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Evolutionary synthesis of galaxies at high spectral resolution with the code PEGASE-HR

hal.structure.identifierInstitut d'Astrophysique de Paris [IAP]
dc.contributor.authorLE BORGNE, Damien
hal.structure.identifierInstitut d'Astrophysique de Paris [IAP]
dc.contributor.authorROCCA-VOLMERANGE, Brigitte
hal.structure.identifierCentre de Recherche Astrophysique de Lyon [CRAL]
dc.contributor.authorPRUGNIEL, Philippe
hal.structure.identifierObservatoire astronomique de Strasbourg [OAS]
dc.contributor.authorLANÇON, Ariane
hal.structure.identifierInstitut d'Astrophysique de Paris [IAP]
dc.contributor.authorFIOC, Michel
hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorSOUBIRAN, C.
dc.date.created2004
dc.date.issued2004
dc.identifier.issn0004-6361
dc.description.abstractEnWe present PEGASE-HR, a new stellar population synthesis program generating high resolution spectra (R=10 000) over the optical range lambda=400--680 nm. It links the spectro-photometric model of galaxy evolution PEGASE.2 (Fioc & Rocca-Volmerange 1997) to an updated version of the ELODIE library of stellar spectra observed with the 193 cm telescope at the Observatoire de Haute-Provence (Prugniel & Soubiran 2001a). The ELODIE star set gives a fairly complete coverage of the Hertzprung-Russell (HR) diagram and makes it possible to synthesize populations in the range [Fe/H]=-2 to +0.4. This code is an exceptional tool for exploring signatures of metallicity, age, and kinematics. We focus on a detailed study of the sensitivity to age and metallicity of the high-resolution stellar absorption lines and of the classical metallic indices proposed until now to solve the age-metallicity degeneracy. Validity tests on several stellar lines are performed by comparing our predictions for Lick indices to the models of other groups. The comparison with the lower resolution library BaSeL (Lejeune et al. 1997) confirms the quality of the ELODIE library when used for simple stellar populations (SSPs) from 10 Myr to 20 Gyr. Predictions for the evolved populations of globular clusters and elliptical galaxies are given and compared to observational data. Two new high-resolution indices are proposed around the Hgamma line. They should prove useful in the analysis of spectra from the new generation of telescopes and spectrographs.
dc.language.isoen
dc.publisherEDP Sciences
dc.title.enEvolutionary synthesis of galaxies at high spectral resolution with the code PEGASE-HR
dc.typeArticle de revue
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
dc.identifier.arxivastro-ph/0408419
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.page881-897
bordeaux.volume425
bordeaux.peerReviewedoui
hal.identifierhal-00011159
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00011159v1
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