Large-scale mapping of the IRAS 0042 + 5530 region in the 12CO (J = 1−0) and 13CO (J = 1−0) molecular lines

We present new radio observations of molecular lines in the region of high mass star formation, namely G122.0-7.1. A large-scale map of the emission observed in the ¹²CO (J = 1−0) and ¹³CO (J = 1−0) lines covers the area of 15′ × 9′, revealing two dense regions. The molecular bipolar outflows have been resolved in ASO1 region. It is associated with the known candidate YSO nearby IRAS 0042 + 5530. Also, a new dense region has been discovered in the North-Western part of the G122.0-7.1 at a distance of 5′ from IRAS 0042 + 5530. Its position is close to the peak of 4850 MHz emission. The text was submitted by the authors in English.     

Metal cation exchange reactions of ore minerals in Fe–Mn crusts of the Marcus Wake Rise (Pacific Ocean) in aqueous–salt solutions

It is shown that the reaction ability of metal cations of ore minerals in Fe–Mn crusts of the Marcus Wake Rise increases in the following manner: (Co²⁺ < Cu²⁺ < Ni²⁺) < (Mg²⁺ < Mn²⁺ < K⁺ ≈ Ca²⁺ ≈ Na⁺). The composition of the exchange complex of the ore minerals is constant and includes these metal cations. Ca²⁺ and Na⁺ are major contributors to the exchange capacity of the ore minerals. The capacity of the ore minerals by cations of alkali and base metals is 0.43–0.60 and 2.08–2.70 mg-equiv/g, respectively. The exchange capacity of the ore minerals by cations of base metals increases linearly with the increase in the MnO₂ content of the crust and does not depend on the geographical locations of the Marcus Wake guyots.     

NAO catalog of geocentric state vectors of geosynchronous space objects

Results of observations of geosynchronous space objects for the period of 2008–2010 are presented. The estimation of observation data errors is given. The process of calculating the state vectors is briefly described. The results of comparison of the Nikolaev Astronomical Observatory catalog with the NORAD orbit catalog are presented.     

Investigations of Lateral Sedimentation and Water Mass Properties in the Tropical Atlantic during Cruise 60 of the R/V Akademik Ioffe

Oceanology - Herein we provide information on the integrated geological, geophysical, sedimentological, and hydrophysical investigations and passing meteorological and biological observations, as...     

Searching for the host galaxy of GRB 920925C

GRB 920925C is probably the first cosmic gamma-ray burst with an optical afterglow detected from archival data. We present the results of our observations with the Shajn mirror telescope of the Crimean Astrophysical Observatory aimed at searching for the host galaxy at the afterglow location; we have determined the boundaries of distances to the possible host galaxy.     

Investigation of the Modern Lateral Sedimentation on the Argentine Continental Slope during Cruise 79 of the R/V Akademik Mstislav Keldysh

Oceanology - Herein we provide information on the sedimentological and paleoceanographic research on the Argentine Patagonian continental slope during cruise 79 of the R/V Akademik Mstislav Keldysh...     

Search for dark matter using the phenomenon of strong gravitational lensing

We provide a brief overview of the methods for estimating the dark matter content in the Universe based on the phenomenon of strong gravitational lensing—the method of macroimage flux ratio anomalies and the method based on an analysis of the probability distribution for the magnification of macroimages due to microlensing events. Both methods require the specification of a macrolens model, knowledge of the spatial structure or at least the effective size of the source, and numerical simulation of microlensing events followed by a comparison of the simulation results with observational data. Using the quadruply lensed quasar Q2237+0305 as an example, we show the effect of the spatial source structure on the shape of the magnification probability distribution in microlensing events. We also point out the need to take into account the contribution from the intrinsic quasar variability to the observed light curve and to develop a physically justified algorithm to fit the observational data. For the first time, based on all the available observations of Q2237+0305, we have constructed the magnification probability histograms for all four macroimages. We analyze the possibility of using them to estimate the content of continuously distributed (dark) matter in the galaxy Q2237+0305 at a distance from its nucleus that corresponds to the macroimage locations.     

Bipolar molecular outflow in IRAS 17233-3606

The high-mass star-forming region IRAS 17333-3606 has been mapped in the ¹³CO (J = 2–1) and C¹⁸O (J = 2–1) lines in the submillimeter wavelength range using the APEX (Chile) radio telescope. The analysis of the low-velocity part of the molecular outflow has been carried out, and the main parameters of the outflow have been determined. We have used a novel approach for calculating parameters of the low-velocity part of bipolar molecular outflows in molecular clouds. The approach excludes the influence of the surrounding cloud on the parameters of the outflow. The mass of the low-velocity part is much greater than that of the high-velocity part of the molecular outflow, while their energies are comparable. The core of the young stellar object is significantly deformed by the impact of the bipolar outflow.