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Ryu, Dongsu
Astrophysics Lab
Research Interests
  • Shock waves and turbulence in clusters of galaxies
  • Origin and evolution of magnetic fields and cosmic rays in the universe
  • Plasma astrophysical phenomena in the large-scale structure of the universe

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IUE SPECTRA OF THE SEYFERT 1 GALAXIES Mrk 335 and NGC 4051

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Title
IUE SPECTRA OF THE SEYFERT 1 GALAXIES Mrk 335 and NGC 4051
Author
Hyung, SiekKim, HyoukLee, Woo BaikLee, Seong-JaeRyu, DongsuLee, Hee-Won
Keywords
galaxy nucleus: Seyfert 1; line profiles; IUE spectrum; individual (Mrk 335, NGC 4051)
Issue Date
2000-10
Publisher
KOREAN ASTRONOMICAL SOCIETY
Citation
JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY, v.33, no.2, pp.81 - 88
Abstract
The international ultraviolet explorer (IUE) spectra of a low dispersion $\~6{\AA}$ 수식 이미지, have been investigated for two Seyfert 1 galaxies, Mrk 335 and NGC 4051, well known for the line variability. The electron densities of broad line region (BLR) of these variable Seyfert 1 galaxies have been derived, which showed a non-linear abrupt variation from $10^8$ 수식 이미지 to $10^{10} cm-3$ 수식 이미지 within a month. We also found the excitation (or temperature) changes in the Mrk 335 BLR from the IUE broad line profiles analysis, but no such evidence in the NGC 4051. The large amount of mass inflow activity through the bar or spiral structure of host galaxies, may trigger the density change in BLR and emission line variability for both objects. Mass of the giant black holes appear to be order of $10^7\;M_{\bigodot}$ 수식 이미지 for both variable Seyfert l's.
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ISSN
1225-4614
Appears in Collections:
PHY_Journal Papers
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