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Published online by Cambridge University Press: 07 August 2017
For a true picture of the stellar content of the bulges of spiral galaxies it is necessary to combine spectroscopic and photometric observations from the ultraviolet to the infrared. In early-type spirals one generally finds a metal-rich, old population with no excess of low mass stars. In later type systems there is an increasing contribution from young stars. The population in the Galactic bulge is representative and does not contain a significant number of stars with large IR excesses.