Seyfert galaxy NGC 4151
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Seyfert galaxy NGC 4151

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Published by Ruhr-Universitãt Bochum in Bochum .
Written in English


Book details:

Edition Notes

Habilitationsschrift vorgelegt der Fakultät für Physik und Astronomie der Ruhr- Universitãt Bochum.

StatementHartmut Schulz.
The Physical Object
Pagination1 v.
ID Numbers
Open LibraryOL15585183M

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NGC is only a weak radio source, and we consider ways of pro~ ducing a non-thermal optical continuum while suppressing radio-frequency synchrotron radiation Free- free absorption and possibly the Tsytovich effect appear able to attenuate radio frequencies below a few GHz. The Penrose photoproduction scenario for NGC A black hole gamma-ray emission mechanism for active galactic nuclei and Seyfert galaxies Authors: Leiter, D. The disk of the Seyfert galaxy NGC Simkin, S. M. Abstract. Spectroscopic observations of the "bar" in NGC show its continuous spectrum to have a large ultraviolet excess and no detectable stellar absorption features. The A [0 ii] line in emission leads to line-of-sight velocities for the ends of the bar of km 1 relative to Cited by: We present an analysis of UV and optical spectra of NGC obtained at high spectral and angular resolutions with the Hubble Space Telescope's (HST's) Space Telescope Imaging Spectrograph (STIS). We identify a kinematic component of the emission lines that has a width of km/s (FWHM), intermediate between those from the broad and narrow.

ten Seyfert galaxies in this sample with intrinsic absorption, all showed C IV and N V absorption, but only NGC showed Mg II absorption (although, recently, the presence of Mg II absorption has been confirmed in the Seyfert 1 galaxy NGC ; Kraemer et al. b). NGC is also unusual in the sense that it is the only active galaxy knownCited by: This paper is the third in a series in which we present deep Chandra ACIS-S imaging spectroscopy of the Seyfert 1 galaxy NGC , devoted to . From May to May , observations of the Seyfert galaxy NGC were made on 58 separate nights. In the nucleus was in its bright state, but . Photoelectric and photographic spectral observations of the Seyfert galaxy NGC were carried out in the region of the coronal line [Fe X] lambda Å on .

Optical polarization of the Seyfert galaxy NGC A great number of spectra of the Seyfert galaxy nucleus NGC were obtained in the Crimean Astrophysical Observatory in using the CCD. Significant variation in continuum intensity and. In order to improve the reverberation-mapping-based estimate of the mass of the central supermassive black hole in the Seyfert 1 galaxy NGC , we have reanalyzed archival ultraviolet monitoring spectra from two campaigns undertaken with the . We present deep vacuum ultraviolet (λλ Å) imagery of four Seyfert galaxies observed by the Ultraviolet Imaging Telescope (UIT): NGC , NGC , NGC , and Mrk