Publications by authors named "Thierry Forveille"
Ultrashort-period (USP) exoplanets have orbital periods shorter than 1 day. Precise masses and radii of USP exoplanets could provide constraints on their unknown formation and evolution processes. We report the detection and characterization of the USP planet GJ 367b using high-precision photometry and radial velocity observations.
View Article and Find Full Text PDFM dwarf stars, which have masses less than 60 per cent that of the Sun, make up 75 per cent of the population of the stars in the Galaxy. The atmospheres of orbiting Earth-sized planets are observationally accessible via transmission spectroscopy when the planets pass in front of these stars. Statistical results suggest that the nearest transiting Earth-sized planet in the liquid-water, habitable zone of an M dwarf star is probably around 10.
View Article and Find Full Text PDFM-dwarf stars--hydrogen-burning stars that are smaller than 60 per cent of the size of the Sun--are the most common class of star in our Galaxy and outnumber Sun-like stars by a ratio of 12:1. Recent results have shown that M dwarfs host Earth-sized planets in great numbers: the average number of M-dwarf planets that are between 0.5 to 1.
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- A decade ago, the detection of the first transiting extrasolar planet allowed scientists to begin studying the atmospheres of these planets, particularly targeting nearby small stars with favorable planet-to-star size ratios.
- Researchers discovered a category of planets called super-Earths, which have minimum masses between 1.9 to 10 times that of Earth, with the first real composition data coming from a planet named CoRoT-7b.
- The newly observed planet GJ 1214b, with a mass of 6.55 times that of Earth and a larger radius, is thought to consist mainly of water and has a thin hydrogen-helium atmosphere, making it a good candidate for atmospheric studies due to its proximity.
Understanding how cool stars produce magnetic fields within their interiors is crucial for predicting the impact of such fields, such as the activity cycle of the Sun. In this respect, studying fully convective stars enables us to investigate the role of convective zones in magnetic field generation. We produced a magnetic map of a rapidly rotating, very-low-mass, fully convective dwarf through tomographic imaging from time series of spectropolarimetric data.
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