Morphology with light profile fitting of confirmed cluster galaxies at z = 0.84

J. B. Nantais, H. Flores, R. Demarco, C. Lidman, P. Rosati, M. J. Jee

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We perform a morphological study of 124 spectroscopically confirmed cluster galaxies in the redshift (z) = 0.84 galaxy cluster RX J0152.7-1357. Our classification scheme includes color information, visual morphology, and one-and two-component light profile fitting derived from Hubble Space Telescope riz imaging. We adopt a modified version of a detailed classification scheme previously used in studies of field galaxies and found to be correlated with kinematic features of those galaxies. We compare our cluster galaxy morphologies to those of field galaxies at similar redshift. We also compare galaxy morphologies in regions of the cluster with different dark-matter density as determined by weak-lensing maps. We find an early-type fraction for the cluster population as a whole of 47%, about 2.8 times higher than the field, and similar to the dynamically young cluster MS 1054 at similar redshift. We find the most drastic change in morphology distribution between the low and intermediate dark-matter density regions within the cluster, with the early-type fraction doubling and the peculiar fraction dropping by nearly half. The peculiar fraction drops more drastically than the spiral fraction going from the outskirts to the intermediate-density regions. This suggests that many galaxies falling into clusters at z ∼ 0.8 may evolve directly from peculiar, merging, and compact systems into early-type galaxies, without having the chance to first evolve into a regular spiral galaxy.

Original languageEnglish
Article numberA5
JournalAstronomy and Astrophysics
Volume555
DOIs
Publication statusPublished - 2013 Jan 1

Fingerprint

galaxies
profiles
kinematics
dark matter
spiral galaxies
falling
Hubble Space Telescope
color
distribution
young

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Nantais, J. B. ; Flores, H. ; Demarco, R. ; Lidman, C. ; Rosati, P. ; Jee, M. J. / Morphology with light profile fitting of confirmed cluster galaxies at z = 0.84. In: Astronomy and Astrophysics. 2013 ; Vol. 555.
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Morphology with light profile fitting of confirmed cluster galaxies at z = 0.84. / Nantais, J. B.; Flores, H.; Demarco, R.; Lidman, C.; Rosati, P.; Jee, M. J.

In: Astronomy and Astrophysics, Vol. 555, A5, 01.01.2013.

Research output: Contribution to journalArticle

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