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Title:
Near-infrared emission-line spectra of the Orion Nebula, NGC 4151, and other Seyfert galaxies
Authors:
Osterbrock, Donald E.; Shaw, Richard A.; Veilleux, Sylvain
Affiliation:
AA(Lick Observatory; California, University, Santa Cruz), AB(Lick Observatory; California, University, Santa Cruz), AC(Lick Observatory; California, University, Santa Cruz)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 352, April 1, 1990, p. 561-573. Research supported by NSERC and Ministere de l'Education du Quebec. (ApJ Homepage)
Publication Date:
04/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CHARGE COUPLED DEVICES, EMISSION SPECTRA, INFRARED SPECTRA, NEAR INFRARED RADIATION, ORION NEBULA, SEYFERT GALAXIES, DATA REDUCTION, NIGHT SKY, TRANSITION PROBABILITIES
DOI:
10.1086/168558
Bibliographic Code:
1990ApJ...352..561O

Abstract

Near-IR CCD moderate-resolution spectra in the 7000-11,000 wavelength range were obtained for NGC 1976 and NGC 4151 in three overlapping segments. The strongest three lines in both objects are forbidden S III 9531, He I 10830, and forbidden S III 9069. Also, lower resolution spectra of 14 additional Seyfert galaxies were obtained. In all but two of these spectra, the strongest line is forbidden S III 9531. The line strengths among these galaxies are compared to trace ionization behavior.

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