Upper limits to O III 5592 A and forbidden line NI IX 4594 A in Seyfert galaxies

Details Upper limits to O III 5592 A and forbidden line NI IX 4594 A in Seyfert galaxies Upper limits to O III 5592 A and forbidden line NI IX 4594 A in Seyfert galaxies

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273l..31o&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 273, Oct. 1, 1983, p. L31-L34.

Astronomy and Astrophysics

Astrophysics

7

Abundance, Charge Exchange, Emission Spectra, Nitrogen Ions, Oxygen Spectra, Seyfert Galaxies, Electron Energy, Forbidden Bands, Iron, Oxygen Ions, Spectral Line Width

Scientific paper

Observational upper limits are given to the strengths of the undetected emission lines O III 5592 A and forbidden line Ni IX 4594 A in several well observed Seyfert galaxies. The 5592 A upper limits show that the O III charge-exchange process does not contribute appreciably to the observed strength of 4363 A and thus does not appreciably modify the O III intensity ratio from which the temperature in the O (++) zone is derived. The 4594 A upper limits are consistent with normal Ni:Fe abundance ratios of about 0.1 in these objects, but would not be consistent with Ni:Fe of about 1.

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