Early Type Galaxies in the Mid Infrared: a new flavor to their stellar populations

Details Early Type Galaxies in the Mid Infrared: a new flavor to their stellar populations Early Type Galaxies in the Mid Infrared: a new flavor to their stellar populations

2007-02-02

arxiv.org/abs/astro-ph/0702057v1

Astronomy and Astrophysics

Astrophysics

4 pages; proceedings of IAU Symposium No. 241, "Stellar Populations as Building Blocks of Galaxies", editors A. Vazdekis and R

Scientific paper

10.1017/S1743921307008575

The mid infrared emission of early type galaxies traces the presence of intermediate age stellar populations as well as even tiny amounts of ongoing star formation. Here we discuss high S/N Spitzer IRS spectra of a sample of Virgo early type galaxies, with particular reference to NGC 4435. We show that, by combining mid infrared spectroscopic observations with existing broad band fluxes, it is possible to obtain a very clean picture of the nuclear activity in this galaxy.

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