Strong Fe II forbidden line emission from NGC 1275

Details Strong Fe II forbidden line emission from NGC 1275 Strong Fe II forbidden line emission from NGC 1275

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...414..527r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 414, no. 2, p. 527-534.

Astronomy and Astrophysics

Astronomy

11

Active Galaxies, Emission Spectra, Forbidden Transitions, Infrared Sources (Astronomy), Interstellar Matter, Iron, Radio Galaxies, Red Shift, Seyfert Galaxies, Shock Waves

Scientific paper

The detection of a bright Fe II 12567-A forbidden line from the central regions of NGC 1275 is reported. The intensity of the Fe II 12567-A forbidden line relative to that of the other emission lines indicates the presence of a high abundance of iron in the gas phase, while the narrow width of the feature implies an origin outside the active nucleus. While a power-law continuum from the nucleus or from the cooling flows could excite the Fe II forbidden line emission, neither offers a likely mechanism for processing the circumnuclear dust grains in NGC 1275. This is not the case for shocks, which can also produce the low-ionization features characteristic of many of the off-nucleus emission line regions of NGC 1275.

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