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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
Stäng
- 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
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (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
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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