Showing papers on "Binary system published in 1993"
230 citations
198 citations
TL;DR: In this paper, the spectral decomposition of wave tails at large distances from the system, at the 1.5 post-Newtonian order in the wave field, is investigated.
Abstract: Gravitational wave tails are produced by back-scattering of the outgoing gravitational radiation (emitted by an isolated system) off the curved spacetime associated with the total mass of the system. This paper investigates the spectral (or Fourier) decomposition of gravitational wave tails at large distances from the system, at the 1.5 post-Newtonian order in the wave field. It is shown that the effects of wave tails are (i) to increase the amplitude of the Fourier components of the (linear) waves by a factor linearly depending on the frequency, and (ii) to add to the phase of the waves a supplementary phase depending on the frequency as omega ln omega . The latter frequency-dependent phase introduces a new effect which should be observable in any radiation containing more than one frequency, for instance in the radiation emitted by a binary star system orbiting a Keplerian ellipse with non-zero eccentricity, or in the radiation emitted by an inspiralling (compact) binary star system. We propose in this paper to include the tail-induced effects (i) and (ii) in the matched filters of the future data analysis of inspiralling compact binary signals in laser interferometer gravity-wave detectors (at least in future, very sensitive, such detectors). In, this way, the filters will be highly correlated with the actual signal, and in particular will remain, as the frequency of the signal increases, in accurate phase with it. The contribution of the wave tail in the total gravitational energy emitted by a binary system is also calculated, and a numerical application to the binary pulsar PSR 1913+16 is presented. We find that the tail-induced relative correction in the orbital PTh of the pulsar is equal to +1.65*10-7 (too small to be observed).
193 citations
TL;DR: In this paper, the physical chemistry of the H2SOd/H20 binary system under conditions characteristic of the stratosphere was investigated and the results indicated that some of the hydrates of sulfuric acid may form and persist under the temperature and water partial pressure conditions typical of the high-latitude stratosphere.
Abstract: Laboratory experiments have been carried out to investigate the physical chemistry of the H2SOd/H20 binary system under conditions characteristic of the stratosphere. Water vapor pressures of sulfuric acid solutions (20-70 wt %) and of liquid-solid and solid-solid phase coexistence systems have been measured by mass spectrometry at temperatures between 190 and 240 K. Infrared spectra of the liquid, supercooled liquid, and crystalline hydrates of this system have also been investigated. The results indicate that some of the hydrates of sulfuric acid (Le., HzS0~4H20, HzS0~6.5H20, and H2S0~8H20) may form and persist under the temperature and water partial pressure conditions typical of the high-latitude stratosphere.
154 citations
TL;DR: In this paper, a novel method based on Fourier transform infrared spectroscopy (FTIR) was applied to study sorption and sorption kinetics of p-xylene in ZSM-5-type zeolites as a single component and in a binary component system, in the presence of benzene under conditions close to those of a catalytic run.
86 citations
71 citations
TL;DR: The Taylor-Aris method is applied to calculate binary diffusion coefficients in supercritical carbon dioxide under quasi-infinite dilution conditions by means of the Giddings and Seager chromatographic technique as mentioned in this paper.
66 citations
TL;DR: In this paper, the effects of energy losses by free-free emission and Comptonization as well as those of stellar wind acceleration are considered for colliding stellar winds for the case of a WR+O binary system.
Abstract: Two-dimensional calculations of colliding stellar winds are performed for the case of a WR+O binary system. The effects of energy losses by free-free emission and Comptonization as well as those of stellar wind acceleration are considered. The results show that the interaction region must be a powerful X-ray source. The main dimensional parameters determining the X-ray spectrum and the luminosity of a WR+O binary system are the stellar mass losses, the wind velocities, the separation between the stars and their chemical composition (the X-ray emission characteristics of WN+O and WC+O systems are very different)
53 citations
42 citations
TL;DR: In this paper, the experimental results were successfully correlated with the Peng-Robinson equation of state, and used to predict the vapor-liquid equilibrium (VLE) values for the binary system.
Abstract: Vapor-liquid equilibrium (VLE) values are required in technological applications and are fundamental to separation operations. In this work the authors report VLE data on the three binary mixtures and the ternary system of nitrogen, argon, and methane at 122.89 K. The experimental VLE values on the binary mixtures were correlated with the Peng-Robinson equation of state, and used to predict the VLE values for the binary system. The predicted values were than compared with the experimental results. Calculated pressure and vapor composition from the equation are compared with the ternary mixture data. The experimental results are successfully correlated with the Peng-Robinson equation of state.
42 citations
TL;DR: In this article, the enthalpies of mixing of the liquid alloys in the binary systems Cu-Ce, Ag-ce, Au-cce, and CCA have been measured by high-temperature calorimetry at 1473 ± 2 K. The results obtained for the solid alloys are compared with predicted values from Miedema's semiempirical model.
Abstract: The enthalpies of mixing of the liquid alloys in the binary systems Cu-Ce, Ag-Ce, Au-Ce and in the ternary liquid systems Cu-Ag-Au and Ce-Ag-Au have been measured by high-temperature calorimetry at 1473 ± 2 K. The standard enthalpies of formation of congruently melting inter- metallic compounds in the considered binary systems have also been determined. The results obtained for the solid alloys are compared with predicted values from Miedema's semiempirical model. Interpretation of the data for the two ternary liquid alloy systems has been based on a model which includes contributions from two-body and three-body interactions which occur in the solutions.
TL;DR: In this article, the authors measured the densities and viscosities of the binary mixtures compared of butylamine, benzylamine and water and correlated them with a Redlich-Kister-type equation in terms of molar fraction.
Abstract: Densities and viscosities of the binary mixtures compared of butylamine, benzylamine, and water are measured at 303.15, 313.15, and 323.15 K over the entire molar fraction range. The excess volume and viscosity deviation are calculated from the experimental data and correlated by a Redlich-Kister-type equation in terms of molar fraction. McAllister's models are also used to correlate the kinematic viscosities
TL;DR: In this article, isothermal sections of metal-metal-oxygen subsystems of the Al-Ca-Mg-Si-O system were calculated from available thermodynamic descriptions of binary alloy and oxide systems.
Abstract: Isothermal sections of metal-metal-oxygen subsystems of the Al-Ca-Mg-Si-O system were calculated from available thermodynamic descriptions of binary alloy and oxide systems. A comparison with experimental data on the Al-Ca-O system came out less satisfactorily mainly due to the thermodynamic description of the Al-Ca liquid.
TL;DR: In this paper, the mass of Sk 160, the optical counterpart of SMC X-1, is estimated for both components of the binary system, with and without non-Keplerian velocity corrections.
Abstract: New spectroscopy of Sk 160, the optical counterpart of SMC X-1, is presented. Improved mass estimates are derived for both components of the binary system, with and without non-Keplerian velocity corrections. The primary star is found to have a mass of 17.2 ± 0.6 M ○ ., with a best estimate for the mass of the compact component of 1.6 ± 0.1 M ○ ., which is within the theoretical mass range for neutron stars. Studies of line profile variations in the primary show that the effect of X-ray heating on the inner hemisphere is present but not dramatic. Distance estimates are derived, the lowest of which implies a sub-Eddington luminosity for the X-ray source, and places the system on the near side of the SMC
TL;DR: A list of references from a literature retrieval presenting experimental mutual solubilities and phase equilibria of binary systems of carbon dioxide and monoalcohols is given in this paper, which includes the pressure and temperature ranges, the number of data points, and the references.
TL;DR: The densities and viscosities of binary mixtures of cyclohexane + picoline have been measured at 298.15 and 313.15 K over the whole composition range as mentioned in this paper.
TL;DR: An empirical mixing rule for the Helmholtz function with ternary as well as binary non-randomness parameters was proposed based on the density-dependent local composition concept in this paper, which successfully correlated the phase equilibria of the carbon dioxide-ethanol-water system.
Abstract: Phase equilibria for the carbon dioxide-ethanol system and the carbon dioxide-ethanol-water system were measured to provide the thermodynamic base for the extraction of ethanol from its aqueous solutions using near-critical carbon dioxide as solvent. The experiments were carried out at 283 K–298 K and 5–7 MPa, including extraction conditions and solvent-recovery conditions in a wide range of ethanol concentration.An empirical mixing rule for the Helmholtz function with ternary as well as binary non-randomness parameters was proposed based on the density-dependent local composition concept. A correlation model was derived by a combination of the mixing rule with the Helmholtz function obtained from the Patel-Teja equation of state. The model successfully correlated the phase equilibria of the carbon dioxide-ethanol-water system.
TL;DR: In this article, the Wilson and UNIQUAC models were used to determine experimental activity coefficients and interaction parameters for three binary mixtures of benzene with polynuclear aromatic compounds.
Abstract: Separation of organic close-boiling or close-melting components from a mixture is a challenging task in some chemical engineering processes, such as crystallization and extraction. With the present trend in the petroleum industry toward heavier feedstocks and coal-derived liquids, there is a strong need for expansion of the small database of thermodynamic data on heavier compounds that presently exists. Solid-liquid equilibrium phase diagrams for three binary mixtures of benzene with polynuclear aromatic compounds (fluorene, dibenzofuran, and dibenzothiophene) have been measured by a dynamic method in the temperature range from 0 to 80C. These binary data plus previously published data derived from calorimetric studies were used to determine experimental activity coefficients and interaction parameters using the Wilson and UNIQUAC models. The resulting set of interaction parameters gave a good representation of the experimental binary data and ternary data at 50C, but were not generally satisfactory for predicting solid-liquid equilibrium in ternary systems at lower temperatures.
TL;DR: In this paper, the mutual binary solubilities have been measured for derivatives of pyridine and piperidine for 36 water-organic pairs at temperatures of 0-90 o C.
Abstract: Mutual binary solubilities have been measured for derivatives of pyridine and piperidine. Data are given for 36 water-organic pairs at temperatures of 0-90 o C. It was found that 9 binary systems were miscible in all proportions over the temperature range, 14 showed partial solubility over the entire temperature range, and 13 were partially soluble at higher temperatures, but had lower critical solution temperatures and were completely miscible with water at lower temperatures. The very large number of systems exhibiting a lower critical solution temperature indicates that this feature is characteristic for these compounds
TL;DR: In this paper, the ternary phase of the binary system BaSiO3-SiO2 has been identified, and the excess thermodynamic functions have been determined to calculate the Ternary system of the two binary systems.
TL;DR: The phase diagram of the plastic crystals pentaglycerin (PG) and tris(hydroxymethyl)-aminomethane has been established by means of thermal analysis and X-ray powder diffraction from room temperature to the liquid state as mentioned in this paper.
TL;DR: In this paper, the second virial coefficients of a binary gas mixture with helium and argon were measured at 290, 300, and 310 K using an accurate method which has been described in detail previously.
Abstract: Using an accurate method which has been described in detail previously, second virial coefficients of methane, fluoromethane, difluoromethane, trifluoromethane, and tetrafluoromethane and their binary mixtures with helium and argon have been measured at 290, 300, and 310 K. Second virial coefficients characterize the molecular interactions in a binary gas mixture.
TL;DR: In this article, the authors reported isothermal vapor-liquid equilibrium (VLE) data for the binary systems toluene/naphthalene and cyclohexane/nanophthalene systems which can be considered as model compounds for coal liquids.
Abstract: In this study, the authors report isothermal vapor-liquid equilibrium (VLE) data for the toluene/naphthalene and cyclohexane/naphthalene systems which can be considered as model compounds for coal liquids. Vapor-liquid equilibrium data for the binary systems toluene/naphthalene and cyclohexane/naphthalene were measured at 0-1,300 kPa and 370-500 K using a 1-L stirred autoclave system. All pure components and binary P-T data were well fitted with a three-constant Antoine equation. The data can bee accurately correlated with the modified Peng-Robinson equation of state using density-dependent mixing rules to describe both the vapor and liquid phases. The binary interaction parameters and correction factors for the equation of state are reported at each isotherm.
TL;DR: In this article, the Redlich-Kister type equation was used to calculate the changes in isentropic compressibility, molar refractivity, and viscosity of 2-methoxyethanol/alcohol mixtures.
Abstract: Densities, refractive indexes, speed of sound data, and viscosities of 2-methoxyethanol/alcohol mixtures are determined at 298.15, 303.15, and 308.15 K. Density results are used to calculate excess molar volume. The results of speed of sound data, refractive index, and viscosity are used to calculate the changes in isentropic compressibility, molar refractivity, and viscosity. These properties are fitted to the Redlich-Kister type equation. Intermolecular interactions in mixtures of 2-methoxyethanol with alcohols have led to rather widely varying excess molar volumes from negative to large positive values, depending on the size of the alcohols. McAllister's three-body-interaction model is used to correlate the binary kinematic viscosities, and results are compared with those from Lobe's relation. Furthermore, speed of sound data for mixtures are calculated from the theoretical relation of Auerbach
TL;DR: Saturation temperatures and meta-stable zone widths have been measured for the n-alkanes from C 18 H 38 to C 29 H 60 and for binary mixtures of C 20 H 42 and C 22 H 46 crystallized from n-dodecane and m-xylene solvents.
TL;DR: In this paper, the authors measured the Isobaric vapor-liquid equilibrium (UE) data for the binary system acetone-water at 0.2-1.013 bar and for the acetonewater-salt systems at 1.1-3.5 bar and at different salt concentrations.
Abstract: Isobaric vapor-liquid equilibrium (UE) data were measured for the binary system acetone-water at 0.2-1.013 bar and for the acetone-water-salt systems at 1.013 bar and at different salt concentrations. All the salts investigated in this work, LiCl, NaBr, KBr, and Kl, exibited a salting out effect which increases with the increasing salt concentration. The obtained data were and for the estimation of the interaction parameters between acetone and the salt ions by applying the extended UNIQUAC method of Sander et al. These estimated interaction parameters were used with other parameters presented in the literature in the UE calculations