IRS spectroscopy of "type-3" quasars

Details IRS spectroscopy of "type-3" quasars IRS spectroscopy of "type-3" quasars

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30447f&link_type=abstract

Spitzer Proposal ID #30447

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Scientific paper

We wish to obtain IRS spectra of a sample of objects which have the mid-infrared colors of AGN and mid-infared luminosities of quasars, but which lack AGN indicators in their optical spectra. Three of these objects have low-ionization optical spectra, and two lack emission lines but are most likely at z~1-2. We wish to investigate the possibility that these ``type-3'' quasars are an early phase in the development of AGN, perhaps hidden by a starburst triggered by the same merger event which triggered their AGN activity. Other possibilities include unusual starbursts with large amounts of warm dust, or otherwise normal AGN which lack a narrow line region. IRS spectra will allow us to distinguish between these different scenarios.

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