... Zabotin N.A., Naselsky P.D. "Hidden mass" in the universe: evolution of adiabatic disturbances in the hydrogen recombination epoch // Astron.J., 1985, v.62, N 4, p.639-650. ...
... In this paper, we investigate in detail how 2 2.1 ISOTHERMAL COLLAPSE Mo del Assumptions We consider the gravitational collapse of spherical isothermal (temperature T = 10 K) clouds composed of molecular hydrogen with a 10% admixture of atomic helium. ...
... recombination of H, He, C, O, N, Si, and Fe; (2) collisional excitation of HI, CI-IV, and OI-IV; (3) hydrogen and helium bremsstrahlung; (4) vibrational and rotational excitation of H2 ; (5) atomic and molecular cooling due to fine-structure emission of C ...