The Seyfert II Nature of the IRAS Source FSC10214+4724

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Session 4 -- AGNs
Display presentation, Monday, 9:20-6:30, Pauley Room

[4.02] The Seyfert II Nature of the IRAS Source FSC10214+4724

P.Eisenhardt (JPL/Caltech), R.Elston (CTIO), P.McCarthy (OCIW), M.Dickinson, H.Spinrad (UCB), B.Jannuzi (IAS), P.Maloney (JILA)

We (Elston et al. 1993) have observed the rest frame optical and UV spectra of the luminous, high redshift IRAS galaxy FSC10214+4724. We find the [NII]/H$\alpha$ and [OIII]/H$\beta$ emission line ratios to be typical of those found in Seyfert II galaxies. The large H$\alpha$/H$\beta$ ratio suggests substantial reddening of the narrow line region. The rest-frame optical emission is unpolarized (P=2.6$\pm$3.0\%). These properties are very similar to those of the infrared luminous galaxies found at lower redshift, suggesting that FSC10214+4724 is the luminous extreme of the same population. A deep 1.6$\mu$m image of the field shows FSC10214+4724 to be unresolved with two nearby companions and several other faint objects within $10^{''}$ of the point source. These could be a a foreground group of galaxies or galaxies physically associated with FSC10214+4724. This aggregate of objects may have contributed some of the far-infrared flux detected within the large beam of IRAS. If there is a foreground group gravitational lensing may contribute to the large luminosity of FSC10214+4724.

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