The history of the Galactic bulge

Planetary nebulae form in stellar populations with ages from 1 to 10 Gyr, and can be used to trace their star formation histories. Here we apply this to the Galactic bulge, where there are indications both for an old origin and for younger stars. We use new stellar models, which have significant dif...

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Detalles Bibliográficos
Autores principales: Zijlstra, A. A., Gesicki, K., Miller Bertolami, Marcelo Miguel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Astronómicas
Galaxy: bulge
Galaxy: evolution
planetary nebulae: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85907
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85907
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Galaxy: bulge
Galaxy: evolution
planetary nebulae: general
spellingShingle Ciencias Astronómicas
Galaxy: bulge
Galaxy: evolution
planetary nebulae: general
Zijlstra, A. A.
Gesicki, K.
Miller Bertolami, Marcelo Miguel
The history of the Galactic bulge
topic_facet Ciencias Astronómicas
Galaxy: bulge
Galaxy: evolution
planetary nebulae: general
description Planetary nebulae form in stellar populations with ages from 1 to 10 Gyr, and can be used to trace their star formation histories. Here we apply this to the Galactic bulge, where there are indications both for an old origin and for younger stars. We use new stellar models, which have significant different evolutionary speeds during the post-AGB phase. We apply these new models to a sample of 32 planetary nebulae with HST imaging and VLT spectroscopy. The results show evidence for an old starburst, followed by continuous star formation until at least 2Gyr ago. This agrees very well with recent analysis of colour-magnitude diagrams of the bulge. We show that the new models can also explain the [OIII] luminosity functions, and predict the uniform luminosity cut-off both in spiral galaxies and old elliptical galaxies.
format Articulo
Articulo
author Zijlstra, A. A.
Gesicki, K.
Miller Bertolami, Marcelo Miguel
author_facet Zijlstra, A. A.
Gesicki, K.
Miller Bertolami, Marcelo Miguel
author_sort Zijlstra, A. A.
title The history of the Galactic bulge
title_short The history of the Galactic bulge
title_full The history of the Galactic bulge
title_fullStr The history of the Galactic bulge
title_full_unstemmed The history of the Galactic bulge
title_sort history of the galactic bulge
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/85907
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bdutipo_str Repositorios
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