(a) SED of two EROs in the COSMOS field. The filled circles show the observed photometric data, and the solid curves show the best-fitting templates. Photometric redshift, number of the spectral type, age, and dust extinction in the V band for each EROs are also shown. (b) Distribution of spectral type (SpT) for EROs in the COSMOS field. : pure disk (late type); : pure bulge (early type). . (c) Distribution of dust extinction in the V band ( A _V ) for EROs in our sample.