Context. We present the results from the analysis of long Suzaku observations (149 ks and 122 ks for XIS and HXD, respectively) of the most X-ray luminous galaxy cluster, RX J1347.5–1145, at z = 0.451. Aims. In order to understand the gas physics of a violent cluster merger, we study physical properties of the hot (∼ 20 keV) gas clump in the southeast (SE) region discovered previously by the Su...

A monopropellant powered free piston hydraulic pump (FPHP) was designed as a human scale (1.0 to 3.0 kW) mobile robotics power supply. The FPHP utilized high concentration hydrogen peroxide, which decomposes into hot gas when exposed to a catalyst, as the monopropellant energy source. Energy was extracted from the hydrogen peroxide and transferred directly to hydraulic fluid by expanding the ho...

We present a ∼52-671μm spectral scan toward Sgr A∗ taken with the PACS and SPIRE spectrometers onboard Herschel. The achieved angular resolution allows us to separate, for the first time at far-IR wavelengths, the emission toward the central cavity (gas in the inner central parsec of the galaxy) from that of the surrounding circum-nuclear disk. The spectrum toward Sgr A∗ is dominated by strong ...

Stars and gas in galaxies, hot intracluster medium, and intergalactic photo-ionized gas make up at most half of the baryons that are expected to be present in the universe. The majority of baryons are still missing and are expected to be hidden in a web of warm-hot intergalactic medium. This matter was shock-heated during the collapse of density perturbations that led to the formation of the re...

A mixture of acetylene, hydrogen and ammonia C2H2/H2/NH3 is used to produce carbon nanotubes (CNTs) by a plasma-enhanced catalytic chemical vapor deposition process with hot-filaments assistance (PE HF CCVD). The investigation of gas phase and surface chemistry is performed by CHEMKINTM software. The concentration of gas phase species on the substrate is presented. Based on this study the role ...

Recent Chandra and Newton observations indicate that there are two-temperature components (T ∼ 8 keV, 0.8 keV) of the diffuse x-rays emitted from deep inside the center of Milky Way. We show that this can be explained by the existence of sterile neutrinos, which decay to emit photons that can be bound-free absorbed by the isothermal hot gas particles in the center of Milky Way. This model can a...

We review the general properties of the intracluster medium (ICM) in clusters that host a cooling flow, and in particular the effects on the ICM of the injection of hot plasma by a powerful active galactic nucleus (AGN). It is observed that, in some cases, the hot plasma produces cavities in the ICM that finally detach and rise, perhaps buoyantly. The gas dynamics induced by the rising bubbles ...

Abstract. In this paper, the forming properties of as-rolled 2A97 Al-Li alloy at 370 ~430 ℃ and 0.02~0.08 MPa/min were studied by Superplastic gas-bulging experiment, microstructure mechanical after deformation evaluated analysed means EBSD, TEM other testing methods. The results show that has good superplastic ability, optimum parameters are 390℃, 0.06 MPa/min, maximum height cap cone is 74 mm...

Although the existence of large-scale hot gaseous halos around massive disk galaxies have been theorized for a long time, there is yet very little observational evidence. We report the Chandra and XMM-Newton grating spectral detection of O VII and Ne IX Kα absorption lines along the sight-line of 4U 1957+11. The line absorption is consistent with the interstellar medium in origin. Attributing t...

In this paper the changes in the heat capacity of cooling towers has been investigated as a result of injecting combustion products of boilers. In the tower, the air is re-heated through mixing with hot flue gas after passing through the heat exchangers. As a result of this process, the draft of the cooling tower is increased. The additional produced draft depends on the ambient temperature and...