Si X Forbidden Emission in NGC 1068 and NGC 7469

Details Si X Forbidden Emission in NGC 1068 and NGC 7469 Si X Forbidden Emission in NGC 1068 and NGC 7469

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...459l..61t&link_type=abstract

Astrophysical Journal Letters v.459, p.L61

Astronomy and Astrophysics

Astronomy

20

Galaxies: Active, Galaxies: Seyfert, Galaxies: Individual Ngc Number: Ngc 1068, Galaxies: Individual Ngc Number: Ngc 7469, Infrared: Galaxies

Scientific paper

This Letter presents the first observation of [Si X] emission in a celestial object other than the solar corona. The detected line at 1.430 mu m is present in the spectra of both NGC 1068 and NGC 7469. The ionization potential of Si X is 401.4 eV, which makes this one of the highest ionization energy lines observed in active galactic nuclei. The line falls in a region of high telluric absorption that requires a fortuitous combination of redshift and abnormally dry observing conditions to observe.

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