2010 (IPP)

Permanent URI for this collectionhttp://localhost:4000/handle/11007/152

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Author: search.filters.author.Vikram, VinuSubject: search.filters.subject.Formation — Galaxies

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    Quantitative measure of evolution of bright cluster galaxies at moderate redshifts
    (2010-01-01) Vikram, Vinu; et al.; Wadadekar, Yogesh; Kembhavi, A.K.
    Using archival data from the Hubble Space Telescope, we study the quantitative morphological evolution of spectroscopically confirmed bright galaxies in the core regions of nine clusters ranging in redshift from z = 0.31 to z = 0.84. We use morphological parameters derived from two dimensional bulge-disk decomposition to study the evolution. We find an increase in the mean bulge-to-total luminosity ratio B/T as the Universe evolves. We also find a corresponding increase in the fraction of early type galaxies and in the mean S´ersic index. We discuss these results and their implications to physical mechanisms for evolution of galaxy morphology.