95.85.−e Astronomical observations (additional primary heading(s) must be chosen with these entries to represent the astronomical objects and/or properties studied) 98.52.−b Normal galaxies; extragalactic objects and systems (by type) 98.62.−g Characteristics and properties of external galaxies and extragalactic objects

A.E. Volvach, L.N. Volvach, M.G. Larionov “Multi-frequency radio monitoring on RT-22 in Simeiz: variability, structure and gravitational-wave prospects of binary supermassive black holes and galactic kilomasers” Phys. Usp. 69 (3) (2026)
95.55.Jz, 98.58.Ec, 98.62.−g (all)
O.K. Silchenko “The origin of morphological types of galaxies” Phys. Usp. 69 (3) (2026)
98.52.−b, 98.62.−g, 95.85.−e (all)
A.V. Tutukov, S.V. Vereshchagin “Destruction of astronomical systems: theory and observations” Phys. Usp. 66 859–884 (2023)
96.25.−f, 98.20.−d, 98.52.−b (all)
O.K. Sil’chenko “Empirical scenarios of galaxy evolution” Phys. Usp. 65 1224–1247 (2022)
98.52.−b, 98.62.Ai, 98.62.Js (all)
N.S. Kardashev, I.D. Novikov et al “Review of scientific topics for Millimetron space observatory” Phys. Usp. 57 1199–1228 (2014)
07.87.+v, 95.55.−n, 97.10.−q, 98.62.−g, 98.80.−k (all)
V.P. Reshetnikov “Sky surveys and deep fields of ground-based and space telescopes” Phys. Usp. 48 1109–1127 (2005)
95.80.+p, 98.62.−g, 98.65.−r (all)
M.S. Longair, R.A. Sunyaev “The universal electromagnetic background radiation” Sov. Phys. Usp. 14 569–599 (1972)
98.70.Vc, 98.54.Aj, 95.85.−e, 98.70.Lt, 98.35.Jk (all)
M.M. Butslov, V.V. Prokof’eva et al “Image converters, light amplifiers and their application in science and technology” Sov. Phys. Usp. 14 524–529 (1972)
42.79.Ls, 95.85.−e, 95.55.−n (all)

PACS numbers