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We report precise Doppler measurements of HD 142022 obtained during the past six years with the CORALIE echelle spectrograph at La Silla Observatory together with a few additional observations made recently with the HARPS echelle…

Astrophysics · Physics 2009-11-11 A. Eggenberger , M. Mayor , D. Naef , F. Pepe , D. Queloz , N. C. Santos , S. Udry , C. Lovis

We present the results of near-infrared, follow-up imaging and spectroscopic observations at VLT, aimed at characterizing the long-period companions of the exoplanet host stars HD196885, HD1237 and HD27442. The three companions were…

Astrophysics · Physics 2007-11-01 G. Chauvin , A. -M. Lagrange , S. Udry , M. Mayor

Direct imaging has just started the inventory of the population of gas giant planets on wide-orbits around young stars in the solar neighborhood. Following this approach, we carried out a deep imaging survey in the near-infrared using…

We present radial-velocity measurements obtained with the ELODIE and AFOE spectrographs for GJ 777 A (HD 190360), a metal-rich ([Fe/H]=0.25) nearby (d=15.9 pc) star in a stellar binary system. A long-period low radial-velocity amplitude…

A precise radial velocity survey conducted by a Korean-Japanese planet search program revealed a planetary companion around the intermediate-mass clump giant HD 100655. The radial velocity of the star exhibits a periodic Keplerian variation…

We report the discovery of a massive (Mp = 9.04+/-0.50 MJup) planet transiting the bright (V = 8.7) F8 star HD 147506, with an orbital period of 5.63341+/-0.00013 days and an eccentricity of e = 0.520+/-0.010. From the transit light curve…

Aims. The project aims to understand better the role of wide brown dwarf companions on planetary systems. Methods. We obtained high-resolution spectra of six bright stars with co-moving wide substellar companions with the SONG, CARMENES,…

Earth and Planetary Astrophysics · Physics 2023-03-01 J. Šubjak , N. Lodieu , P. Kabáth , H. M. J. Boffin , G. Nowak , F. Grundahl , V. J. S. Béjar , M. R. Zapatero Osorio , V. Antoci

The extrasolar planetary system around HR 8799 is the first multiplanet system ever imaged. It is also, by a wide margin, the highest mass system with >27 Jupiters of planetary mass past 25 AU. This is a remarkable system with no analogue…

Earth and Planetary Astrophysics · Physics 2010-01-06 Laird M. Close , Jared R. Males

Based on two decades of radial velocity (RV) observations using Keck/HIRES and McDonald/Tull, and more recent observations using the Automated Planet Finder, we found that the nearby star HR 5183 (HD 120066) hosts a 3$M_J$ minimum mass…

We report the discovery of a substellar companion to the intermediate-mass star HD 11977 (G5 III). Radial velocities of this star have been monitored for five years with FEROS at the 1.52-m ESO and later at the 2.2-m MPG/ESO telescope in La…

We report the discovery of a highly eccentric long-period Jovian planet orbiting the hot-Jupiter host HD\,83443. By combining radial velocity data from four instruments (AAT/UCLES, Keck/HIRES, HARPS, Minerva-Australis) spanning more than…

We present radial-velocity measurements obtained in a programs underway to search for extrasolar planets with the spectrograph SOPHIE at the 1.93-m telescope of the Haute-Provence Observatory. Targets were selected from catalogs observed…

We report on the first extra-solar planet discovered with the brand new HARPS instrument. The planet is a typical 'hot Jupiter' with m2sini = 0.62 MJup and an orbital period of 3.39 days, but from the photometric follow-up of its parent…

We have performed RV monitoring of the components of the binary system HD 106515 over about 11 years using the high resolution spectrograph SARG at TNG. The primary shows long-period radial velocity variations that indicate the presence of…

Earth and Planetary Astrophysics · Physics 2015-06-11 S. Desidera , R. Gratton , E. Carolo , A. F. Martinez Fiorenzano , M. Endl , D. Mesa , M. Cecconi , R. Claudi , R. Cosentino , S. Scuderi , A. Sozzetti , A. Zurlo

Observations of the star EPIC 220208795 (2MASS J01105556+0018507) reveal a single, deep and asymmetric eclipse, which we hypothesize is due to an eclipsing companion surrounded by a tilted and inclined opaque disk, similar to those seen…

Earth and Planetary Astrophysics · Physics 2022-02-09 L. van der Kamp , D. M. van Dam , M. A. Kenworthy , E. E. Mamajek , G. Pojmański

Precise radial-velocity observations at Haute-Provence Observatory (OHP, France) with the ELODIE echelle spectrograph have been undertaken since 1994. In addition to several discoveries described elsewhere, including and following that of…

Astrophysics · Physics 2009-11-10 C. Perrier , J. P. Sivan , D. Naef , J. L. Beuzit , M. Mayor , D. Queloz , S. Udry

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 $M_J$),…

Earth and Planetary Astrophysics · Physics 2015-05-28 X. Dumusque , C. Lovis , D. Ségransan , M. Mayor , S. Udry , W. Benz , F. Bouchy , G. Lo Curto , C. Mordasini , F. Pepe , D. Queloz , N. C. Santos , D. Naef