Contents
Astronomy Letters

Vol. 25, No. 12, 1999 December

Simultaneous English language translation of the journal is available from “ / Interperiodica” (Russia).
Distributed worldwide by the American Institute of Physics. Astronomy Letters ISSN 1063-7737.

UBV Photometry of the Seyfert Galaxy Akn 120 in 1974–1999

V. T. Doroshenko and V. M. Lyuty p. 771  abstract

Spectral Slopes of the Emission in “Fast” and “Slow” Optical Outbursts of the Blazar 3C 345

E. T. Belokon and M. K. Babadzhanyants p. 781  abstract

Autocorrelation Function of Microlensed Radio Emission

V. I. Zhdanov p. 793  abstract

Parameters of Four Multiple Systems from Speckle Interferometry

I. I. Balega, Yu. Yu. Balega, K.-H. Hofmann, A. A. Tokovinin, and G. P. Weigelt p. 797  abstract

Radial-Velocity Variations in Pulsating Ap Stars: Pr III and Nd III Lines in the Spectrum of Equ

I. S. Savanov, V. P. Malanushenko, and T. A. Ryabchikova p. 802  abstract

BD+40° 175: A Visual Binary with Two Magnetic Components

V. G. El’kin p. 809  abstract

Joint Particle Acceleration by Turbulence and a Shock Front in a Steady-State Stellar Wind

I. N. Toptygin p. 814  abstract

Shock Acceleration of Iron with Allowance for Its Stripping in Gradual Solar-Energetic-Particle Events

V. M. Ostryakov and M. F. Stovpyuk p. 819  abstract

Influence of the Densities of the Components of Local Interstellar Medium
on the Magnetic-Field Structure at the Heliospheric Interface

E. V. Barsky p. 825  abstract

Dispersion Properties and Excitation Efficiency of a Surface Wave in the Solar Atmosphere

L. A. Gasilova and Yu. V. Petukhov p. 833  abstract

Author Index to Volume 25, 1999 p. 842

Contents of Volume 25, 1999 p. 852

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