Dust particles immersed within a plasma environment, such as those in protostellar clouds, planetary rings or cometary environments, will acquire an electric charge. If the ratio of the inter-particle potential energy to the average kinetic energy is high enough the particles will form either a “liquid” structure with short-range ordering or a crystalline structure with long range ordering. Man...

We report on analytical and simulat n studies of mi ophy processes that trigger phase transitions in a dusty plasma subject to ion streaming. For res below the critica ure Pc for condensation, the grains acquire a large random kinetic energy and form a we upled fluid. P is increased to greater than Pc, the grains lose their kinetic energy and reach a strongly coupled crystal e state. The ust he...

We present near-infrared spectroscopy and Hubble Space Telescope (HST) imaging of ERO J164023+4644, an Extremely Red Object (ERO) with (R − K) = 5.9 at z = 1.05 that has been detected by ISO at 15μm. ERO J164023 appears to be a disk galaxy, with an optical/infrared spectral energy distribution which appears to be strongly reddened by dust (Lfir/Lb < ∼ 200; Av ∼ 5). The combination of the narrow...

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 estimate the star-formation rates and the stellar masses of the Extremely Red Objects (EROs) detected in a ≈ 180 arcmin Ks-band survey (Ks ≈ 20mag). This sample is complemented by sensitive 1.4GHz radio observations (12μJy 1σ rms) and multiwaveband photometric data (UBV RIJ) as part of the Phoenix Deep Survey. For bright K < 19.5mag EROs in this sample (I − K > 4mag; total of 177) we use pho...

Nevertheless, reducing dust is a reasonable risk-reduction strategy for addressing occupational coccidioidomycosis. On the basis of our findings, we recommended that prison management weigh the advantages and disadvantages of various environmental mitigation efforts to reduce dust exposures. Our recommendations included providing employees with education and training about coccidioidomycosis sy...

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...