Red population of Abell 1314 : A Rest-Frame Narrowband Photometric
  Evolutionary Analysis
  Red sequence galaxies form with an intense burst of star formation in the
early universe to evolve passively into massive, metal rich, old galaxies at z
~ 0. But Abell 1314 (z=0.034) is found to host almost all red sequence galaxy
members -- identified using the mz index, classified using the Principle
Component Analysis technique and SDSS colour correlations -- some of which show
properties of low-mass, star forming, and metal rich galaxies. The variably
spread Intra-Cluster Medium (ICM) near the core forms a vital part in
influencing the evolution of these members. To study their evolution, I
correlated different parameters of the rest-frame narrowband photometry and the
derived luminosity-weighted mean Single Stellar Population model ages and
metallicities.
  The study finds the member galaxies evolve differently in three different
sections of the cluster: 1. the region of < 200 kpc hosts passively evolving
old, massive systems which accumulate mass by dry, minor mergers, 2. the zone
between 200-500 kpc shows stripped systems (or in the process of being gas
stripped) by ram pressure with moderate star formation history, 3. the outer
regions (> 500 kpc) show low-mass red objects with blue, star forming
Butcher-Oemler galaxy like colours. This sort of environmental condition is
known to harbour hybrid systems, like, the pseudo bulges, blue sequence E/S0
and Butcher-Oemler like satellite cluster galaxies. Overall, the cluster is
found to be poor, quiescent with galaxies to have formed by the monolithic
structure formation in the early universe and are now evolving with mergers and
gas stripping processes by ram pressure.
