We have investigated the orbital phase dependence of the X-ray spectrum of the High Mass X-ray Binary pulsar GX 301–2. Here we present the results from a spectral analysis of two sets of observations of GX 301–2 with the Rossi X-ray Timing Explorer (RXTE). Of particular interest are the variations of the absorption column density and the iron line flux along with other parameters of the spectra...

We have used integral field echelle spectroscopy with the DensePak fiber-optic array on the KPNO WIYN telescope to observe the central 27 × 43 of the globular cluster M92 in the Na I D wavelength region at a spatial resolution of 4. Two interstellar Na I absorption components are evident in the spectra at LSR velocities of 0 km s (Cloud 1) and -19 km s (Cloud 2). Substantial strength variations...

A study was conducted to measure the values of m.t.c and N an absorption column. Values were in range 10-5, while those 10-7. The trends with variables confirmed previous studies. However, they not m.t.c. Pressure variance suggested as reason. Error assessed at a percentage 15% for m.t.c, under 2% pressure. Using other methods than only measuring concentration solute Hempl apparatus recommended.

Collecting and analysing X-ray photons over either spatial or temporal scales encompassing varying optical depth values requires knowledge about the distribution. In case of sufficiently broad distribution, assuming a single column density value leads to misleading interpretation source emission properties, nominally its spectral model. We present model description for interstellar medium absor...

Hot water supplies account for approximately 30% of energy consumption in residential sectors of Japan; it is therefore important that the energy efficiency of water heaters be improved. Absorption heat pump water heaters are expected to provide greater efficiency than conventional water heaters that use gas. However, the absorption systems have larger volumes and are not widely accepted in the...

We have studied a spectrum of Q0122+0338 (ze ∼ 1.202) obtained by the Faint Object Spectrograph (FOS) on board the Hubble Space Telescope (HST ). We present the analysis of three associated (za ∼ ze) absorption systems at z = 1.207, 1.199 and 1.166. The most complex of these at za ∼ 1.207 shows strong absorption from the highly ionized transitions of Lyα, Lyβ, N V, O VI, Si III, Si IV, and poss...

co2 emissions from combustion flue gases have turned into a major factor in global warming. post-combustion carbon capture (pcc) from industrial utility flue gases by reactive absorption can substantially reduce the emissions of the greenhouse gas co2. to test a new solvent (ait600) for this purpose, a small pilot plant was used. this paper presents the results of studies on chemical methods of...