Broad emission line profiles in Seyfert-1 galaxies. I - Evidence for a disk and a wind in MKN 335

Details Broad emission line profiles in Seyfert-1 galaxies. I - Evidence for a disk and a wind in MKN 335 Broad emission line profiles in Seyfert-1 galaxies. I - Evidence for a disk and a wind in MKN 335

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...186..103v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 186, no. 1-2, Nov. 1987, p. 103-113. Research supported by the Leids Kerkhoven

Astronomy and Astrophysics

Astrophysics

20

Active Galaxies, Disk Galaxies, Emission Spectra, Line Shape, Seyfert Galaxies, Spectral Line Width, Astronomical Models, Astronomical Spectroscopy, Balmer Series, Spectral Resolution, Wind Velocity

Scientific paper

High resolution spectroscopic observations of the Seyfert 1 galaxy Mkn 335 are presented. This galaxy is exceptional in the sense that its broad emission lines display a strong blue asymmetry. It is shown that the Hα/Hβ intensity ratio changes drastically with velocity shift. In the core of the broad lines the ratio is about 3.2, while it decreases to very low values (≡1.5) in the wings. The author also finds that the Hδ/Hβ ratio varies only by a small amount from line core to the wings, and is close to the theoretical case B recombination value. He proposes that these Balmer line ratios are produced by a medium with very high densities and a temperature of about 104K. The observations are interpreted in a model with two dynamically and spatially separate components: (1) A disk which contains the very high density material and emits ≡80% of the Balmer lines in a symmetric profile. (2) An outflowing component of much lower density (ne < 109cm-3) which emits the blue wing and most of Lyα and the higher excitation lines.

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