Wide-field study of the peculiar globular cluster system hosted by the field lenticular NGC 1172

We present a wide-field study of the globular cluster system (GCS) of the field lenticular galaxy NGC 1172, based on observations from GMOS/Gemini (optical), FourStar/Magellan (NIR), and archival data from ACS/HST (optical). This analysis covers the full extension of the GCS, and results in a value...

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Autores principales: Ennis, Ana Inés, Caso, Juan Pablo, Bassino, Lilia Patricia, Salinas, Ricardo, Gómez, Matías
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Astronómicas
Galaxies: elliptical and lenticular, cD
Galaxies: star clusters: individual: NGC 1172
Galaxies: evolution
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125606
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125606
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: elliptical and lenticular, cD
Galaxies: star clusters: individual: NGC 1172
Galaxies: evolution
spellingShingle Ciencias Astronómicas
Galaxies: elliptical and lenticular, cD
Galaxies: star clusters: individual: NGC 1172
Galaxies: evolution
Ennis, Ana Inés
Caso, Juan Pablo
Bassino, Lilia Patricia
Salinas, Ricardo
Gómez, Matías
Wide-field study of the peculiar globular cluster system hosted by the field lenticular NGC 1172
topic_facet Ciencias Astronómicas
Galaxies: elliptical and lenticular, cD
Galaxies: star clusters: individual: NGC 1172
Galaxies: evolution
description We present a wide-field study of the globular cluster system (GCS) of the field lenticular galaxy NGC 1172, based on observations from GMOS/Gemini (optical), FourStar/Magellan (NIR), and archival data from ACS/HST (optical). This analysis covers the full extension of the GCS, and results in a value of specific frequency (S_N=8.6 ± 1.5) peculiarly high for an intermediate-mass galaxy in a low-density environment such as this one. We find that the GCS appears to be bimodal, although the colour distribution is narrow and does not allow for an accurate separation of the subpopulations. However, the combination of optical and NIR filters allows us to obtain an estimation of the metallicity distribution based on the photometry, which supports bimodality. We conclude that the presence of a large fraction of metal-poor globular clusters (GCs) and the high specific frequency point to NGC 1172 having accreted a significant amount of GCs from low-mass satellites in the past.
format Articulo
Articulo
author Ennis, Ana Inés
Caso, Juan Pablo
Bassino, Lilia Patricia
Salinas, Ricardo
Gómez, Matías
author_facet Ennis, Ana Inés
Caso, Juan Pablo
Bassino, Lilia Patricia
Salinas, Ricardo
Gómez, Matías
author_sort Ennis, Ana Inés
title Wide-field study of the peculiar globular cluster system hosted by the field lenticular NGC 1172
title_short Wide-field study of the peculiar globular cluster system hosted by the field lenticular NGC 1172
title_full Wide-field study of the peculiar globular cluster system hosted by the field lenticular NGC 1172
title_fullStr Wide-field study of the peculiar globular cluster system hosted by the field lenticular NGC 1172
title_full_unstemmed Wide-field study of the peculiar globular cluster system hosted by the field lenticular NGC 1172
title_sort wide-field study of the peculiar globular cluster system hosted by the field lenticular ngc 1172
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/125606
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