Galaxies in the local Universe follow a bimodal distribution in the optical broad band colours with the blue region mostly populated by star forming spiral galaxies and the red region dominated by elliptical/S0 galaxies with little or no ongoing star formation. The number density of red galaxies are observed to increase from z ~ 1 which is now understood to be at the expense of blue galaxies. Several internal (AGN/stellar feedback, action of bar, bulges) and external process (ram pressure stripping, major mergers, harassment, starvation, strangulation) have been proposed as responsible for the suppression of star formation, a process known as "quenching". The main aim of the project is to study internal quenching mechanisms, especially the effect of structural components of spiral galaxies (like the bar and bulge) in quenching star formation. In this context, we have identified a sample of galaxies in the local universe (z < 0.1), which are ideal candidates to study internal quenching mechanisms. We performed a detailed multi-wavelength analysis (optical and UV photometric data) of a sub-sample of barred and unbarred spiral galaxies from the above sample to check for any correlation with the bar/bulge properties with internal quenching indicators. In this talk I will present the preliminary results from this study, which indicate a correlation between the length of the bar and internal quenching. I will also discuss our future plans to automate a similar analysis for the entire sample of these galaxies, spectroscopic study of a sub-sample and also to study specific sample galaxies in great detail.
BGS Office