Identification and properties of isolated field elliptical galaxies from CFHTLS-W1


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Ülgen E. K. , Aliş S., Benoist C., Yelkenci F. K. , Çakır O., Fişek S., ...More

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, vol.39, 2022 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39
  • Publication Date: 2022
  • Doi Number: 10.1017/pasa.2022.28
  • Journal Name: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
  • Journal Indexes: Science Citation Index Expanded
  • Keywords: galaxies elliptical and lenticular, cD, galaxies evolution, galaxies formation, galaxies fundamental parameters, surveys, BRIGHTEST CLUSTER GALAXIES, MASS ASSEMBLY GAMA, MORPHOLOGY-DENSITY RELATION, STELLAR POPULATION-MODELS, STAR-FORMATION, PHOTOMETRIC REDSHIFTS, RICH CLUSTERS, SIZE RELATION, EVOLUTION, CATALOG

Abstract

We present a catalogue of isolated field elliptical (IfE) galaxies drawn from the W1 field of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). 228 IfEs were identified from a flux-limited (r<21.8) galaxy catalogue which corresponds to a density of 3 IfE/sq.deg. For comparison we consider a sample of elliptical galaxies living in dense environments, based on identification of the brightest cluster galaxies (BGCs) in the same survey. Using the same dataset for the comparison sample ensures a uniform selection, including in the redshift range as IfEs (i.e. 0.1 < z < 0.9). A comparison of elliptical galaxies in different environments reveals that IfEs and BCGs have similar behaviours in their colours, star formation activities, and scaling relations of mass-size and size-luminosity. IfEs and BCGs have similar slopes in the scaling relations with respect to cluster ellipticals within the -24 <= M-r <= -22 magnitude and 10.2< log(M-*/ M-circle dot) <= 12.0 mass ranges. Three IfEs identified in this study can be associated with fossil groups found in the same survey area which gives clues for future studies.