Computer Science
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30515s&link_type=abstract
Spitzer Proposal ID #30515
Computer Science
Scientific paper
We propose to obtain mid-IR spectra with Spitzer/IRS to search for highly obscured (a.k.a. "buried") AGN in an unusual type of powerful radio galaxy called "Compact Symmetric Objects" (CSOs). Evidence from VLBI radio imaging of CSOs strongly suggest that these sources are very young radio galaxies (500-3000 years old) which will eventually become large-scale powerful AGN. Thus, we are viewing the nuclear regions of these galaxies at the time of the "birth" of these AGN. While there is substantial multi-wavelength evidence for considerable nuclear gas in CSOs, near-IR images obtained by us using HST/NICMOS show no strong evidence for extremely large extinctions since the nuclear regions of these CSOs show normal elliptical galaxy profiles at H-band. But no AGN point source is seen. Either CSOs are "naked AGN" with no nuclear non-thermal continuum or reprocessed line emission or these AGN are so extincted as to be visible only in the mid-IR. We seek to test these two hypotheses and thus to determine whether gas accretion powers CSOs or whether CSOs (and all radio-loud AGN by extension) require a different type of energy source like Black Hole spin energy.
Darling Jeremy
Hearty Fred
Perlman Eric
Stocke John
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