Evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares

Iron abundances, surface gravities, effective temperatures and masses of 14 red giants and 16 stars of the giant branch clump in three old open clusters have been determined from DDO photometry. The masses derived for stars in the post-helium-flash stages of evolution, are systematically lower than...

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Detalles Bibliográficos
Autor principal: Claria, J.J.
Formato: Articulo Comunicacion
Lenguaje:Español
Publicado: 1980
Materias:
Astronomía
Galaxia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/146720
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-146720
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Astronomía
Galaxia
spellingShingle Astronomía
Galaxia
Claria, J.J.
Evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares
topic_facet Astronomía
Galaxia
description Iron abundances, surface gravities, effective temperatures and masses of 14 red giants and 16 stars of the giant branch clump in three old open clusters have been determined from DDO photometry. The masses derived for stars in the post-helium-flash stages of evolution, are systematically lower than those found for the pre-helium-flash red giants, the average difference in log(m/mₚ) being -0.44. A second result is that the masses of the clump stars are smaller than the corresponding turnoff point masses. A similar trend between the giants and horizontal branch stars in five globular clusters as well as in the evolved stars of M67 and NGC 7789 has been found from existing DDO photometry. These results are interpreted as demonstrating that the post-helium-flash stars undergo mass loss before reaching their helium core burning phase of evolution. We identify the highest luminosity phase of red giant as that during which mass is lost most rapidly.
format Articulo
Comunicacion
author Claria, J.J.
author_facet Claria, J.J.
author_sort Claria, J.J.
title Evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares
title_short Evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares
title_full Evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares
title_fullStr Evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares
title_full_unstemmed Evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares
title_sort evidencia observacional acerca de la pérdida de masa en gigantes rojas de agregados estelares
publishDate 1980
url http://sedici.unlp.edu.ar/handle/10915/146720
work_keys_str_mv AT clariajj evidenciaobservacionalacercadelaperdidademasaengigantesrojasdeagregadosestelares
bdutipo_str Repositorios
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