Publications (269)
A catalog of rotational and radial velocities for evolved stars V. Southern stars
J. R. De Medeiros, S. Alves, S. Udry +3
Rotational and radial velocities have been measured for 1589 evolved stars of spectral types F, G and K and luminosity classes IV, III, II and Ib, based on observations carried out…
Chemical abundances for the transiting planet host stars OGLE-TR-10, 56, 111, 113, 132 and TrES-1. Abundances in different galactic populations
N. C. Santos, A. Ecuvillon, G. Israelian +6
We used the UVES spectrograph (VLT-UT2 telescope) to obtain high-resolution spectra of 6 stars hosting transiting planets, namely for OGLE-TR-10, 56, 111, 113, 132 and TrES-1. The…
Transiting exoplanets from the CoRoT space mission II. CoRoT-Exo-2b: A transiting planet around an active G star
R. Alonso, M. Auvergne, A. Baglin +40
Context. The CoRoT mission, a pioneer in exoplanet searches from space, has completed its first 150 days of continuous observations of ~12000 stars in the galactic plane. An analys…
The HARPS search for southern extra-solar planets XII. A giant planet orbiting the metal-poor star HD171028
N. C. Santos, M. Mayor, F. Bouchy +3
In this paper we present the detection of a 1.8 M_Jup planet in a 538 day period trajectory orbiting the metal-poor star HD171028 ([Fe/H]=-0.49). This planet is the first to be dis…
Oxygen abundances in planet-harbouring stars. Comparison of different abundance indicators
A. Ecuvillon, G. Israelian, N. C. Santos +3
We present a detailed and uniform study of oxygen abundances in 155 solar type stars, 96 of which are planet hosts and 59 of which form part of a volume-limited comparison sample w…
Improved precision on the radius of the nearby super-Earth 55 Cnc e
M. Gillon, B. -O. Demory, B. Benneke +9
We report on new transit photometry for the super-Earth 55 Cnc e obtained with Warm Spitzer/IRAC at 4.5 microns. An individual analysis of these new data leads to a planet radius o…
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 +8
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 4.0…
TOI-1634 b: an Ultra-Short Period Keystone Planet Sitting Inside the M Dwarf Radius Valley
R. Cloutier, D. Charbonneau, K. G. Stassun +63
Studies of close-in planets orbiting M dwarfs have suggested that the M dwarf radius valley may be well-explained by distinct formation timescales between enveloped terrestrials, a…
The HARPS search for Earth-like planets in the habitable zone: I -- Very low-mass planets around HD20794, HD85512 and HD192310
F. Pepe, C. Lovis, D. Ségransan +7
In 2009 we started an intense radial-velocity monitoring of a few nearby, slowly-rotating and quiet solar-type stars within the dedicated HARPS-Upgrade GTO program. The goal of thi…
WASP-16b: A new Jupiter-like planet transiting a southern solar analog
T. A. Lister, D. R. Anderson, M. Gillon +29
We report the discovery from WASP-South of a new Jupiter-like extrasolar planet, WASP-16b, which transits its solar analog host star every 3.12 days. Analysis of the transit photom…
The ELODIE survey for northern extra--solar planets I. 6 new extra--solar planet candidates
C. Perrier, J. P. Sivan, D. Naef +4
Precise radial-velocity observations at Haute-Provence Observatory (OHP, France) with the ELODIE echelle spectrograph have been undertaken since 1994. In addition to several discov…
A planet-sized transiting star around OGLE-TR-122 - Accurate mass and radius near the Hydrogen-burning limit
F. Pont, C. H. F. Melo, F. Bouchy +4
We report the discovery and characterisation of OGLE-TR-122b, the smallest main-sequence star to date with a direct radius determination. OGLE-TR-122b transits around its solar-typ…
Insights into the formation of barium and Tc-poor S stars from an extended sample of orbital elements
A. Jorissen, S. Van Eck, M. Mayor +1
The set of orbital elements available for chemically-peculiar red giant (PRG) stars has been considerably enlarged thanks to a decade-long CORAVEL radial-velocity monitoring of abo…
New constrains on Gliese 86 B
A. -M. Lagrange, H. Beust, S. Udry +2
We present the results of multi epochs imaging observations of the companion to the planetary host Gliese 86. Associated to radial velocity measurements, this study aimed at charac…
Characterization of the K2-18 multi-planetary system with HARPS: A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit
R. Cloutier, N. Astudillo-Defru, R. Doyon +16
The bright M dwarf K2-18 at 34 pc is known to host a transiting super-Earth-sized planet orbiting within the star's habitable zone; K2-18b. Given the superlative nature of this sys…
Stellar activity of planetary host star HD 189733
I. Boisse, C. Moutou, A. Vidal-Madjar +20
Extra-solar planet search programs require high-precision velocity measurements. They need to study how to disentangle radial-velocity variations due to Doppler motion from the noi…
The HARPS search for southern extra-solar planets. XLIII. A compact system of four super-Earth planets orbiting HD 215152
J. -B. Delisle, D. Ségransan, X. Dumusque +22
We report the discovery of four super-Earth planets around HD 215152, with orbital periods of 5.76, 7.28, 10.86, and 25.2 d, and minimum masses of 1.8, 1.7, 2.8, and 2.9 M_Earth re…
Evaluating the stability of atmospheric lines with HARPS
P. Figueira, F. Pepe, C. Lovis +1
Context: In the search for extrasolar systems by radial velocity technique, a precise wavelength calibration is necessary for high-precision measurements. The choice of the calibra…
Driving current through single organic molecules
J. Reichert, R. Ochs, D. Beckmann +3
We investigate electronic transport through two types of conjugated molecules. Mechanically controlled break-junctions are used to couple thiol endgroups of single molecules to two…
A Planet Candidate in the Stellar Triple System HD178911
S. Zucker, D. Naef, D. W. Latham +9
We report the detection of a low-mass companion orbiting the solar-type star HD178911B, the distant component of the stellar triple system HD178911. The variability of HD178911B wa…
From Espresso to Codex
J. Liske, L. Pasquini, P. Bonifacio +24
CODEX and ESPRESSO are concepts for ultra-stable, high-resolution spectrographs at the E-ELT and VLT, respectively. Both instruments are well motivated by distinct sets of science…
The HARPS survey for southern extra-solar planets II. A 14 Earth-masses exoplanet around mu Arae
N. C. Santos, F. Bouchy, M. Mayor +13
In this letter we present the discovery of a very light planetary companion to the star mu Ara (HD160691). The planet orbits its host once every 9.5days, and induces a sinusoidal r…
New neighbours. III. 21 new companions to nearby dwarfs, discovered with adaptive optics
J. -L. Beuzit, D. Segransan, T. Forveille +8
We present some results of a CFHT adaptive optics search for companions to nearby dwarfs. We identify 21 new components in solar neighbourhood systems, of which 13 were found while…
The HIPPARCOS Hertzsprung-Russell diagram of S stars: Probing nucleosynthesis and dredge-up
S. Van Eck, A. Jorissen, S. Udry +2
HIPPARCOS trigonometrical parallaxes make it possible to compare the location of Tc-rich and Tc-poor S stars in the Hertzsprung-Russell (HR) diagram: Tc-rich S stars are found to b…
Astrometric planet search around southern ultracool dwarfs I: First results, including parallaxes of 20 M8-L2 dwarfs
J. Sahlmann, P. F. Lazorenko, D. Segransan +4
Extrasolar planet searches targeting very low-mass stars and brown dwarfs are hampered by intrinsic or instrumental limitations. Time series of astrometric measurements with precis…
The HARPS search for southern extrasolar planets: XXXIII. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone
G. Lo Curto, M. Mayor, W. Benz +10
The vast diversity of planetary systems detected to date is defying our capability of understanding their formation and evolution. Well-defined volume-limited surveys are the best…
The CORALIE survey for southern extrasolar planets XVIII. Three new massive planets and two low mass brown dwarfs at separation larger than 5 AU
E. L. Rickman, D. Ségransan, M. Marmier +36
Context. Since 1998, a planet-search around main sequence stars within 50~pc in the southern hemisphere has been carried out with the CORALIE spectrograph at La Silla Observatory.…
New and updated stellar parameters for 71 evolved planet hosts. On the metallicity - giant planet connection
A. Mortier, N. C. Santos, S. G. Sousa +5
It is still being debated whether the well-known metallicity - giant planet correlation for dwarf stars is also valid for giant stars. For this reason, having precise metallicities…
The RoPES project with HARPS and HARPS-N. I. A system of super-Earths orbiting the moderately active K-dwarf HD 176986
A. Suárez Mascareño, J. I. González Hernández, R. Rebolo +12
We report the discovery of a system of two super-Earths orbiting the moderately active K-dwarf HD 176986. This work is part of the RoPES RV program of G- and K-type stars, which co…
Accurate radius and mass of the transiting exoplanet OGLE-TR-132b
C. Moutou, F. Pont, F. Bouchy +1
The exoplanet OGLE-TR-132b belongs to the new class of very hot giant planets, together with OGLE-TR-56b and OGLE-TR-113b, detected by their transits. Recently, radial velocity mea…
The HARPS search for southern extra-solar planets. XIII. A planetary system with 3 Super-Earths (4.2, 6.9, & 9.2 Earth masses)
M. Mayor, S. Udry, C. Lovis +7
This paper reports on the detection of a planetary system with three Super-Earths orbiting HD40307. HD40307 is a K2V metal-deficient star at a distance of only 13 parsec, part of t…
The HARPS search for southern extra-solar planets XXXV. The interesting case of HD41248: stellar activity, no planets?
N. C. Santos, A. Mortier, J. P. Faria +21
The search for planets orbiting metal-poor stars is of uttermost importance for our understanding of the planet formation models. However, no dedicated searches have been conducted…
The Stellar Dynamics of Omega Centauri
David Merritt, G. Meylan, M. Mayor
The stellar dynamics of Omega Centauri are inferred from the radial velocities of 469 stars measured with CORAVEL (Mayor et al. 1997). Rather than fit the data to a family of model…
SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs I. New atmospheric parameters and masses for 48 stars with planets
N. C. Santos, S. G. Sousa, A. Mortier +8
Due to the importance that the star-planet relation has to our understanding of the planet formation process, the precise determination of stellar parameters for the ever increasin…
A HARPS view on K2-3
J. M. Almenara, N. Astudillo-Defru, X. Bonfils +14
K2 space observations recently found that three super-Earths transit the nearby M dwarf K2-3. The apparent brightness and the small physical radius of their host star rank these pl…
WASP-3b: a strongly-irradiated transiting gas-giant planet
D. Pollacco, I. Skillen, A. Collier Cameron +43
We report the discovery of WASP-3b, the third transiting exoplanet to be discovered by the WASP and SOPHIE collaboration. WASP-3b transits its host star USNO-B1.0 1256-0285133 ever…
Hubble Space Telescope times-series photometry of the planetary transit of HD189733: no moon, no rings, starspots
F. Pont, R. L. Gilliland, C. Moutou +7
We monitored three transits of the giant gas planet around the nearby K dwarf HD 189733 with the ACS camera on the Hubble Space Telescope. The resulting very-high accuracy lightcur…
K2-263b: A 50-day period sub-Neptune with a mass measurement using HARPS-N
A. Mortier, A. S. Bonomo, V. M. Rajpaul +32
This paper reports on the validation and mass measurement of K2-263b, a sub-Neptune orbiting a quiet G9V star. Using K2 data from campaigns C5 and C16, we find this planet to have…
Spectroscopic binaries among Hipparcos M giants I. Data, orbits, and intrinsic variations
B. Famaey, D. Pourbaix, A. Frankowski +4
This paper is a follow-up of the vast effort to collect radial velocity data for stars belonging to the Hipparcos survey. We aim at extending the orbital data available for binarie…
On the Age of Stars Harboring Transiting Planets
C. Melo, N. C. Santos, F. Pont +5
Results of photometric surveys have brought to light the existence of a population of giant planets orbiting their host stars even closer than the hot Jupiters (HJ), with orbital p…
WASP-14b: 7.3 Mj transiting planet in an eccentric orbit
Y. C. Joshi, D. Pollacco, A. Collier Cameron +38
We report the discovery of a 7.3 Mjup exoplanet WASP-14b, one of the most massive transiting exoplanets observed to date. The planet orbits the tenth-magnitude F5V star USNO-B1 111…
WASP-7: The brightest transiting-exoplanet system in the Southern hemisphere
Coel Hellier, D. R. Anderson, M. Gillon +28
We report that a Jupiter-mass planet, WASP-7b, transits the V = 9.5 star HD197286 every 4.95 d. This is the brightest discovery from the WASP-South transit survey and the brightest…
On the functional form of the metallicity-giant planet correlation
A. Mortier, N. C. Santos, S. Sousa +3
It is generally accepted that the presence of a giant planet is strongly dependent on the stellar metallicity. A stellar mass dependence has also been investigated, but this depend…
An ultra-short period rocky super-Earth orbiting the G2-star HD 80653
G. Frustagli, E. Poretti, T. Milbourne +26
Ultra-short period (USP) planets are a class of exoplanets with periods shorter than one day. The origin of this sub-population of planets is still unclear, with different formatio…
The HARPS search for southern extra-solar planets XXXII. Only 4 planets in the Gl~581 system
T. Forveille, X. Bonfils, X. Delfosse +14
The Gl 581 planetary system has generated wide interest, because its 4 planets include both the lowest mass planet known around a main sequence star other than the Sun and the firs…
The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets
M. Mayor, M. Marmier, C. Lovis +11
We report on the results of an 8-year survey carried out at the La Silla Observatory with the HARPS spectrograph to detect and characterize planets in the super-Earth and Neptune m…
Multi-order TODCOR: application to observations taken with the CORALIE echelle spectrograph
S. Zucker, T. Mazeh, N. C. Santos +2
This paper presents an application of the TwO-Dimensional CORrelation (TODCOR) algorithm to multi-order spectra. The combination of many orders enables the detection and measuremen…
The HARPS search for southern extra-solar planets. X. A m sin i = 11 Mearth planet around the nearby spotted M dwarf GJ 674
X. Bonfils, M. Mayor, X. Delfosse +10
Context: How planet properties depend on stellar mass is a key diagnostic of planetary formation mechanisms. Aims: This motivates planet searches around stars which are significant…
The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
B. Nordstrom, M. Mayor, J. Andersen +6
We present and discuss new determinations of metallicity, rotation, age, kinematics, and Galactic orbits for a complete, magnitude-limited, and kinematically unbiased sample of 16,…
WASP-17b: an ultra-low density planet in a probable retrograde orbit
D. R. Anderson, C. Hellier, M. Gillon +18
We report the discovery of the transiting giant planet WASP-17b, the least-dense planet currently known. It is 1.6 Saturn masses but 1.5-2 Jupiter radii, giving a density of 6-14 p…
Spectroscopic [Fe/H] for 98 extra-solar planet-host stars: Exploring the probability of planet formation
N. C. Santos, G. Israelian, M. Mayor
We present stellar parameters and metallicities, obtained from a detailed spectroscopic analysis, for a large sample of 98 stars known to be orbited by planetary mass companions (a…
A super-Earth orbiting the nearby M-dwarf GJ 536
A. Suárez Mascareño, J. I. González Hernández, R. Rebolo +13
We report the discovery of a super-Earth orbiting the star GJ 536 based on the analysis of the radial-velocity time series from the HARPS and HARPS-N spectrographs. GJ 536 b is a p…
Elodie metallicity-biased search for transiting Hot Jupiters I. Two Hot Jupiters orbiting the slightly evolved stars HD118203 and HD149143
R. Da Silva, S. Udry, F. Bouchy +7
We report the discovery of a new planet candidate orbiting the subgiant star HD118203 with a period of P=6.1335 days. The best Keplerian solution yields an eccentricity e=0.31 and…
Li depletion in solar analogues with exoplanets: Extending the sample
E. Delgado Mena, G. Israelian, J. I. González Hernández +8
We want to study the effects of the formation of planets and planetary systems on the atmospheric Li abundance of planet host stars. In this work we present new determinations of l…
Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N and TESS
G. Lacedelli, T. G. Wilson, L. Malavolta +115
We present a precise characterization of the TOI-561 planetary system obtained by combining previously published data with TESS and CHEOPS photometry, and a new set of HARPS-N…
Dynamical stability analysis of the HD202206 system and constraints to the planetary orbits
J. Couetdic, J. Laskar, A. C. M. Correia +2
Long-term precise Doppler measurements with the CORALIE spectrograph revealed the presence of two massive companions to the solar-type star HD202206. Although the three-body fit of…
A new Neptune-mass planet orbiting HD 219828
C. Melo, N. C. Santos, W. Gieren +10
Two years ago a new benchmark for the planetary survey was set with the discoveries of three extrasolar planets with masses below 20. In particular, the serendipitous dis…
Evidence for a spectroscopic direct detection of reflected light from 51 Peg b
J. H. C. Martins, N. C. Santos, P. Figueira +11
The detection of reflected light from an exoplanet is a difficult technical challenge at optical wavelengths. Even though this signal is expected to replicate the stellar signal, n…
High resolution spectroscopy of stars with transiting planets. The cases of OGLE-TR-10, 56, 111, 113, and TrES-1
N. C Santos, F. Pont, C. Melo +7
Context: During the past years photometric surveys, later complemented by follow-up radial-velocity measurements, have revealed the presence of several new extra-solar transiting p…
Light elements in stars with exoplanets
N. C. Santos, E. Delgado Mena, G. Israelian +7
It is well known that stars orbited by giant planets have higher abundances of heavy elements when compared with average field dwarfs. A number of studies have also addressed the p…
Radial Velocities with CRIRES: Pushing precision down to 5-10 m/s
P. Figueira, F. Pepe, C. H. F. Melo +6
With the advent of high-resolution infrared spectrographs, Radial Velocity (RV) searches enter into a new domain. As of today, the most important technical question to address is w…
The Hyades stream: evaporated cluster or intrusion from the inner disk?
B. Famaey, F. Pont, X. Luri +3
The nature of the Hyades stream, or Hyades moving group, is a long-standing question of Galactic Astronomy. Is this stream caused by non-axisymmetric perturbations of the galactic…
Accurate masses of very low mass stars: III 16 new or improved masses
D. Ségransan, X. Delfosse, T. Forveille +4
We have obtained adaptive optics images and accurate radial velocities for 7 very low mass systems, in the course of a long term effort to determine accurate masses for very low ma…
Accurate masses of very low mass stars: II The very low mass triple system Gl 866
X. Delfosse, T. Forveille, S. Udry +3
We present very accurate orbital parameters and mass measurements (2.4% accuracy) for the well known very low mass triple system Gl 866. We obtain first orbital elements for the sh…
Coralie radial-velocity search for companions around evolved stars (CASCADES) III. A new Jupiter host-star: in-depth analysis of HD 29399 using TESS data
C. Pezzotti, G. Ottoni, G. Buldgen +11
Context. Increasing the number of detected exoplanets is far from anecdotal, especially for long-period planets that require a long duration of observation. More detections imply a…
The HARPS search for southern extrasolar planets XXV. Results from the metal-poor sample
N. C. Santos, M. Mayor, X. Bonfils +10
Searching for extrasolar planets around stars of different metallicity may provide strong constraints to the models of planet formation and evolution. In this paper we present the…
The CARMENES search for exoplanets around M dwarfs. Two terrestrial planets orbiting G 264-012 and one terrestrial planet orbiting Gl 393
P. J. Amado, F. F. Bauer, C. RodrÃguez López +51
We report the discovery of two planetary systems, namely G 264-012, an M4.0 dwarf with two terrestrial planets ( M and $M_{\rm c…
The HARPS search for southern extra-solar planets XXXV. Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543
N. Astudillo-Defru, X. Bonfils, X. Delfosse +13
Context. Planetary companions of a fixed mass induce larger amplitude reflex motions around lower-mass stars, which helps make M dwarfs excellent targets for extra-solar planet sea…
Exoplanet HD 209458b : Evaporation strengthened
A. Vidal-Madjar, A. Lecavelier des Etangs, J. -M. Desert +4
Following re-analysis of Hubble Space Telescope observations of primary transits of the extrasolar planet HD209458b at Lyman-alpha, Ben-Jaffel (2007, BJ007) claims that no sign of…
The SOPHIE search for northern extrasolar planets. XI. Three new companions and an orbit update: Giant planets in the habitable zone
R. F. DÃaz, J. Rey, O. Demangeon +25
We report the discovery of three new substellar companions to solar-type stars, HD191806, HD214823, and HD221585, based on radial velocity measurements obtained at the Haute-Proven…
The HARPS search for southern extra-solar planets. III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117
C. Lovis, M. Mayor, F. Bouchy +8
We report on the detection of three Saturn-mass planets discovered with the HARPS instrument. HD 93083 shows radial-velocity (RV) variations best explained by the presence of a com…
Differential image motion in astrometric observations with very large seeing-limited telescopes
P. F. Lazorenko, J. Sahlmann, M. Mayor +1
We investigate how to quantitatively model the observed differential image motion (DIM) in relative astrometric observations. As a test bed we used differential astrometric observa…
Elodie metallicity-biased search for transiting Hot Jupiters IV. Intermediate period planets orbiting the stars HD43691 and HD132406
R. Da Silva, S. Udry, F. Bouchy +21
We report here the discovery of two planet candidates as a result of our planet-search programme biased in favour of high-metallicity stars, using the ELODIE spectrograph at the Ob…
An accurate mass determination for Kepler-1655b, a moderately-irradiated world with a significant volatile envelope
R. D. Haywood, A. Vanderburg, A. Mortier +32
We present the confirmation of a small, moderately-irradiated (F = 155 +/- 7 Fearth) Neptune with a substantial gas envelope in a P=11.8728787+/-0.0000085-day orbit about a quiet,…
The HARPS search for southern extra-solar planets. XXXVI. Eight HARPS multi-planet systems hosting 20 super-Earth and Neptune-mass companions
S. Udry, X. Dumusque, C. Lovis +21
We present radial-velocity measurement of eight stars observed with the HARPS Echelle spectrograph mounted on the 3.6-m telescope in La Silla (ESO, Chile). Data span more than ten…
Radial velocity follow-up of GJ1132 with HARPS. A precise mass for planet 'b' and the discovery of a second planet
X. Bonfils, J. -M. Almenara, R. Cloutier +19
GJ1132 is a nearby red dwarf known to host a transiting Earth-size planet. After its initial detection, we pursued an intense follow-up with the HARPS velocimeter. We now confirm t…
Overabundance of alpha-elements in exoplanet host stars
V. Zh. Adibekyan, N. C. Santos, S. G. Sousa +6
We present the results for a chemical abundance analysis between planet-hosting and stars without planets for 12 refractory elements for a total of 1111 nearby FGK dwarf stars obse…
Misaligned spin-orbit in the XO-3 planetary system?
G. Hebrard, F. Bouchy, F. Pont +20
The transiting extrasolar planet XO-3b is remarkable, with a high mass and eccentric orbit. The unusual characteristics make it interesting to test whether its orbital plane is par…
WASP-4b: a 12th-magnitude transiting hot-Jupiter in the Southern hemisphere
D. M. Wilson, M. Gillon, C. Hellier +29
We report the discovery of WASP-4b, a large transiting gas-giant planet with an orbital period of 1.34 days. This is the first planet to be discovered by the SuperWASP-South observ…
The detection and characterisation of 54 massive companions with the SOPHIE spectrograph -- 7 new brown dwarfs and constraints on the BD desert
F. Kiefer, G. Hébrard, J. Sahlmann +35
Brown-dwarfs are substellar objects with masses intermediate between planets and stars within about 13-80Mjup. While isolated BDs are most likely produced by gravitational collapse…
A Mass for the Extrasolar Planet Gl 876b Determined from Hubble Space Telescope Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities
G. F. Benedict, B. E. McArthur, T. Forveille +9
We report the first astrometrically determined mass of an extrasolar planet, a companion previously detected by Doppler spectroscopy. Radial velocities first provided an ephemeris…
A Lack of Planets in 47 Tucanae from an HST Search
Ronald L. Gilliland, T. M. Brown, P. Guhathakurta +21
We report results from a large Hubble Space Telescope project to observe a significant (~34,000) ensemble of main sequence stars in the globular cluster 47 Tucanae with a goal of d…
The HARPS search for southern extra-solar planets. XXVII. Up to seven planets orbiting HD 10180: probing the architecture of low-mass planetary systems
C. Lovis, D. Ségransan, M. Mayor +11
Context. Low-mass extrasolar planets are presently being discovered at an increased pace by radial velocity and transit surveys, opening a new window on planetary systems. Aims. We…
Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program.Galactic stellar populations and planets
V. Zh. Adibekyan, S. G. Sousa, N. C. Santos +5
We performed a uniform and detailed abundance analysis of 12 refractory elements (Na, Mg, Al, Si, Ca, Ti, Cr, Ni, Co, Sc, Mn and V) for a sample of 1111 FGK dwarf stars from the HA…
Detection of a transit of the super-Earth 55 Cnc e with Warm Spitzer
B. -O. Demory, M. Gillon, D. Deming +12
We report on the detection of a transit of the super-Earth 55 Cnc e with warm Spitzer in IRAC's 4.5-micron band. Our MCMC analysis includes an extensive modeling of the systematic…
Detection of transits of the nearby hot Neptune GJ 436 b
M. Gillon, F. Pont, B. -O. Demory +7
This Letter reports on the photometric detection of transits of the Neptune-mass planet orbiting the nearby M-dwarf star GJ 436. It is by far the closest, smallest and least massiv…
The HARPS search for southern extra-solar planets: XIV. Gl 176b, a super-Earth rather than a Neptune, and at a different period
T. Forveille, X. Bonfils, X. Delfosse +10
A 10.24 days Neptune-mass planet was recently announced to orbit the nearby M2 dwarf Gl 176, based on 28 radial velocities measured with the HRS spectrograph on the Hobby-Heberly T…
Bisector analysis as a diagnostic of intrinsic radial-velocity variations
N. C. Santos, M. Mayor, D. Naef +2
In this contribution we present the results of the application of the bisector of the cross-correlation function as a diagnostic of activity-related radial-velocity variations. The…
Masses and radii for the three super-Earths orbiting GJ 9827, and implications for the composition of small exoplanets
K. Rice, L. Malavolta, A. Mayo +34
Super-Earths belong to a class of planet not found in the Solar System, but which appear common in the Galaxy. Given that some super-Earths are rocky, while others retain substanti…
The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles
R. F. DÃaz, D. Ségransan, S. Udry +22
We present the analysis of the entire HARPS observations of three stars that host planetary systems: HD1461, HD40307, and HD204313. The data set spans eight years and contains more…
Search For Exospheric Signatures From Transiting Planets
N. Iro, A. Coustenis, C. Moutou +3
We searched for spectral signatures from the exosphere of HD209458 in the UV and the near-IR with UVES and ISAAC at the VLT. We looked in particular for the helium absorption featu…
Comparing HARPS and Kepler surveys: The alignment of multiple-planet systems
P. Figueira, M. Marmier, G. Boué +6
Aims. We study a subset of the planetary population characterized both by HARPS and Kepler surveys. We compare the statistical properties of planets in systems with m.sin i >5-10 M…
The HARPS search for southern extra-solar planets. XX. Planets around the active star BD-08:2823
G. Hebrard, S. Udry, G. Lo Curto +13
We report the detection of a planetary system around BD-08:2823, that includes at least one Uranus-mass planet and one Saturn-mass planet. This discovery serendipitously originates…
The SOPHIE search for northern extrasolar planets. V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars
I. Boisse, F. Pepe, C. Perrier +21
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…
WASP-22 b: A transiting "hot Jupiter" planet in a hierarchical triple system
P. F. L. Maxted, D. R. Anderson, M. Gillon +21
We report the discovery of a transiting planet orbiting the star TYC 6446-326-1. The star, WASP-22, is a moderately bright (V=12.0) solar-type star (Teff = 6000 +/- 100 K, [Fe/H] =…
Spectroscopic binaries among Hipparcos M giants II. Binary frequency
A. Frankowski, B. Famaey, S. Van Eck +3
This paper is the second one in a series devoted to the study of properties of binaries involving M giants. The binary frequency of field M giants is derived and compared with the…
A hot Uranus transiting the nearby M dwarf GJ3470. Detected with HARPS velocimetry. Captured in transit with TRAPPIST photometry
X. Bonfils, M. Gillon, S. Udry +15
We report on the discovery of GJ3470b, a transiting hot Uranus of mass m_p = 14.0+-1.8 Mearth, radius R_p = 4.2+-0.6 Rearth and period P=3.3371+-0.0002 day. Its host star is a near…
Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b
C. Moutou, G. Hebrard, F. Bouchy +19
We report the detection of the primary transit of the extra-solar planet HD 80606 b, thanks to photometric and spectroscopic observations performed at Observatoire de Haute-Provenc…
The CORALIE survey for southern extra-solar planets XV. Discovery of two eccentric planets orbiting HD4113 and HD156846
O. Tamuz, D. Ségransan, S. Udry +10
We report the detection of two very eccentric planets orbiting HD4113 and HD156846 with the CORALIE Echelle spectrograph mounted on the 1.2-m Euler Swiss telescope at La Silla. The…
C, S, Zn and Cu abundances in planet-harbouring stars
A. Ecuvillon, G. Israelian, N. C. Santos +3
We present a detailed and uniform study of C, S, Zn and Cu abundances in a large set of planet host stars, as well as in a homogeneous comparison sample of solar-type dwarfs with n…