Nuclear activity in the barred spiral galaxy NGC 3660 from radio, optical, and X-ray observations

Astronomy and Astrophysics – Astrophysics

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Astronomical Spectroscopy, Barred Galaxies, Emission Spectra, Galactic Nuclei, Seyfert Galaxies, Spectrum Analysis, Galactic Evolution, Galactic Radiation, Radio Galaxies, Spectral Energy Distribution, Spectral Line Width, Ultraviolet Spectra, Visible Spectrum, X Ray Sources

Scientific paper

We report on radio, optical, UV, and X-ray observations of the barred spiral galaxy NGC 3660. This object is one of our program galaxies within a systematic study of activity in a complete sample of barred spirals. The application of various criteria involving observational results in different spectral ranges identifies NGC 3660 as a transition object between Seyfert 1 galaxies and narrow emission line galaxies (NELG's). NGC 3660 shows a rich emission line spectrum with ionization stages up to Fe XIV. This galaxy may therefore be regarded as a good example for a high ionization narrow emission line region galaxy.

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