Artículo
Brightest group galaxies and the large-scale environment
Luparello, Heliana Estefanía
; Lares Harbin Latorre, Marcelo
; Paz, Dante Javier
; Yaryura, Claudia Yamila
; Garcia Lambas, Diego Rodolfo
; Padilla, Nelson
Fecha de publicación:
01/2015
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We study the dependence of the properties of group galaxies on the surrounding large-scale environment, using Sloan Digital Sky Survey-seventh data release data. Galaxies are ranked according to their luminosity within each group and classified morphologically by the Sérsic index. We have considered samples of the host groups in superstructures of galaxies, and elsewhere. We find a significant dependence of the properties of late-type brightest group galaxies on the large-scale environment: they show statistically significant higher luminosities and stellar masses, redder u-r colours, lower star formation activity and longer star formation time-scale when embedded in superstructures. By contrast, the properties of the early-type brightest group galaxies are remarkably similar regardless of the group global environment. The other group member galaxies exhibit only the local influence of the group they inhabit. Our analysis comprises tests against the dependence on the host group luminosity and we argue that group brightest member properties are not only determined by the host halo, but also by the large-scale structure which can influence the accretion process on to their late-type brightest galaxies.
Palabras clave:
Large-Scale Structure of Universe
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Articulos(IATE)
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Articulos de INST.DE ASTRONOMIA TEORICA Y EXPERIMENTAL
Citación
Luparello, Heliana Estefanía; Lares Harbin Latorre, Marcelo; Paz, Dante Javier; Yaryura, Claudia Yamila; Garcia Lambas, Diego Rodolfo; et al.; Brightest group galaxies and the large-scale environment; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 448; 2; 1-2015; 1483-1493
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