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Burlak, M. A.; Henden, A. A.
Based on visual estimates by AAVSO observers, we have constructed light curves for 80 Galactic novae flared up in 1986–2006 and determined the photometric parameters m_{vis}(max), t_{2}, and t_{3} for 64 novae. Using the empirical relation M_{V} (max) = −10.66(±0.33) + 2.31(±0.26) × log t_{2}, we have obtained the absolute magnitudes at maximum and apparent distance moduli of the novae.
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By
Burlak, M. A.
Using photometric data for Galactic novae, we compared the Sharov (1963) and Schlegel et al. (1998) interstellar extinction maps. We found the distances and extinctions for 64 novae.
By
Avakyan, R. M.; Haroutunyan, G. H.
1 Citations
The recently discovered accelerated expansion of the universe is of current interest in theoretical research on the evolution of the universe. The cause of this behavior is presumably the presence of dark energy, which has been estimated to form up to 70% of the universe and generates a “repulsive force.” In this paper a cosmological model is constructed which takes the dark energy into account in a JordanBransDicke tensorscalar model with a dominant, nonminimally coupled scalar field in the presence of a cosmological scalar. The radiation dominant epoch is discussed.
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By
Akopian, A. A.
1 Citations
The frequency of flares is one of the basic characteristics of the activity of flare stars. Longterm variations in the flaring frequency are determined by comparing the distribution functions of the flaring frequency for systems of flare stars with different ages.
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By
Vashkov’yak, M. A.; Teslenko, N. M.
We continue to analyze the periodic solutions of the singly averaged Hill problem. We have numerically constructed the families of solutions that correspond to periodically evolving satellite orbits for arbitrary initial values of their eccentricities and inclinations to the plane of motion of the perturbing body. The solutions obtained are compared with the numerical solutions of the rigorous (nonaveraged) equations of the restricted circular threebody problem. In particular, we have constructed a periodically evolving orbit for which the wellknown LidovKozai mechanism manifests itself, just as in the doubly averaged problem.
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By
Bajkova, A. T.; Pushkarev, A. B.
Maps of the radio source 3C 120 obtained from VLBA+ observations at 8.4 GHz at five epochs in January–September 2002 are presented. The images were reconstructed using the maximum entropy method and the Pulkovo VLBImager software package for VLBI mapping. Apparent superluminal motions of the brightest jet knots have been estimated. The speeds of jet knots decreases with distance from the core, changing from (5.40±0.48)c to (2.00±0.48)c over 10 mas (where c is the speed of light) for a Hubble constant of 65 km s^{−1} Mpc^{−1}. This can be explained by interaction of the jet with the medium through which it propagates.
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By
Vereshchagin, S. V.; Reva, V. G.; Chupina, N. V.
The Hyades Cluster is used to analyze details of the ADdiagram method developed in our earlier works and applied to the corona of the Ursa Major stream. Hipparcos data are used to analyze the kinematics of the Hyades Cluster and determine its apex. Evidence for rotation of the cluster is presented.
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By
Krikorian, R.; Sedrakian, D. M.
1 Citations
The basic equations of type II superconductors have been obtained by adopting London’s phenomenological approach. The generation of the electromagnetic field in a superconductor at rest in a stationary universe has been investigated using the method of anholonomic frames. The Newtonian formulation of the problem has also been studied.
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