Morphology, colour–magnitude, and scaling relations of galaxies in Abell 426

ABSTRACT We present photometric properties of 183 member galaxies in the Abell 426 cluster using Sloan Digital Sky Survey (SDSS) imaging and spectroscopic observation. Detailed morphology based on visual classification followed by multicomponent image decomposition 179 is presented SDSS g, r, i bands. More than 80 per cent members are early-type (ETGs), with elliptical, dwarf elliptical (dE), lenticular follow red-sequence colour–magnitude diagram (CMD). With a few dEs spirals blue cloud, CMD nearly unimodal. The ∼2-mag fainter different Sersic index central velocity dispersion distribution their bright counterparts. Further, we establish Kormendy relation (KR) fundamental plane (FPR) for five samples ETGs constructed derived physical parameters such as index, concentration, mean r-band slope zero-point KR 3.02 ± 0.1 18.65 0.03 close agreement to other ellipticals local higher redshift. Kinematics-based ETG sample produces least scatter getting brighter ∼1.3 mag from g band. low-mass similar but form parallel KR. an FPR = 1.37 0.003, b 0.35 0.05, c −9.37 0.02 r band; tend deviate this at end. A catalogue 2D structural analysis available online.