A Stringent Limit on Variation of the Fine-Structure Constant Using Absorption Line Multiplets in the Early Universe     

T. D. Le 《Astrophysics》2016,59(2):285-291

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Predicting Changes in the Radio Emission Fluxes of Extragalactic Sources     

A. L. Sukharev  M. I. Ryabov  G. I. Donskikh 《Astrophysics》2016,59(2):213-226

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Distribution of Pulsars in the Galaxy     

H. A. Andreasyan  R. R. Andreasyan  G. M. Paronyan 《Astrophysics》2016,59(1):57-67

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Fractality of Isotherms of the Cosmic Microwave Background Based on Data from the Planck Spacecraft     

A. A. Mylläri  A. A. Raikov  V. V. Orlov  P. A. Tarakanov  V. N. Yershov  M. Y. Yezhkov 《Astrophysics》2016,59(1):31-37

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Possible Reasons for the Slow Rotation of BF Ori     

S. G. Shulman 《Astrophysics》2016,59(1):20-30

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Isentropic “Shock Waves” in Numerical Simulations of Astrophysical Problems     

G. S. Bisnovatyi-Kogan  S. G. Moiseenko 《Astrophysics》2016,59(1):1-10

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White Dwarf Stars as Polytropic Gas Spheres     

M. I. Nouh  A. S. Saad  W. H. Elsanhoury  A. A. Shaker  B. Korany  T. M. Kamel 《Astrophysics》2016,59(4):540-547

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Analysis of the activity of the blazar BL Lacertae over the period 1998–2011     

K. S. Strigunov  A. V. Zhovtan 《Astronomy Letters》2016,42(7):417-427

In 1998–2011 the blazar (active galactic nucleus) BL Lacertae was observed at Crimean Astrophysical Observatory (CrAO) with the second-generation GT-48 Cherenkov telescope at energies >1 TeV with a total significance of 11.8σ. More than 20 flares and a fourfold change in yearly mean fluxes (>1 TeV) were recorded. The optical (B band) data obtained at CrAO and the TeV data are shown to correlate in some time intervals. The optical data are also compared with the X-ray RXTE/ASM (2–10 keV) data. In addition, the data from GT-48 are compared with the gamma-ray fluxes recorded by the Fermi LAT space telescope (0.1–300 GeV). The 2009 flare at TeV and Fermi energies has been studied. As a result, it has been found that as the activity rises the increase in flux at high energies exceeds its increase at low energies. This conclusion may be related to the conversion mechanism of particle acceleration. This is consistent with the results of studies for a similar object, 1ES 1426+428.  相似文献   

Orbital motions and light curves of young binaries XZ Tau and VY Tau     

A. V. Dodin  N. V. Emelyanov  A. V. Zharova  S. A. Lamzin  E. V. Malogolovets  J. M. Roe 《Astronomy Letters》2016,42(1):29-40

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Analysis of the Z distribution of young objects in the Galactic thin disk     

V. V. Bobylev  A. T. Bajkova 《Astronomy Letters》2016,42(1):1-9

We have obtained new estimates of the Sun’s distance from the symmetry plane Z _⊙ and the vertical disk scale height h using currently available data on stellar OB associations, Wolf–Rayet stars, HII regions, and Cepheids. Based on individual determinations, we have calculated the mean Z _⊙ = ?16 ± 2 pc. Based on the model of a self-gravitating isothermal disk for the density distribution, we have found the following vertical disk scale heights: h = 40.2 ± 2.1 pc from OB associations, h = 47.8 ± 3.9 pc from Wolf–Rayet stars, h = 48.4 ± 2.5 pc from HII regions, and h = 66.2 ± 1.6 pc from Cepheids. We have estimated the surface, Σ = 6 kpc^?2, and volume, D(Z _⊙) = 50.6 kpc^?3, densities from a sample of OB associations. We have found that there could be ～5000 OB associations in the Galaxy.  相似文献