your ID: 0305 First Name: Qiusheng Last Name: Gu Affiliation: Department of Astronomy, Nanjing University Title: Spitzer Reveals SMBHs\' activity in Elliptical Galaxies Authors: Q. Gu, J.-S. Huang, G. Wilson, G.G. Fazio Topic: 1 Session: oral Abstract: By using Spitzer IRAC and MIPS images, we investigate infrared properties of a sample of nearby elliptical galaxies. We detect an infrared-red nucleus in one third of elliptical galaxies, which is attributed to the dust rerediation heated by the central AGNs.