Buttler, J. Vigeesh, G. Milić, I. van Noort, M. Díaz Castillo, S. M. Díaz Baso, C. J. Riva, Fabio Matteo Steiner, Oskar 2026 Context. Granular collapse is a ubiquitous process of granular evolution on the solar surface, but it is hard to analyze in sufficient spatial, temporal, and spectral detail. Aims. We analyzed the change in physical conditions in the photosphere during a specific granular collapse event and the subsequent atmospheric response. Methods. We contrasted a high-resolution radiative magnetohydrodynamic simulation of a granular collapse performed using the CO5BOLD code with the recent integral field unit observations carried out using the MiHI instrument at the Swedish 1-m Solar Telescope. Results. The observed and simulated granular collapses are remarkably similar. Specifically, they both exhibit the signature of a wave pulse excited in the deep photosphere that is visible up to the temperature minimum. This wave is detectable through a blue-wing emission in the observed and synthetic Na I D1 line. We also estimated the acoustic energy flux carried by the wave and analyzed its initiation. Conclusions. Combining high-resolution integral field unit spectropolarimetry and state-of-the-art simulations of the solar lower atmosphere, this study showcases our current capabilities in identifying specific physical processes taking place during granular collapse and their impact on the atmosphere above. application/pdf https://n2t.net/ark:/12658/srd1337013 https://susi.usi.ch/global/documents/337013 https://susi.usi.ch/documents/337013/files/aa60849-26_generated_rev4_forth.pdf eng info:eu-repo/semantics/altIdentifier/issn/0004-6361 info:eu-repo/semantics/altIdentifier/issn/1432-0746 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202660849 info:eu-repo/semantics/altIdentifier/ark/12658/srd1337013 info:eu-repo/semantics/openAccess CC BY Astronomy & Astrophysics. - 2026, vol. 714 Waves Sun: granulation Sun: magnetic fields Sun: photosphere info:eu-repo/classification/udc/52 Wave excitation by a collapsing granule : insights from integral field unit observations and high-resolution radiative magnetohydrodynamic simulations http://purl.org/coar/resource_type/c_6501