Rieger-type periodicity in the total irradiance of the Sun as a star during solar cycles 23–24E. Gurgenashvili, T. V. Zaqarashvili, V. Kukhianidze, A. Reiners, R. Oliver, A. F. Lanza and T. ReinholdA&A, 653 (2021) A146DOI: https://doi.org/10.1051/0004-6361/202141370