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

van Groningen, E. (författare)
1987
1987
Engelska.
Ingår i: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 186:1-2, s. 103-113113
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • 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 Halpha/Hbeta intensity ratio changes drastically with velocity shift. It is also found that the Hdelta/Hbeta ratio varies only by a small amount from line core to the wings, and is close to the theoretical case B recombination value. It is proposed that these Balmer line ratios are produced by a medium with very high densities and a temperature of about 10 4 K. These observations are interpreted by a model with two dynamically and spatially separate components: a disk which contains the very high density material and emits ~80% of the Balmer lines in a symmetric profile and an outflowing component of much lower density which emits the blue wing and most of Ly alpha and the higher excitation lines (such as C IV lambda1549)

Ämnesord

NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Experimental/ accretion disks
astronomical spectra
galactic nuclei
Markarian galaxies
Seyfert galaxies
spectral line breadth
visible astronomical observations/ broad emission line profiles
active galactic nucleus
visible
nuclear accretion disk
galactic wind
high-density disk
case-B recombination emission
low-density wind
radial velocity
disk temperature
near-UV
Mkn 335
Seyfert-1 galaxy
strong blue asymmetry
Halpha/Hbeta intensity ratio
velocity shift
Hdelta/Hbeta ratio
Balmer line ratios
spatially separate components
very high density material
Balmer lines
symmetric profile
outflowing component
blue wing
Ly alpha
higher excitation lines
C IV lambda1549
10 kK
351.0 to 734.0 nm/ A9580J Photographic region astronomical observations A9850E Galactic structure
content and morphology A9850R Active and peculiar galaxies/ temperature 1.0E+04 K
wavelength 3.51E-07 to 7.34E-07 m

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