0000000000164999

AUTHOR

Valentina D'orazi

showing 2 related works from this author

The GAPS Programme with HARPS-N at TNG XV. A substellar companion around a K giant star identified with quasi-simultaneous HARPS-N and GIANO measurem…

2017

Context. Identification of planetary companions of giant stars is made difficult because of the astrophysical noise, that may produce radial velocity (RV) variations similar to those induced by a companion. On the other hand any stellar signal is wavelength dependent, while signals due to a companion are achromatic. Aims. Our goal is to determine the origin of the Doppler periodic variations observed in the thick disk K giant star TYC 4282-605-1 by HARPS-N at the Telescopio Nazionale Galileo (TNG) and verify if they can be due to the presence of a substellar companion. Methods. Several methods have been used to exclude the stellar origin of the observed signal including detailed analysis of…

Physicsstars: individual: TYC 4282-605-1010308 nuclear & particles physicsFOS: Physical sciencesAstronomy and AstrophysicsContext (language use)AstrophysicsPlanetary systemLight curveGiant star01 natural sciencesRadial velocityAmplitudeAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary SciencePlanettechniques: radial velocities0103 physical sciencesThick diskinfrared: stars; planetary systems; stars: individual: TYC 4282-605-1; techniques: radial velocities; Astronomy and Astrophysics; Space and Planetary Scienceinfrared: starsplanetary systems010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)
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HADES RV programme with HARPS-N at TNG: XII. The abundance signature of M dwarf stars with planets

2020

[Context] Most of our current knowledge on planet formation is still based on the analysis of main sequence, solar-type stars. Conversely, detailed chemical studies of large samples of M dwarfs hosting planets are still missing.

astro-ph.SRStellar massMetallicityFOS: Physical sciencesTechniques: spectroscopicStars: late-typeAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesspectroscopic [Techniques]Settore FIS/05 - Astronomia E AstrofisicaPrimary (astronomy)PlanetAbundance (ecology)0103 physical sciencesAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsEarth and Planetary Astrophysics (astro-ph.EP)Physics010308 nuclear & particles physicsStars: abundancesGiant planetAstronomy and Astrophysicsastro-ph.SR; astro-ph.SR; astro-ph.EPRadial velocityStarsPlanetary systemsAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary Scienceabundances [Stars]late-type [Stars]astro-ph.EPAstrophysics::Earth and Planetary AstrophysicsAstrophysics - Earth and Planetary Astrophysics
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