Context. We present 12.8 μm images of the core of NGC 1068, the archetype Seyfert type II galaxy, obtained during first operations of the BURST mode of the VLT/VISIR (Imager and Spectrometer in the InfraRed at the Very Large Telescope). Aims. We trace structures under the diffraction limit of one UT (Unit Telescope at the VLT) and we investigate the link between dust in the vicinity of the cent...

We compare observations of AGB stars and predictions of the Elitzur & Ivezić (2001) steadystate radiatively driven dusty wind model. The model results are described by a set of similarity functions of a single independent variable, and imply general scaling relations among the system parameters. We find that the model properly reproduces various correlations among the observed quantities and de...

In this paper, we show how the two-fluid equations describing the evolution of a dust and gas mixture can be re-formulated to describe a single fluid moving with the barycentric velocity of the mixture. This leads to evolution equations for the total density, momentum, the differential velocity between the dust and the gas phases and either the dust-to-gas ratio or the dust fraction. The equati...

Primary features of a new cosmological model, which is based on conjectures about an existence of the graviton background and superstrong gravitational quantum interaction, are considered. An expansion of the universe is impossible in such the model because of deceleration of massive objects by the graviton background, which is similar to the one for the NASA deep space probes Pioneer 10, 11. R...

A s cardiologists know to their cost, the course of coronary artery disease is highly unpredictable. Although the disease accounts for about 20% of all deaths in developed countries and high levels of morbidity, in most cases the disease is clinically silent. Autopsy studies reveal that more than half of all people over the age of 60 and over a quarter of adults under this age have coronary art...

Infrared and submillimetre observations of nearby Vega-like stars have revealed a number of clumpy, asymmetric dust debris disks. Previous studies using semi-analytical and numerical methods have suggested planetary companions of various mass as the likely cause of most examples of disk asymmetry. In this paper, we modify an N-body symplectic gravitational integrator to include radiation terms ...

This contribution presents the optical spectral properties of FIR-luminous galaxies, whose distinctive feature is often the simultaneous presence in the spectra of a strong Hδ line in absorption and of emission lines (e(a) spectra). A discrepancy between the star formation rate estimated from the FIR luminosity and that derived from the Hα luminosity persists even after having corrected the Hα ...

In laboratory experiments, I study strongly-coupled dusty plasma levitated in a glow-discharge plasma. Dusty plasma is an arrangement of small dust particles in a plasma background of electrons, ions, and neutral gas. The dust particles are negatively charged because they collect electrons and ions from the background plasma. Depending on the experimental setup, the plasma’s electric field can ...

Webster et al (1995) claimed that up to 80% of QSOs may be obscured by dust. They inferred the presence of this dust from the remarkably broad range of B?K optical-infrared colours of a sample of at-spectrum PKS radio QSOs. If such dust is typical of QSOs, it will have rendered invisible most of those which would otherwise been have detected by optical surveys. We used the William Herschel Tele...

Preliminary results of a project aiming at unveiling the nature of the extremely red galaxies (ERGs) 1 found in deep optical-NIR surveys are presented. Very little is known about these objects, the critical issue being whether they are old ellipticals at z>1 or distant star-forming galaxies strongly reddened by dust extinction. We expect to shed light onto the unknown nature of these galaxies b...