The regions of high excitation gas detected around various Active Galactic Nuclei (AGN) are examined. The radiation emitted by the nucleus may be responsible...
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PublicationExtended line emission in AGN: Looking at the central engine
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PublicationFamilies of galaxies in the mu(e)-R(e) plane
It is shown on the basis of a complete sample of Virgo cluster galaxies and a larger set of varied data from the literature that ellipticals, early-type dwarfs...
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PublicationForces on magnetic flux tubes moving in inhomogeneous flows
The back-reaction of an incompressible two-dimensional flow of constant strain to the accelerated motion of a straight cylinder is calculated in the general...
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PublicationGalactic evolution of the light-element isotopes
The galactic evolution of the abundances of the light-element isotopes (6Li, 7Li, 9Be, 10B, and 11B) is re-examined in view of recent measurements of the 7Li...
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PublicationGas kinematics in the nucleus of NGC 6946
A complex kinematical structure is inferred from the analysis of high resolution spectra of the nuclear region of the galaxy NGC 6946. The spatial resolution of...
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PublicationHigh-resolution rotation curves of NGC 7626: Dynamics of a young kinematically peculiar core
The velocity field of the central parts of the elliptical galaxy NGC 7626 has been mapped by obtaining high resolution curves and velocity dispersion profiles...
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PublicationImprovement of the Hubble diagram for QSO's leading towards g(O)
Using the predictions of the Lynden Bell/Hills model of the energy source of QSO's in which discrete packets of matter (e.g., stars) are converted into...
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PublicationInfrared Spectroscopy Of V404 CYGNI. Limits On The Accretion Disc Contamination
We have obtained for the first time 2.10 - 2.45 micron infrared spectra of soft X-ray transient V404 Cygni. We determine a 95 percent confidence upper limit to...
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PublicationInfrared studies of Seyfert galaxies and of the irregular galaxy M 82
Middle and far infrared studies of the irregular galaxy M 82 and of Seyfert galaxies are presented. M 82 was observed spectrophotometrically from 8 to 13...