Lines of research: Exoplanetary Systems & Solar System (SEYSS)
Exoplanetary Systems & Solar System (SEYSS)
The area of planetary and solar systems involves several research groups working on Exoplanets, Solar System and Cultural Astronomy.Our main objectives are:
The detection and characterization of giant and rocky planets around nearby stars using the most advanced instruments (CARMENES, ESPRESSO, HARPS Norte y Sur, SONG, LCO, MUSCAT2) and space missions (CoRoT, Kepler K2, CHEOPS, TESS and PLATO). The group is particularly interested in the study of terrestrial planets in the habitable zone of their host stars where water can be in liquid form.
The characterization of the atmospheres of planets to know their structure and composition, both by transits and direct imaging, using ground-based telescopes such as GTC and space missions such as CHEOPS.
Investigate the formation of exoplanet systems by studying the chemical composition of planet host stars, and the dynamical evolution of exoplanets at their early stages of formation.
Study the physical properties of different families of minor bodies of the Solar System (asteroids, comets, trans-neptunian objects, etc.) to understand the origin and evolution of Solar System with GTC and space missions such as OSIRIS-REx.
The study of ancient cosmologies through cultural astronomy and the defense of cultural heritage through the astronomy.
Polarisation of very-low-mass stars and brown dwarfs. I. VLT/FORS1 optical observations of field ultra-cool dwarfs
Context: Ultra-cool dwarfs of the L spectral type (T_eff = 1400-2200 K) are known to have dusty atmospheres. Asymmetries of the dwarf surface may arise from...
Possible ring material around centaur (2060) Chiron
We propose that several short-duration events observed in past stellar occultations by Chiron were produced by ring material. Some similarities between these...
Post-arrival calibration of Hayabusa2's optical navigation cameras (ONCs): Severe effects from touchdown events
Accurate measurements of the surface brightness and its spectrophotometric properties are essential for obtaining reliable observations of the physical and...
Pre-perihelion monitoring of interstellar comet 2I/Borisov
The discovery of interstellar comet 2I/Borisov offered the unique opportunity to obtain a detailed analysis of an object coming from another planetary system...
Precise characterisation of HD 15337 with CHEOPS: A laboratory for planet formation and evolution
Context. The HD 15337 (TIC 120896927, TOI-402) system was observed by the Transiting Exoplanet Survey Satellite (TESS), revealing the presence of two short...
Precise mass and radius of a transiting super-Earth planet orbiting the M dwarf TOI-1235: a planet in the radius gap?
We report the confirmation of a transiting planet around the bright weakly active M0.5 V star TOI-1235 (TYC 4384-1735-1, V ≈ 11.5 mag), whose transit signal was...
Precise mass determination for the keystone sub-Neptune planet transiting the mid-type M dwarf G 9-40
Context. Despite being a prominent subset of the exoplanet population discovered in the past three decades, the nature and provenance of sub-Neptune-sized...
Precise radial velocities of giant stars. XIII. A second Jupiter orbiting in 4:3 resonance in the 7 CMa system
We report the discovery of a second planet orbiting the K giant star 7 CMa based on 166 high-precision radial velocities obtained with Lick, HARPS, UCLES, and...