Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...529..219s&link_type=abstract
The Astrophysical Journal, Volume 529, Issue 1, pp. 219-223.
Astronomy and Astrophysics
Astronomy
13
Galaxies: Active, Galaxies: Individual (Ngc 1052), Galaxies: Nuclei, Infrared: Galaxies, Line: Formation
Scientific paper
We have observed the prototypical LINER NGC 1052 with the Infrared Space Observatory Short-Wavelength Spectrometer. While we have detected the [Ne II] 12.8 μm line, we have obtained a strict upper limit for the [Ne III] 15.6 μm line. A large [Ne II]/[Ne III] line ratio and small [Ne III]/[O III] λ5007 and [Ne II]/[OIII] line ratios are consistent with slow-shock models with ~130 km s-1 shock velocity. Our results support the original suggestions of shock excitation as a dominant source for NGC 1052. We have fitted the infrared and optical line ratios with a combination of shock and photoionization models. The best combination among the simple models we considered suggests that the contribution of shock and photoionization to [O III] λ5007 emission is four-fifths and one-fifth, respectively.
Malkan Matthew A.
Sugai Hideo
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