ON THE QUESTION OF THE HELIUM ABUNDANCE IN ORION A MEASURED BY RADIO RECOMBINATION LINES. AND THE PRIMORDIAL HELIUM ABUNDANCE

by A. P. Tsivilev
Published 2020-11-01

THE EFFECTIVE TEMPERATURE DETERMINATION OF O-B STARS BY H AND He RADIO RECOMBINATION LINES OBSERVATIONS

by A. P. Tsivilev
Published 2017-07-01

THE PHYSICAL CONDITIONS OF THE CENTRAL PART OF ORION A HII REGION BY THE RADIO RECOMBINATION LINES AT 8 AND 13 MM

by A. P. Tsivilev, S. Yu. Parfenov, V. V. Krasnov
Published 2016-12-01

PHYSICAL PARAMETERS OF HII/PDR COMPLEX IN ORION BAR ESTIMATED BY OBSERVATIONS OF 8 MM RECOMBINATION LINES. EFFECTIVE TEMPERATURE OF 1 С Ori STAR

by A. P. Tsivilev, S. Yu. Parfenov, A. M. Sobolev
Published 2014-10-01

PRIMORDIAL HELIUM ABUNDANCE BY RRL: NEW RESULT

by A. P. Tsivilev, R. L. Sorochenko, St. Cortiglioni, S. Poppi, St. Montebugnoli
Published 2017-03-01