アブストラクト:
In order to look for the indication of “inside-out” scenario of galaxy formation in the local universe and also to test it, in this research the distribution of SFR and stellar mass of local massive galaxies (with log(M*)>10.5 located at 0.01<z<0.02) are resolved. The method so called “pixel-to-pixel SED fitting” is established to obtained the resolved SFR and stellar mass of galaxy by fitting the observed resolved 7 bands photometric SED (using data from GALEX and SDSS) with set of constructed Model SEDs. Fitting is done by using Bayesian Inference statistic. Currently resolved SFR and stellar mass of 137 spiral galaxies have been calculated and the result shows that almost all of the galaxies have effective radius of SFR higher than effective radius of stellar mass and majority of the galaxies have larger total SFR outside than total SFR inside of half-mass radius. Analysis on sSFR radial profiles shows that all the galaxies seem to have flat sSFR radial profile and even some show suppression in the center. This result may confirm some observational result (at z~1 and local universe) currently reported which were aclaimed to support the “inside-out” scenario of galaxy formation.