Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265...92m&link_type=abstract
Astrophysical Journal, Part 1, vol. 265, Feb. 1, 1983, p. 92-106.
Astronomy and Astrophysics
Astrophysics
69
Continuous Spectra, Galactic Radiation, Interstellar Extinction, Iue, Seyfert Galaxies, Spectrophotometry, Balmer Series, Emission Spectra, Forbidden Bands, Galactic Nuclei, H Lines, Infrared Spectra, Interstellar Matter, Stellar Radiation, Ultraviolet Spectra
Scientific paper
The authors have used IUE visual and infrared observations to study the spectra of the Seyfert 2 galaxies NGC 1068 and Markarian 3, and the Seyfert 1.5 galaxy Markarian 6. The starlight in these galaxies is reddened by 0.01, 0.18, and 0.06 mag in EB-V, respectively; the forbidden lines are reddened by 0.29, 0.27, and 0.27 mag, respectively. A nonstellar component contributes 15, 20, and 30% of the visual flux, respectively, in NGC 1068, Mrk 3, and Mrk 6, in a 14arcsec aperture. It has a significant flux in the near-infrared and in the far-ultraviolet, and is well described by a power law with a slope of ≡ -1.1 in all three galaxies. The Seyfert 2's have warm dust which emits a large thermal infrared flux. If the central continuum heats this dust, it must be reddened by 0.3 and 0.5 mag or more in NGC 1068 and Mrk 3.
Malkan Matthew A.
Oke Bev J.
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