We present a new database of our two-dimensional bulge-disk decompositions for 14,233 galaxies drawn from SDSS DR12 in order to examine the properties of bulges residing in the local universe ( 0.005 < z < 0.05 ) .
We performed decompositions in g and r bands by utilizing the galfit software .
The bulge colors and bulge-to-total ratios are found to be sensitive to the details in the decomposition technique , and hence we hereby provide full details of our method .
The g - r colors of bulges derived are almost constantly red regardless of bulge size except for the bulges in the low bulge-to-total ratio galaxies ( B / T _ { r } \lesssim 0.3 ) .
Bulges exhibit similar scaling relations to those followed by elliptical galaxies , but the bulges in galaxies with lower bulge-to-total ratios clearly show a gradually larger departure in slope from the elliptical galaxy sequence .
The scatters around the scaling relations are also larger for the bulges in galaxies with lower bulge-to-total ratios .
Both the departure in slopes and larger scatters are likely originated from the presence of young stars .
The bulges in galaxies with low bulge-to-total ratios show signs of a frosting of young stars so substantial that their luminosity-weighted Balmer-line ages are as small as 1 Gyr in some cases .
While bulges seem largely similar in optical properties to elliptical galaxies , they do show clear and systematic departures as a function of bulge-to-total ratio .
The stellar properties and perhaps associated formation processes of bulges seem much more diverse than those of elliptical galaxies .