Globular cluster systems as tracers of the evolutionary history in NGC 3258 and NGC 3268

Juan Pablo Caso, Lilia P. Bassino, Matías Gómez

Resultado de la investigación: Article

2 Citas (Scopus)

Resumen

We present a new photometric study of NGC 3258 and NGC 3268 globular cluster systems (GCSs), using images in filters B, C, V, R, I and z', obtained from four different telescopes. The wide spatial coverage allows us to estimate the whole extension of both GCSs more precisely than in previous works, and new values for the richness of GC subpopulations. We find differences in the azimuthal distribution between blue (metal-poor) and red (metal-rich) globular clusters (GCs), and confirm that radial profiles flatten towards the centre of the galaxies. In both cases we detected a radial gradient in the colour peak of blue GCs which might be related to the construction of the GCSs. We analyse the similarities and differences in both GCSs, in the context of the possible evolutionary histories of the host galaxies. We also obtain photometric metallicities for a large number of GC candidates around NGC 3258, by applying multicolour-metallicity relations. These results confirm the bimodal metallicity distribution.

Idioma originalEnglish
Páginas (desde-hasta)3227-3238
Número de páginas12
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen470
N.º3
DOI
EstadoPublished - 21 sep 2017

Huella dactilar

globular clusters
tracers
tracer
histories
metal
history
subpopulation
filter
metallicity
galaxies
distribution
metals
telescopes
color
filters
gradients
estimates
profiles

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

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title = "Globular cluster systems as tracers of the evolutionary history in NGC 3258 and NGC 3268",
abstract = "We present a new photometric study of NGC 3258 and NGC 3268 globular cluster systems (GCSs), using images in filters B, C, V, R, I and z', obtained from four different telescopes. The wide spatial coverage allows us to estimate the whole extension of both GCSs more precisely than in previous works, and new values for the richness of GC subpopulations. We find differences in the azimuthal distribution between blue (metal-poor) and red (metal-rich) globular clusters (GCs), and confirm that radial profiles flatten towards the centre of the galaxies. In both cases we detected a radial gradient in the colour peak of blue GCs which might be related to the construction of the GCSs. We analyse the similarities and differences in both GCSs, in the context of the possible evolutionary histories of the host galaxies. We also obtain photometric metallicities for a large number of GC candidates around NGC 3258, by applying multicolour-metallicity relations. These results confirm the bimodal metallicity distribution.",
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Globular cluster systems as tracers of the evolutionary history in NGC 3258 and NGC 3268. / Caso, Juan Pablo; Bassino, Lilia P.; Gómez, Matías.

En: Monthly Notices of the Royal Astronomical Society, Vol. 470, N.º 3, 21.09.2017, p. 3227-3238.

Resultado de la investigación: Article

TY - JOUR

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AU - Caso, Juan Pablo

AU - Bassino, Lilia P.

AU - Gómez, Matías

PY - 2017/9/21

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N2 - We present a new photometric study of NGC 3258 and NGC 3268 globular cluster systems (GCSs), using images in filters B, C, V, R, I and z', obtained from four different telescopes. The wide spatial coverage allows us to estimate the whole extension of both GCSs more precisely than in previous works, and new values for the richness of GC subpopulations. We find differences in the azimuthal distribution between blue (metal-poor) and red (metal-rich) globular clusters (GCs), and confirm that radial profiles flatten towards the centre of the galaxies. In both cases we detected a radial gradient in the colour peak of blue GCs which might be related to the construction of the GCSs. We analyse the similarities and differences in both GCSs, in the context of the possible evolutionary histories of the host galaxies. We also obtain photometric metallicities for a large number of GC candidates around NGC 3258, by applying multicolour-metallicity relations. These results confirm the bimodal metallicity distribution.

AB - We present a new photometric study of NGC 3258 and NGC 3268 globular cluster systems (GCSs), using images in filters B, C, V, R, I and z', obtained from four different telescopes. The wide spatial coverage allows us to estimate the whole extension of both GCSs more precisely than in previous works, and new values for the richness of GC subpopulations. We find differences in the azimuthal distribution between blue (metal-poor) and red (metal-rich) globular clusters (GCs), and confirm that radial profiles flatten towards the centre of the galaxies. In both cases we detected a radial gradient in the colour peak of blue GCs which might be related to the construction of the GCSs. We analyse the similarities and differences in both GCSs, in the context of the possible evolutionary histories of the host galaxies. We also obtain photometric metallicities for a large number of GC candidates around NGC 3258, by applying multicolour-metallicity relations. These results confirm the bimodal metallicity distribution.

KW - CD

KW - Galaxies: elliptical and lenticular

KW - Galaxies: evolution

KW - Galaxies: star clusters: individual: NGC 3258 & NGC 3268

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