Revised Stromgren metallicity calibration for red giants

Simple item page
dc.contributor.authorHilker, M
dc.date.accessioned2025-01-21T01:31:31Z
dc.date.available2025-01-21T01:31:31Z
dc.date.issued2000
dc.description.abstractA new calibration of the Stromgren (b - y), mi diagram in terms of iron abundance of red giants is presented. This calibration is based on a homogeneous sample of giants in the globular clusters omega Centauri, M 22, and M 55 as well as field giants from the list of Anthony-Twarog & Twarog (1998). Towards high metallicities, the new calibration is connected to a previous calibration by Grebel & Richtler (1992), which was unsatisfactory for iron abudances lower than -1.0 dex. The revised calibration is valid for CN-weak/normal red giants in the abundance range of -2.0 <[Fe/H]< 0.0 dex, and a color range of 0.5 < (b - y) < 1.1 mag.
dc.description.abstractAs shown for red giants in omega Centauri, CN-weak stars with Stromgren metallicities higher than -1.0 dex cannot be distinguished in the (b - y), m(1) diagram from stars with lower iron abundances but higher CN band strengths.
dc.fuente.origenWOS
dc.identifier.issn0004-6361
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97083
dc.identifier.wosidWOS:000086869100019
dc.issue.numero3
dc.language.isoen
dc.pagina.final1002
dc.pagina.inicio994
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectstars : abundances
dc.subjectstars : chemically peculiar
dc.subjectstars : late-type
dc.subjectGalaxy : globular clusters : individual : omega Cen
dc.subjectGalaxy : globular clusters : individual : M 22
dc.titleRevised Stromgren metallicity calibration for red giants
dc.typeartículo
dc.volumen355
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas