Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348l...5o&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 348, Jan. 1, 1990, p. L5-L8.
Astronomy and Astrophysics
Astronomy
77
Emission Spectra, Hydrogen, Infrared Astronomy, Line Spectra, Seyfert Galaxies, Galactic Nuclei, Iron, Metallicity
Scientific paper
Measurements of several infrared lines in NGC 1068 are presented, including the forbidden Si VI transition at 1.962 microns which is detected for the first time in an extragalactic object. This line is among the brightest IR features (about 5 times stronger than H2 2.121 microns), is broad (Delta-v of about 1100 km/s), and has a profile similar to He I 1.083 microns. The possibility of using the forbidden Si VI line to trace Seyfert activity and the origin of the H, forbidden Fe II, and H2 lines are briefly discussed.
Moorwood Alan F. M.
Oliva Ernesto
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