Search results for "infrared: stars"

showing 2 items of 2 documents

MILES extended: Stellar population synthesis models from the optical to the infrared

2016

We present the first single-burst stellar population models which covers the optical and the infrared wavelength range between 3500 and 50000 Angstrom and which are exclusively based on empirical stellar spectra. To obtain these joint models, we combined the extended MILES models in the optical with our new infrared models that are based on the IRTF (Infrared Telescope Facility) library. The latter are available only for a limited range in terms of both age and metallicity. Our combined single-burst stellar population models were calculated for ages larger than 1 Gyr, for metallicities between [Fe/H] = -0.40 and 0.26, for initial mass functions of various types and slopes, and on the basis …

CAII TRIPLETStellar populationInfraredMetallicityINITIAL MASS FUNCTIONBROWN DWARFSInfrared telescopeFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesAstronomical spectroscopyinfrared: galaxiesATMOSPHERIC PARAMETERS0103 physical sciencesRange (statistics)Astrophysics::Solar and Stellar Astrophysics2.5 MU-MGIANT BRANCH STARS010303 astronomy & astrophysicsinfrared: starsEMPIRICAL CALIBRATIONAstrophysics::Galaxy AstrophysicsPhysics010308 nuclear & particles physicsNear-infrared spectroscopyHIGH-SPECTRAL-RESOLUTIONAstronomy and AstrophysicsEVOLUTIONARY SYNTHESISAstrophysics - Astrophysics of GalaxiesGalaxySpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)NEWTON-TELESCOPE LIBRARYgalaxies: stellar contentAstrophysics::Earth and Planetary Astrophysics
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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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