Contents

Astronomy Reports

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Vol. 66, No. 5, 2022

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Binary Clusters: Theory and Observations

S. V. Vereshchagin, A. V. Tutukov, N. V. Chupina, E. S. Postnikova and M. D. Sizova p. 361  abstract

Constraints on the Number of Primordial Black Holes Due to Interaction with Dust

A. N. Melikhov and E. V. Mikheeva p. 387  abstract

Luminosity Outbursts in Protoplanetary Discs: A Three-Phase Astrochemical Model

E. V. Borshcheva and D. S. Wiebe p. 393  abstract

Variations of the Orbital Period of an Eclipsing Binary W Del

A. I. Khaliullina p. 419  abstract

Instability in the System of the Distant Post-AGB Star LS III +52°24 (IRAS 22023+5249)

V. G. Klochkova, A. S. Miroshnichenko, V. E. Panchuk, N. S. Tavolzhanskaya and M. V. Yushkin p. 429  abstract

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