[en] With the 6-m telescope radial velocities have been determined for 53 objects on Kostyuk's list of galaxies with outer ring structure

[en] An analysis of the infrared brightness distribution across the disk of the Wolf--Rayet star in the V444 Cyg eclipsing binary system yields source functions and temperature profiles in its atmosphere. The results are compared against model calculations for extended atmospheres

[en] The velocity field in the central region of Mrk 538 is determined from image-tube spectrograms taken with the prime-focus grating spectrograph of the 6-m telescope. Noncircular gas motions are present near the position angle (150₀) of the line of nodes. The region of the galaxy interior to 1.3-kpc radius has a mass of up to 4.3 x 10₉ M/sub sun/. Tides from the companion galaxy may prevent the inner and outer parts of the disk from being coplanar. The central velocity gradient is 131 km sec^-₁ kpc^-₁

[en] Vacuum polarization of nonconformal and conformal fields would render the de Sitter solution quasistable. An inhomogeneous perturbation above threshold could trigger a transition to the scalaron stage. Particle creation in curvature fluctuations could result in a homogeneous transition

[en] The possible interpretations of the relatively large antiproton flux detected in primary cosmic rays near the earth are discussed, with emphasis on antiproton production in young supernova envelopes

[en] The equation for the cosmic-ray energy distribution function yields the sound velocity and compressibility of the cosmic-ray gas

[en] The flaring H²O maser radio source observed in Orion (at V = +8 km/sec) was partially unsaturated. The anticorrelation between the line width and intensity, the profile asymmetry, and the changes in the visibility function within the profile are attributable to blending of two components, one of which experienced the flare. The measured polarization parameters imply an electron density n/sub e/< or approx. =3 x 10₅ cm^-₃ in the source and a magnetic field strength Broughly-equal10^-₂ gauss directed along position angle phiroughly-equal-15 ₀. A physical model of the source is proposed: a gas cloud would be compressed, heated, and accelerated by strong stellar wind arriving from a young star (possibly the source IRc4). The CCr process would pump the maser, with n/sub H/roughly-equal10₁₁--10₁₂ cm^-₃. If the cloud is a remnant of a circumstellar gas-dust disk, the disk magnetic field should be predominantly azimuthal

[en] An 8-mm radiometer system with a degenerate parametric amplifier was launched on the high-apogee (7 x 10⁵ km) Prognoz 9 satellite in July 1983 to map the large-scale anisotropy of the cosmic background radiation. Early results indicate that the amplitude of the dipole and any quadrupole component is measurable to 0.1-mK rms accuracy, and by the end of the experiment the error should be lower. With 95% confidence the strip of sky investigated thus far exhibits no quadrupole component above the 0.2-mK level

[en] Hot, second-generation cosmological ''pancakes'' of neutrinos and gas may have formed and subsequently have evolved into hot, gravitationally bound gas-neutrino clouds. These ''phantom clusters'' would have a temperature, mass, and other parameters comparable with those of ordinary clusters of galaxies, but would contain no visible galaxies (or hardly any). Searches for phantom clusters could rely on x-ray surveys or analysis of microwave-background temperature fluctuations

[en] The nuclear-reaction kinetics in the density range rho₀ = 10⁷--10⁹ g/cm³ at constant pressure is analyzed to provide the structure of the nonsteady deflagration front in an exploding C--O stellar core. If rho₀>rho/sub e/roughly-equal5x10⁷ g/cm³, the combustion of C¹² will culminate in nuclear statistical equilibrium. At low densities the burning products will be nuclides having A< or =30. The applicability of an approximate nuclear-kinetics description is discussed