Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...184...93b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 184, no. 1-2, Oct. 1987, p. 93-103.
Astronomy and Astrophysics
Astrophysics
22
Interstellar Matter, Ionization, Markarian Galaxies, Quasars, Seyfert Galaxies, Stellar Coronas, Galactic Nuclei, Spatial Distribution
Scientific paper
The authors present long slit spectroscopic data of three Markarian galaxies and one QSO in the Hβ-[O III] λλ4959 - 5007 wavelength range. They have detected ionized nebulosities around the four objects. They present kinematic data, together with the variations of the [O III] λ5007 line intensity and [O III] λ5007/Hβ intensity ratio throughout the ionized region. The absolute density and filling factor of the ionized gas have been estimated for the four objects studied here and four additional nebulosities previously known. The filling factors are always small. However they tend to be larger in galaxies with weaker UV sources and at smaller distances from the nucleus. A more homogeneous distribution of the gas might also be linked to large turbulent motions.
Bergeron Jacqueline
Durret Florence
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