We have searched for evidence of soft X-ray absorption by hot metals in the vicinity of the Galaxy in the spectra of a small sample of fifteen type I AGN observed with the high resolution X-ray gratings on board Chandra. This is an extension of our previous survey of hot O vii and O viii absorbing gas in the vicinity of the Galaxy. The strongest absorption signatures within a few hundred km s o...

We present Chandra observations of two nearby radio galaxies in group environments , 3C 285 and 3C 442A. The host galaxies of both sources are involved in mergers with nearby massive galaxies, and the hot gas in the systems is extended along lines joining the interacting galaxies. Both sources show strong evidence for interactions between the radio lobes and the asymmetrical hot gas. We argue t...

We have investigated the structure and evolution of hot gas in the 30 Dor nebula, based on recent X-ray observations. Our deep ROSAT HRI image shows that diffuse X-ray emission arises in blister-shaped regions outlined by loops of HII gas. X-ray spectroscopic data from ASCA confirm the thermal nature of the emission and indicate that hot gas temperature decreases from the core to the halo of th...

We present a detailed analysis of a disc galaxy forming in a high-resolution fully cosmological simulation to investigate the nature of the outer regions of discs and their relevance for the disc formation process. Specifically, we focus on the phenomenon of misaligned disc components and find that the outer disc warp is a consequence of the misalignment between the inner disc and the surroundi...

This paper aims to develop a new forming technique manufacture long semihollow stepped part. Traditionally, hot backward extrusion is used, but this not suitable because it requires very high load act on the die and punch, especially at contact between punch workpiece. As result, service life of low. Therefore, overcome problem needed. A combined bulging–piercing was proposed developed in resea...

Disks in the 6 Myr old cluster η Chamaeleontis were searched for emission from hot H2 . Around the M3 star ECHA J0843.4-7905 we detect circumstellar gas orbiting at ∼2 AU. If the gas is UV-excited, the ro-vibrational line traces a hot gas layer supported by a disk of mass ∼0.03 M⊙ , similar to the minimum mass solar nebula. Such a gas reservoir at 6 Myr would promote the formation and inwards m...

We consider a model for quasar formation in which massive black holes are formed and fuelled largely by the accretion of hot gas during the process of galaxy formation. In standard hierarchical collapse models, objects about the size of normal galaxies and larger form a dense hot atmosphere when they collapse. We show that if such an atmosphere forms a nearly ‘maximal’ cooling flow, then a cent...

DURING COMBUSTION in the gas turbine, sulfur from the fuel reacts with sodium chloride from ingested air at elevated temperatures to form sodium sulfate. The sodium sulfate then deposits on the hot-section components, such as nozzle guide vanes and rotor blades, resulting in accelerated oxidation (or sulfidation) attack. This is commonly referred to as “hot corrosion.” Sulfur in the fuel is gen...

In the gaseous envelope of protogalaxies, thermal instability leads to the formation of a population of cool fragments which are confined by the pressure of a residual hot background medium. In order to remain in a quasi-hydrostatic equilibrium, the residual gas evolves at approximately the virial temperature of the dark matter halo. Its density is determined by the requirements of thermal equi...

Motivated by recent observation of Lanzetta et al. that most luminous galaxies at low redshifts produce Ly absorption at impact parameter l < 160h 1kpc, we propose that these absorbers are clouds con ned by the pressure of ambient hot gas in galactic haloes. We determine the properties of this hot gas and of the absorption systems on the basis of observational and theoretical constraints. The a...