Umbral oscillations in the photosphere - A comprehensive statistical study M. Berretti, M. Stangalini, G. Verth, V. Fedun, S. Jafarzadeh, D. B. Jess and F. Berrilli A&A, 697 (2025) A156 Published online: 13 May 2025 DOI: 10.1051/0004-6361/202453176