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Secular and environmental effects play a significant role in regulating thestar formation rate and hence the evolution of the galaxies. Since UV flux is adirect tracer of the star formation in galaxies, the UltraViolet ImagingTelescope (UVIT) onboard ASTROSAT enables us to characterize the star formingregions in a galaxy with its remarkable spatial resolution. In this study, wefocus on the secular evolution of NGC 628, a spiral galaxy in the localuniverse. We exploit the resolution of UVIT to resolve up to $\sim$ 63 pc inNGC 628 for identification and characterization of the star forming regions. Weidentify 300 star forming regions in the UVIT FUV image of NGC 628 usingProFound and the identified regions are characterized using Starburst99 models.The age and mass distribution of the star forming regions across the galaxysupports the inside-out growth of the disk. We find that there is nosignificant difference in the star formation properties between the two arms ofNGC 628. We also quantify the azimuthal offset of the star forming regions ofdifferent ages. Since we do not find an age gradient, we suggest that thespiral density waves might not be the possible formation scenario of the spiralarms of NGC 628. The headlight cloud present in the disk of the galaxy is foundto be having the highest star formation rate density ($0.23 M_{\odot} yr^{-1}kpc^{-2}$) compared to other star forming regions on spiral arms and the restof the galaxy.

Understanding the secular evolution of NGC 628 using UVIT