Improved stellar parameters of CoRoT-7 A star hosting two super Earths

  title={Improved stellar parameters of CoRoT-7 A star hosting two super Earths},
  author={Hans Bruntt and Magali Deleuil and Malcolm Fridlund and Roi Alonso and François Bouchy and A. P. Hatzes and Michel Mayor and Claire Moutou and Didier Queloz},
  journal={Astronomy and Astrophysics},
Context. Accurate parameters of the host stars of exoplanets are needed for interpreting the new planetary systems. The CoRoT satellite recently discovered a transiting rocky planet with a density similar to the inner planets in our solar system, a so-called super Earth. The mass was determined using ground-based follow-up spectroscopy, which also revealed a second, non-transiting super Earth. Aims. These planets are orbiting a relatively faint (m(V) = 11.7) G9V star called CoRoT-7. We wish to… 

The corona and companion of CoRoT-2a. Insights from X-rays and optical spectroscopy

CoRoT-2 is one of the most unusual planetary systems known to date. Its host star is exceptionally active, showing a pronounced, regular pattern of optical variability caused by magnetic activity.

Homogeneous studies of transiting extrasolar planets – IV. Thirty systems with space-based light curves

I calculate the physical properties of 32 transiting extrasolar planet and brown-dwarf systems from existing photometric observations and measured spectroscopic parameters. The systems studied

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Context. Due to the star activity, the masses of CoRoT-7b and CoRoT 7c are uncertain. Investigators of the CoRoT team have proposed several solutions, all but one of them larger than the initia l

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Abstract Since the discovery of the transiting Super-Earth CoRoT-7b, several investigations have been made of the number and precise masses of planets present in the system, but they all yield

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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

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High-energy irradiation of exoplanets has been identified to be a key influence on the stability of these planets’ atmospheres. So far, irradiation-driven mass-loss has been observed only in two Hot

Constraints on the exosphere of CoRoT-7b

Context. The small radius and high density of CoRoT-7b implies that this transiting planet belongs to a different species than all transiting planets previously found. Current models suggest that

Application to Observations of Planet-Hosting Stars

In this chapter, I present the work I have done towards characterising three planetary systems: CoRoT-7, Kepler-78 and Kepler-10. CoRoT-7 is an active star host to a small hot Neptune and the first

Constraints on Super-Earths Interiors from Stellar Abundances

Modeling the interior of exoplanets is essential to go further than the conclusions provided by mean density measurements. In addition to the still limited precision on the planets’ fundamental



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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 ‐

Accurate fundamental parameters of CoRoT asteroseismic targets - The solar-like stars HD 49933, HD 175726, HD 181420, and HD 181906

Context. The CoRoT satellite has provided high-quality light curves of several solar-like stars. Analysis of these light curves provides oscillation frequencies that make it possible to probe the

The CoRoT-7 planetary system: two orbiting super-Earths

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

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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

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Aims. We report the discovery as well as the orbital and physical characterizations of two new transiting giant exoplanets, CoRoT-30 b and CoRoT-31 b, with the CoRoT space telescope. Methods. We

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One of the goals of the ground-based support program for the  and / satellite missions is to charac- terize suitable target stars for the part of the missions dedicated to

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Context. The CoRoT  space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months. Aims. The discovery and


The NASA Kepler mission is designed to find planets through transits. Accurate and precise radii of the detected planets depend on knowing the radius of the host star accurately, which is difficult