Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...443l..65s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 443, no. 2, p. L65-L68
Astronomy and Astrophysics
Astronomy
23
Active Galactic Nuclei, Emission Spectra, Infrared Sources (Astronomy), Infrared Spectroscopy, Line Spectra, Lyman Alpha Radiation, Optical Emission Spectroscopy, Seyfert Galaxies, Ultraviolet Spectra, Visible Spectrum, Imaging Spectrometers, Interstellar Extinction, Molecular Gases, Red Shift, Spectral Resolution, Spectrum Analysis, Stellar Luminosity, Telescopes
Scientific paper
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 O IV) + Si IV, N III, N IV), Si II, Ne IV, and possibly N II and (Ne III), as well as clearly showing that Ly-alpha 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 Active galactic nuclei (AGN) powering much or most of the observed luminosity. The various spectral lines lead to a wide range in the inferred reddening and ionization parameter for this system, suggesting that we are viewing several environments through differing extinctions.
Armus Lee
Cohen Judith Gamora
Matthews Keith
Neugebauer Gernot
Oke Bev J.
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