Where has all the accretion power gone in quiescent elliptical galaxies?

Details Where has all the accretion power gone in quiescent elliptical galaxies? Where has all the accretion power gone in quiescent elliptical galaxies?

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20371f&link_type=abstract

Spitzer Proposal ID #20371

Computer Science

Scientific paper

We propose to study why most supermassive black holes in the local universe appear to be X-ray faint or quiescent. Possible explanations are that: the accretion power is carried out by a jet; or, the nuclei are obscured by dust; or, accretion occurs at very low radiative efficiency (ADAF models); or, most of the infalling gas ends up forming stars instead of being accreted by the black hole. Spitzer observations will give us the key to complete our study of the broad-band spectral energy distribution for a sample of X-ray-faint SMBH nuclei in elliptical galaxies. We shall determine how much of the total energy is really radiated by their nuclei, and test those alternative scenarios quantitatively.

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