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Publications (184)
Context. To mimic the evolution of protoplanetary discs (PPDs), 2D simulations that incorporate self-gravity must introduce a softening prescription of the gravitational potential. When the disc is only composed of gas, the smoothing length is proportional to the scale height of the gas. On the other hand, when a dust component is included, the que...
To mimic protoplanetary discs (PPDs) evolution, 2D simulations with self-gravity must introduce a softening prescription of the gravitational potential. When the disc is only made of gas the smoothing length is proportional to the gas scale height. On the other hand when a dust component is included, the question arises as whether the smoothing len...
Context. Theoretical and numerical studies have shown that large-scale vortices in protoplanetary discs can result from various hydro-dynamical instabilities. Once produced, such vortices can survive nearly unchanged over a large number of rotation periods, slowly migrating towards the star. Lopsided asymmetries recently observed at sub-millimetre...
The diversity of the structures recently observed in protoplanetary discs (PPDs) with the new generation of high-resolution instruments have made more acute the challenging questions that planet-formation models must answer. The challenge is in the theoretical side but also in the numerical one with the need to significantly improve the performance...
Theoretical and numerical studies have shown that large-scale vortices in Protoplanetary discs can result from various hydrodynamical instabilities. Once produced, such vortices can survive nearly unchanged over a large number of rotation periods, slowly migrating towards the star. In the outer disc, self-gravity may affect the vortex evolution and...
SPHERE (Beuzit et al,. 2019) has now been in operation at the VLT for more than 5 years, demonstrating a high level of performance. SPHERE has produced outstanding results using a variety of operating modes, primarily in the field of direct imaging of exoplanetary systems, focusing on exoplanets as point sources and circumstellar disks as extended...
We study dust concentration and emission within vortices in protoplanetary disks. We extend the Lyra-Lin solution for the dust concentration of a single grain size to a power-law distribution of grain sizes $n(a) \propto a^{-p}$. Assuming dust conservation in the disk, we find an analytic dust surface density as a function of the grain radius. We c...
Context. Large-scale vortices in protoplanetary disks are thought to form and survive for long periods of time. Hence, they can significantly change the global disk evolution and particularly the distribution of the solid particles embedded in the gas, possibly explaining asymmetries and dust concentrations recently observed at submillimeter and mi...
This paper investigates the evolution of the solid component of a
protoplanetary disk in which the gas flows in a non-axisymmetric way due
to persistent large-scale structures such as giant vortices or spiral
patterns. The dynamics of the particles, submitted to the gravity of the
central star and to the gas drag, is studied through numerical
integ...
Large scale vortices could play a key role in the evolution of protoplanetary disks, particularly in the dead-zone where no turbulence associated with magnetic field is expected. Their possible formation by the subcritical baroclinic instability is a complex issue due to the vertical structure of the disk and to the elliptical instability.} {In two...
Aims. We determine the size, structure, and evolution of persistent vortices in 2D and inviscid Keplerian flows. Methods. A Gaussian model of the vortices is built and compared with numerical solutions issued from non-linear hydrodynamical simulations. Test vortices are also produced using a fiducial method based on the Rossby wave instability to h...
Context. We present the discovery of two transiting extrasolar planets by the
satellite CoRoT. Aims. We aim at a characterization of the planetary bulk
parameters, which allow us to further investigate the formation and evolution
of the planetary systems and the main properties of the host stars. Methods. We
used the transit light curve to characte...
The CoRoT satellite has provided high-precision photometric light curves for more than 163 000 stars and found several hundreds of
transiting systems compatible with a planetary scenario. If ground-based velocimetric observations are the best way to identify
the actual planets among many possible configurations of eclipsing binary systems, recent t...
We present the discovery of a candidate multiply-transiting system, the first
one found in the CoRoT mission. Two transit-like features with periods of 5.11
and 11.76d are detected in the CoRoT light curve, around a main sequence K1V
star of r=15.1. If the features are due to transiting planets around the same
star, these would correspond to object...
Although petrologic, chemical and isotopic studies of ordinary chondrites and
meteorites in general have largely helped establish a chronology of the
earliest events of planetesimal formation and their evolution, there are
several questions that cannot be resolved via laboratory measurements and/or
experiments only. Here we propose rationale for se...
Ordinary chondrite meteorites (OCs) are by far the most abundant
meteorites (80% of all falls). Their study along with that of other
chondrite classes has provided numerous constraints on the formation and
early evolution of the solar system, including a) the migration
processes that occurred in the protoplanetary disk prior to primary
accretion (i...
Large-scale persistent vortices are known to form easily in 2D disks via the
Rossby wave or the baroclinic instability. In 3D, however, their formation and
stability is a complex issue and still a matter of debate. We study the
formation of vortices by the Rossby wave instability in a stratified inviscid
disk and describe their three dimensional st...
Three dimensional compressible simulations of the Rossby Wave
Instability are presented in a non-homentropic model of protoplanetary
disk. The instability develops like in the two dimensional case,
gradually coming to the formation of a single big vortex. This 3D vortex
has a quasi-2D structure which looks like a vorticity column with only
tiny ver...
The occurrence of the baroclinic instability in protoplanetary disks is
investigated using fully compressible numerical simulations. We study
the role of disk stratification and heat transfer in the development of
the instability. Vortices are found to form whatever the importance of
the stratification but to grow and persist only when the disk is...
The evolution of 2D vortices is studied in the case of an adiabatic
disk. A new vortex model is derived using a gaussian assumption and
tested against numerical solutions. This model is compared with previous
ones and used as an initial solution for an accurate second order
numerical method. Three parameters are necessary to constrain the model:
th...
Aims. We report the discovery of CoRoT-16b, a low density hot jupiter that orbits a faint G5V star (mV = 15.63) in 5.3523 +/- 0.0002 days with slight eccentricity. A fit of the data with no a priori assumptions on the orbit leads to an eccentricity of 0.33 +/- 0.1. We discuss this value and also derive the mass and radius of the planet. Methods. We...
CoRoT is a space telescope which aims at studying internal structure of stars and detecting extrasolar planets. We present here a list of transits detected in the light curves of stars observed by CoRoT in two fields in the anti-center direction: the LRa03 one observed during 148 days from 3 October 2009 to 1 March 2010 followed by the SRa03 one fr...
We report the discovery by the CoRoT space mission of a new giant
planet, CoRoT-20b. The planet has a mass of 4.24 ± 0.23
MJup and a radius of 0.84 ± 0.04 RJup. With
a mean density of 8.87 ± 1.10 g cm-3, it is among the
most compact planets known so far. Evolutionary models for the planet
suggest a mass of heavy elements of the order of 800 M⊕
if e...
This contribution describes the evolution of the protoplanetary disk using 2D
numerical simulations. The 2D Euler equations are solved with the finite volume
method. The numerical simulations are used to study the persistence and
migration of anticyclonic vortices. Two cases are presented : (1) vortices
produced by the Rossby Waves Instability, (2)...
We report the detection of CoRoT-23b, a hot Jupiter transiting in front of its host star with a period of 3.6314 \pm 0.0001 days. This planet was discovered thanks to photometric data secured with the CoRoT satellite, combined with spectroscopic radial velocity (RV) measurements. A photometric search for possible background eclipsing binaries condu...
Observations of transiting extrasolar planets are of key importance to our
understanding of planets because their mass, radius, and mass density can be
determined. The CoRoT space mission allows us to achieve a very high
photometric accuracy. By combining CoRoT data with high-precision radial
velocity measurements, we derive precise planetary radii...
We report the detection of CoRoT-23b, a hot Jupiter transiting in front of
its host star with a period of 3.6314 \pm 0.0001 days. This planet was
discovered thanks to photometric data secured with the CoRoT satellite,
combined with spectroscopic radial velocity (RV) measurements. A photometric
search for possible background eclipsing binaries condu...
The mass of CoRoT-7b, the first transiting super-Earth exoplanet, is still a subject of debate. A wide range of masses have been reported in the literature ranging from as high as 8 M ⊕ to as low as 2.3 M ⊕. This range in mass is largely due to the activity level of the star that contributes a significant amount of radial velocity (RV) "jitter" and...
Context: CoRoT is a pioneering space mission whose primary goals are stellar
seismology and extrasolar planets search. Its surveys of large stellar fields
generate numerous planetary candidates whose lightcurves have transit-like
features. An extensive analytical and observational follow-up effort is
undertaken to classify these candidates. Aims: T...
We report the discovery by the CoRoT space mission of a transiting brown dwarf orbiting a F7V star with an orbital period of 3.06 days. CoRoT-15b has a radius of 1.12 +0.30 −0.15 R Jup and a mass of 63.3 ± 4.1 M Jup , and is thus the second transiting companion lying in the theoretical mass domain of brown dwarfs. CoRoT-15b is either very young or...
This paper presents the case of CoRoT LRa02_E2_0121, which was initially
classified as a Neptune-size transiting-planet candidate on a relatively wide
orbit of 36.3 days. Follow-up observations were performed with UVES, Sandiford,
SOPHIE and HARPS. These observations revealed a faint companion in the spectra.
To find the true nature of the system w...
We report the detection of CoRoT-18b, a massive hot jupiter transiting in
front of its host star with a period of 1.9000693 +/- 0.0000028 days. This
planet was discovered thanks to photometric data secured with the CoRoT
satellite combined with spectroscopic and photometric ground-based follow-up
observations. The planet has a mass M_p = 3.47 +/- 0...
We report on the discovery of a hot Jupiter-type exoplanet, CoRoT-17b,
detected by the CoRoT satellite. It has a mass of $2.43\pm0.30$\Mjup and a
radius of $1.02\pm0.07$\Rjup, while its mean density is $2.82\pm0.38$ g/cm$^3$.
CoRoT-17b is in a circular orbit with a period of $3.7681\pm0.0003$ days. The
host star is an old ($10.7\pm1.0$ Gyr) main-se...
The search for rocky exoplanets plays an important role in our quest for
extra-terrestrial life. Here, we discuss the extreme physical properties
possible for the first characterized rocky super-Earth, CoRoT-7b (R_pl = 1.58
\pm 0.10 R_Earth, Mpl = 6.9 \pm 1.2 M_Earth). It is extremely close to its star
(a = 0.0171 AU = 4.48 R_st), with its spin and...
In this paper, the CoRoT Exoplanet Science Team announces its 14th discovery.
Herein, we discuss the observations and analyses that allowed us to derive the
parameters of this system: a hot Jupiter with a mass of $7.6 \pm 0.6$ Jupiter
masses orbiting a solar-type star (F9V) with a period of only 1.5 d, less than
5 stellar radii from its parent star...
Aims. The CoRoT space mission continues to photometrically monitor about 12 000 stars in its field-of-view for a series of target fields to search for transiting extrasolar planets ever since 2007. Deep transit signals can be detected quickly in the "alarm-mode" in parallel to the ongoing target field monitoring. CoRoT's first planets have been det...
The CoRoT space observatory is a project which is led by the French space agency CNES and leading space research institutes in Austria, Brazil, Belgium, Germany and Spain and also the European Space Agency ESA. CoRoT observed since its launch in December 27, 2006 about 100 000 stars for the exoplanet channel, during 150 days uninterrupted high-prec...
We report the discovery by the CoRoT space mission of a transiting brown
dwarf orbiting a F7V star with an orbital period of 3.06 days. CoRoT-15b has a
radius of 1.12 +0.30 -0.15 Rjup, a mass of 63.3 +- 4.1 Mjup, and is thus the
second transiting companion lying in the theoretical mass domain of brown
dwarfs. CoRoT-15b is either very young or infla...
The CoRoT exoplanet science team announces the discovery of CoRoT-11b, a fairly massive hot-Jupiter transiting a V=12.9 mag F6 dwarf star (M*=1.27 +/- 0.05 Msun, R*=1.37 +/- 0.03 Rsun, Teff=6440 +/- 120 K), with an orbital period of P=2.994329 +/- 0.000011 days and semi-major axis a=0.0436 +/- 0.005 AU. The detection of part of the radial velocity...
We report the discovery of CoRoT-8b, a dense small Saturn-class exoplanet that orbits a K1 dwarf in 6.2 days, and we derive its orbital parameters, mass, and radius. We analyzed two complementary data sets: the photometric transit curve of CoRoT-8b as measured by CoRoT and the radial velocity curve of CoRoT-8 as measured by the HARPS spectrometer....
Light curves in the CoRoT white, blue, green, and red channels. The
CoRoT bands are not simply related to any standard photometric systems.
Because the applied corrections are channel-specific, the flux in the
white channel is not the exact sum of the blue, green, and red fluxes.
Also provided are the radial velocity measurements by the SOPHIE and...
We announce the discovery of the transiting planet CoRoT-13b. Ground based follow-up in CFHT and IAC80 confirmed CoRoT's observations. The mass of the planet was measured with the HARPS spectrograph and the properties of the host star were obtained analyzing HIRES spectra from the Keck telescope. It is a hot Jupiter-like planet with an orbital peri...
The CoRoT satellite has recently discovered a hot Jupiter that transits across the disc of a F9V star called CoRoT-6 with a period of 8.886 days. We model the photospheric activity of the star and use the maps of the active regions to study stellar differential rotation and the star-planet interaction. We apply a maximum entropy spot model to fit t...
We report the discovery by the CoRoT satellite of a new transiting giant
planet in a 2.83 days orbit about a V=15.5 solar analog star (M_* = 1.08 +-
0.08 M_sun, R_* = 1.1 +- 0.1 R_sun, T_eff = 5675 +- 80 K). This new planet,
CoRoT-12b, has a mass of 0.92 +- 0.07 M_Jup and a radius of 1.44 +- 0.13 R_Jup.
Its low density can be explained by standard...
The space telescope CoRoT searches for transiting extrasolar planets by
continuously monitoring the optical flux of thousands of stars in several
fields of view. We report the discovery of CoRoT-10b, a giant planet on a
highly eccentric orbit (e=0.53 +/- 0.04) revolving in 13.24 days around a faint
(V=15.22) metal-rich K1V star. We use CoRoT photom...
The CoRoT satellite has recently discovered the transits of a telluric planet across the disc of a late-type magnetically active star dubbed CoRoT-7, while a second planet has been detected after filtering out the radial velocity (hereafter RV) variations due to stellar activity. We investigate the magnetic activity of CoRoT-7 and use the results f...
Based on observations obtained with CoRoT, a space project operated by the French Space Agency, CNES, with participation of the Science Programme of ESA, ESTEC/RSSD, Austria, Belgium, Brazil, Germany and Spain.
Of the over 400 known exoplanets, there are about 70 planets that transit their central star, a situation that permits the derivation of their basic parameters and facilitates investigations of their atmospheres. Some short-period planets, including the first terrestrial exoplanet (CoRoT-7b), have been discovered using a space mission designed to f...
Surveys for exoplanetary transits are usually limited not by photon noise but
rather by the amount of red noise in their data. In particular, although the
CoRoT spacebased survey data are being carefully scrutinized, significant new
sources of systematic noises are still being discovered. Recently, a
magnitude-dependant systematic effect was discov...
Context. CoRoT, the pioneer space-based transit search, steadily provides thousands of high-precision light curves with continuous time sampling over periods of up to 5 months. The transits of a planet perturbed by an additional object are not strictly periodic. By studying the transit timing variations (TTVs), additional objects can be detected in...
Of the over 400 known^1 exoplanets, there are about 70 planets that
transit their central star, a situation that permits the derivation of
their basic parameters and facilitates investigations of their atmospheres.
Some short-period planets^2, including the first terrestrial
exoplanet^(3,4) (CoRoT-7b), have been discovered using a space mission^5
d...
The CoRoT satellite exoplanetary team announces its sixth transiting planet
in this paper. We describe and discuss the satellite observations as well as
the complementary ground-based observations - photometric and spectroscopic -
carried out to assess the planetary nature of the object and determine its
specific physical parameters. The discovery...
Context. The space telescope CoRoT searches for transiting extrasolar planets by continuously monitoring the optical flux of thousands of stars in several fields of view. Aims. We report the discovery of CoRoT-10b, a giant planet on a highly eccentric orbit (e = 0.53 ± 0.04) revolving in 13.24 days around a faint (V = 15.22) metal-rich K1V star. Me...
Context. CoRoT, the pioneer space-based transit search, steadily provides thousands of high-precision light curves with continuous time sampling over periods of up to 5 months. The transits of a planet perturbed by an additional object are not strictly periodic. By studying the transit timing variations (TTVs), additional objects can be detected in...
The 11408 targets observed by CoRoT were selected using the information
gathered in the database Exo-Dat (Deleuil et al. 2009AJ....138..649D;
Meunier et al. 2007, ASP Conf., 376, 339), built with dedicated ground
based photometric observations in the visible and near IR bands from
2MASS catalog.
(1 data file).
The up to 150 day uninterrupted high-precision photometry of about 100000 stars - provided so far by the exoplanet channel of the CoRoT space telescope - gave a new perspective on the planet population of our galactic neighbourhood. The seven planets with very accurate parameters widen the range of known planet properties in almost any respect. Gia...
Copyright © The European Southern Observatory (ESO) Aims. We report the discovery of very shallow (ΔF/F ≈ 3.4×10−4), periodic dips in the light curve of an active V = 11.7 G9V star observed by the CoRoT satellite, which we interpret as caused by a transiting companion. We describe the 3-colour CoRoT data and complementary ground-based observations...
Copyright © The European Southern Observatory (ESO) The transiting planet CoRoT-1b is thought to belong to the pM-class of planets, in which the thermal emission dominates in the optical wavelengths. We present a detection of its secondary eclipse in the CoRoT white channel data, whose response function goes from ~400 to ~1000 nm. We used two diffe...
Copyright © The European Southern Observatory (ESO) Aims. We present here the list of planetary transit candidates detected in the first long run observed by CoRoT: LRc01, towards the galactic center in the direction of Aquila, which lasted from May to October 2007. Methods. we analyzed 3719 (33%) sources in the chromatic bands and 7689 in the mono...
We present radial-velocity sequences acquired during three transits of
the exoplanet HD 189733b and one transit of CoRoT-3b. We applied a
combined Markov-chain Monte-Carlo analysis of spectroscopic and
photometric data on these stars, to determine a full set of system
parameters including the projected spin-orbit misalignment angle of HD
189733b to...
Copyright © The European Southern Observatory (ESO) With the release of CoRoT lightcurves of the Initial Run IRa01, 50 transiting planetary candidates have been published in a companion paper. About twenty of them were identified as binary stars from the CoRoT lightcurve itself. Complementary observations were conducted for 29 candidates, including...
The space experiment CoRoT has recently detected a transiting hot Jupiter in
orbit around a moderately active F-type main-sequence star (CoRoT-Exo-4a). This
planetary system is of particular interest because it has an orbital period of
9.202 days, the second longest one among the transiting planets known to date.
We study the surface rotation and t...
We report on an intensive observational campaign carried out with HARPS at the 3.6 m telescope at La Silla on the star CoRoT-7. Additional simultaneous photometric measurements carried out with the Euler Swiss telescope have demonstrated that the observed radial velocity variations are dominated by rotational modulation from cool spots on the stell...
In this short paper, we study the photometric precision of stellar light curves obtained by the CoRoT satellite in its planet-finding channel, with a particular emphasis on the time scales characteristic of planetary transits. Together with other articles in the same issue of this journal, it forms an attempt to provide the building blocks for a st...
First, a simple pre-whitening procedure was employed to find and
subsequently remove periodic signals from the complex frequency
structure of the radial velocity data. The dominant frequency in the
power spectrum was found at 23 days, which corresponds to the rotation
period of CoRoT-7. The 0.8535 day period of CoRoT-7b planetary candidate
was dete...
As a planet eclipses its parent star, a dark spot on the surface of the star may be occulted, causing a detectable variation in the light curve. A total of 77 consecutive transit light curves of CoRoT-2 were observed with a high temporal resolution of 32 s, corresponding to an uninterrupted period of 134 days. By analyzing small intensity variation...
Aims. The CoRoT space mission continues to photometrically monitor about 12 000 stars in its field-of-view for a series of target fields to search for transiting extrasolar planets ever since 2007. Deep transit signals can be detected quickly in the "alarm-mode" in parallel to the ongoing target field monitoring. CoRoT's first planets have been det...
Aims. We report the discovery of very shallow ($\Delta F/F \approx 3.4\times 10^{-4}$), periodic dips in the light curve of an active $V = 11.7$ G9V star observed by the CoRoT satellite, which we interpret as caused by a transiting companion. We describe the 3-colour CoRoT data and complementary ground-based observations that support the planetary...
Copyright © The European Southern Observatory (ESO) Context. The CoRoT satellite searches for planets by applying the transit method, monitoring up to 12,000 stars in the galactic plane for 150 days in each observing run. This search is contaminated by a large fraction of false positives, caused by different eclipsing binary configurations that mig...
We report the discovery of very shallow (DF/F = 3.4 10-4), periodic dips in the light curve of an active V = 11.7 G9V star observed by the CoRoT satellite, which we interpret as due to the presence of a transiting companion. We describe the 3-colour CoRoT data and complementary ground-based observations that support the planetary nature of the comp...
Context: CoRoT is a pioneering space mission devoted to the analysis of stellar variability and the photometric detection of extrasolar planets. Aims: We present the list of planetary transit candidates detected in the first field observed by CoRoT, IRa01, the initial run toward the Galactic anticenter, which lasted for 60 days. Methods: We analyse...
Copyright © The European Southern Observatory (ESO) This paper presents an analysis that searched for systematic effects within the CoRoT exoplanet field light curves. The analysis identified a systematic effect that modified the zero point of most CoRoT exposures as a function of stellar magnitude. We could find this effect only after preparing a...
We present a study of the light curve of the transiting exoplanet CoRoT-2b, aimed at detecting the secondary eclipse and measuring its depth. The data were obtained with the CoRoT satellite during its first run of more than 140 days. After filtering the low frequencies with a pre-whitening technique, we detect a 0.0060$\pm$0.0020% secondary eclipse...
Towards the end of their lives, stars like the Sun greatly expand to become red giant stars. Such evolved stars could provide stringent tests of stellar theory, as many uncertainties of the internal stellar structure accumulate with age. Important examples are convective overshooting and rotational mixing during the central hydrogen-burning phase,...
CoRoT-2a is a young (about 0.5 Gyr) G7V star accompanied by a transiting hot-Jupiter, discovered by the CoRoT satellite (Alonso et al. 2008; Bouchy et al. 2008). An analysis of its photospheric activity, based on spot modelling techniques previously developed by our group for the analysis of the Sun as a star, shows that the active regions on CoRoT...
The CoRoT space mission routinely provides high-precision photometric
measurements of thousands of stars that have been continuously observed
for months. The discovery and characterization of the first very massive
transiting planetary companion with a short orbital period is reported.
A series of 34 transits was detected in the CoRoT light curve o...
In this short paper, we study the photometric precision of stellar light
curves obtained by the CoRoT satellite in its planet finding channel, with a
particular emphasis on the timescales characteristic of planetary transits.
Together with other articles in the same issue of this journal, it forms an
attempt to provide the building blocks for a sta...
Copyright © The European Southern Observatory (ESO) Context. The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoTExo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 Gyr. Aims. We present a spot modelling of the optical variability of the star du...
Context. The space experiment CoRoT has recently detected transits by a hot Jupiter across the disc of an active G7V star (CoRoT-Exo-2a) that can be considered as a good proxy for the Sun at an age of approximately 0.5 Gyr.Aims. We present a spot modelling of the optical variability of the star during 142 days of uninterrupted observations performe...
This paper presents an analysis that searched for systematic effects within the CoRoT exoplanet field light curves. The analysis identified a systematic effect that modified the zero point of most CoRoT exposures as a function of stellar magnitude. We could find this effect only after preparing a set of learning light curves that were relatively fr...
We propose that the large photometric variations of KH 15D are due to an eclipsing swarm of solid particles, trapped in a giant gaseous vortex rotating at ~0.2 AU from the star. The efficiency of the capture-in-vortex mechanism easily explains the observed large optical depth. The weaker opacity at mid-eclipse is consistent with a size segregation...
We present a preliminary analysis of the photospheric activity of CoRoT-Exo-2a, a young G7V star accompanied by a transiting hot Jupiter recently discovered by CoRoT. We apply spot modelling techniques developed for the analysis of the Sun as a star and capable to extract from CoRoT high precision light curves information on the variation of the to...
CoRoT, the first space-based transit search, provides ultra-high-precision light curves with continuous time-sampling over periods of up to 5 months. This allows the detection of transiting planets with relatively long periods, and the simultaneous study of the host star's photometric variability. In this Letter, we report the discovery of the tran...
CoRoT (Convection, Rotation and planetary Transits) is a satellite mission led by CNES. CoRot has been successfully launched on December 27th of 2006. One of its goals is to discover new exo-planets using the transit method. It observes stars and sample their emission light every 512 seconds leading to observing runs of 12000 light curves over a 6...
Copyright © The European Southern Observatory (ESO) CoRoT, the first space-based transit search, provides ultra-high-precision light curves with continuous time-sampling over periods of up to 5 months. This allows the detection of transiting planets with relatively long periods, and the simultaneous study of the host star’s photometric variability....
The CoRoT satellite has announced its fourth transiting planet (Aigrain et al. 2008) with space photometry. We describe and analyse complementary observations of this system performed to establish the planetary nature of the transiting body and to estimate the fundamental parameters of the planet and its parent star. We have analysed high precision...