Mass outflow from the symbiotic binary RS Oph during its 2021 outburst N. A. Tomov, M. T. Tomova, K. A. Stoyanov, T. R. Bonev, R. K. Zamanov, I. Kh. Iliev, Ya. M. Nikolov, D. Marchev, D. V. Bisikalo and P. V. Kaygorodov A&A, 671 (2023) A49 Published online: 06 March 2023 DOI: 10.1051/0004-6361/202243068