Globular clusters: DNA of early-type galaxies?

This paper explores if the mean properties of early-type galaxies (ETGs) can be reconstructed from 'genetic' information stored in their globular clusters (GCs; i.e. in their chemical abundances, spatial distributions and ages). This approach implies that the formation of each globular occ...

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Detalles Bibliográficos
Autores principales: Forte, Juan Carlos, Vega, Ema Irene, Faifer, Favio Raúl, Smith Castelli, Analía Viviana, Escudero, Carlos Gabriel, González, Nélida Mabel, Sesto, Leandro Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Astronómicas
Galaxies: haloes
Galaxies: star clusters: general
Globular clusters: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85159
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85159
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
Galaxies: haloes
Galaxies: star clusters: general
Globular clusters: general
spellingShingle Ciencias Astronómicas
Galaxies: haloes
Galaxies: star clusters: general
Globular clusters: general
Forte, Juan Carlos
Vega, Ema Irene
Faifer, Favio Raúl
Smith Castelli, Analía Viviana
Escudero, Carlos Gabriel
González, Nélida Mabel
Sesto, Leandro Alberto
Globular clusters: DNA of early-type galaxies?
topic_facet Ciencias Astronómicas
Galaxies: haloes
Galaxies: star clusters: general
Globular clusters: general
description This paper explores if the mean properties of early-type galaxies (ETGs) can be reconstructed from 'genetic' information stored in their globular clusters (GCs; i.e. in their chemical abundances, spatial distributions and ages). This approach implies that the formation of each globular occurs in very massive stellar environments, as suggested by some models that aim at explaining the presence of multipopulations in these systems. The assumption that the relative number of GCs to diffuse stellar mass depends exponentially on chemical abundance, [Z/H], and the presence of two dominant GC subpopulations (<i>blue</i> and <i>red</i>), allows the mapping of low-metallicity haloes and of higher metallicity (and more heterogeneous) bulges. In particular, the masses of the low-metallicity haloes seem to scale up with dark matter mass through a constant. We also find a dependence of the GC formation efficiency with the mean projected stellar mass density of the galaxies within their effective radii. The analysis is based on a selected subsample of galaxies observed within the ACS Virgo Cluster Survey of the <i>Hubble Space Telescope</i>. These systems were grouped, according to their absolute magnitudes, in order to define composite <i>fiducial</i> galaxies and look for a quantitative connection with their (also composite) GCs systems. The results strengthen the idea that GCs are good quantitative tracers of both baryonic and dark matter in ETGs.
format Articulo
Articulo
author Forte, Juan Carlos
Vega, Ema Irene
Faifer, Favio Raúl
Smith Castelli, Analía Viviana
Escudero, Carlos Gabriel
González, Nélida Mabel
Sesto, Leandro Alberto
author_facet Forte, Juan Carlos
Vega, Ema Irene
Faifer, Favio Raúl
Smith Castelli, Analía Viviana
Escudero, Carlos Gabriel
González, Nélida Mabel
Sesto, Leandro Alberto
author_sort Forte, Juan Carlos
title Globular clusters: DNA of early-type galaxies?
title_short Globular clusters: DNA of early-type galaxies?
title_full Globular clusters: DNA of early-type galaxies?
title_fullStr Globular clusters: DNA of early-type galaxies?
title_full_unstemmed Globular clusters: DNA of early-type galaxies?
title_sort globular clusters: dna of early-type galaxies?
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/85159
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AT escuderocarlosgabriel globularclustersdnaofearlytypegalaxies
AT gonzaleznelidamabel globularclustersdnaofearlytypegalaxies
AT sestoleandroalberto globularclustersdnaofearlytypegalaxies
bdutipo_str Repositorios
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