The globular cluster system of NGC 1316: II. the extraordinary object SH2

Context. SH2 has been described as an isolated HII-region, located about 6.5′ south of the nucleus of NGC 1316 (Fornax A), a merger remnant in the the outskirts of the Fornax cluster of galaxies. Aims. We give a first, preliminary description of the stellar content and environment of this remarkable...

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Detalles Bibliográficos
Autores principales: Richtler, T., Kumar, B., Bassino, Lilia Patricia, Dirsch, B., Romanowsky, A. J.
Formato: Articulo Contribucion a revista
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Astronómicas
Galaxies: clusters: individual: NGC 1316
Galaxies: ISM
Galaxies: peculiar
Galaxies: star clusters: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84706
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84706
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: clusters: individual: NGC 1316
Galaxies: ISM
Galaxies: peculiar
Galaxies: star clusters: general
spellingShingle Ciencias Astronómicas
Galaxies: clusters: individual: NGC 1316
Galaxies: ISM
Galaxies: peculiar
Galaxies: star clusters: general
Richtler, T.
Kumar, B.
Bassino, Lilia Patricia
Dirsch, B.
Romanowsky, A. J.
The globular cluster system of NGC 1316: II. the extraordinary object SH2
topic_facet Ciencias Astronómicas
Galaxies: clusters: individual: NGC 1316
Galaxies: ISM
Galaxies: peculiar
Galaxies: star clusters: general
description Context. SH2 has been described as an isolated HII-region, located about 6.5′ south of the nucleus of NGC 1316 (Fornax A), a merger remnant in the the outskirts of the Fornax cluster of galaxies. Aims. We give a first, preliminary description of the stellar content and environment of this remarkable object. Methods. We used photometric data in the Washington system and HST photometry from the Hubble Legacy Archive for a morphological description and preliminary aperture photometry. Low-resolution spectroscopy provides radial velocities of the brightest star cluster in SH2 and a nearby intermediate-age cluster. Results. SH2 is not a normal HII-region, ionized by very young stars. It contains a multitude of star clusters with ages of approximately 10 8 yr. A ring-like morphology is striking. SH2 seems to be connected to an intermediate-age massive globular cluster with a similar radial velocity, which itself is the main object of a group of fainter clusters. Metallicity estimates from emission lines remain ambiguous. Conclusions. The present data do not yet allow firm conclusions about the nature or origin of SH2. It might be a dwarf galaxy that has experienced a burst of extremely clustered star formation. We may witness how globular clusters are donated to a parent galaxy.
format Articulo
Contribucion a revista
author Richtler, T.
Kumar, B.
Bassino, Lilia Patricia
Dirsch, B.
Romanowsky, A. J.
author_facet Richtler, T.
Kumar, B.
Bassino, Lilia Patricia
Dirsch, B.
Romanowsky, A. J.
author_sort Richtler, T.
title The globular cluster system of NGC 1316: II. the extraordinary object SH2
title_short The globular cluster system of NGC 1316: II. the extraordinary object SH2
title_full The globular cluster system of NGC 1316: II. the extraordinary object SH2
title_fullStr The globular cluster system of NGC 1316: II. the extraordinary object SH2
title_full_unstemmed The globular cluster system of NGC 1316: II. the extraordinary object SH2
title_sort globular cluster system of ngc 1316: ii. the extraordinary object sh2
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/84706
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