.

[22]  L. B. Lucy,et al.  Spectroscopic binaries with circular orbits , 1973 .

[23]  M. Zeilik,et al.  Cool Stars, Stellar Systems, and the Sun , 1986 .

[24]  Sallie L. Baliunas,et al.  A Survey of CA II H and K Chromospheric Emission in Southern Solar-Type Stars , 1996 .

[25]  R. Paul Butler,et al.  Three New “51 Pegasi-Type” Planets , 1997 .