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Published April 20, 1995 | Published
Journal Article Open

Near-infrared and optical spectroscopy of FSC 10214+4724


New infrared and optical spectroscopic observations, obtained with the W. M. Keck Telescope, are reported for the highly luminous infrared source FSC 10214+4724. The rest frame optical spectrum shows new emission lines of [Ne III], [Ne v], [O I], [O II], [S II], and He^+, while the rest frame ultraviolet spectrum shows new lines of 0 Iv] + Si IV, N III, N IV], Si II, Ne IV, and possibly N II and [Ne m], as well as clearly showing that Lyɑ is self-absorbed. The emission-line spectrum is most characteristic of a Seyfert 2 nucleus. The preponderance of spectroscopic evidence strengthens the case for a dust-enshrouded AGN powering much or most of the observed luminosity. The various spectral lines lead to a wide range in the inferred reddening and ionization on parameter for this system, suggesting that we are viewing several environments through differing extinctions.

Additional Information

© 1995 American Astronomical Society. Received 1994 October 11; accepted 1995 February 3. We would like to thank W. Harrison for assistance with the observations; G. Ferland, Ari Laor, and Brain Espey for help in implementing and running the CLOUDY program; and Matt Malkan for useful discussions. It is a pleasure to thank the W. M. Keck Foundation and its President, Howard B. Keck, for the generous grant that made the W. M. Keck Observatory possible. Infrared astronomy at Caltech is supported by grants from the NSF and NASA. This research has made use of the NASA/IPAC Extragalactic Database which is operated by the Jet Propulsion Laboratory, Caltech, under contract with NASA.

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Published - 1995ApJ___443L__65S.pdf


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