Power density spectra morphologies of seismically unresolved red-giant asteroseismic binaries Jeong Yun Choi, Francisca Espinoza-Rojas, Quentin Coppée and Saskia Hekker A&A, 699 (2025) A180 Published online: 07 July 2025 DOI: 10.1051/0004-6361/202555279