Abstract
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 μm 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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | L61-L63 |
| Journal | Astrophysical Journal |
| Volume | 459 |
| Issue number | 2 PART II |
| State | Published - 1996 |
Keywords
- Galaxies: Active
- Galaxies: Individual (NGC 1068, NGC 7469)
- Galaxies: Seyfert
- Infrared: Galaxies
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science