Hints of a close outer companion to the ultra-hot Jupiter TOI-2109 b - Harre, J. V.; Smith, A. M.S.; Barros, S.C.C.; Singh, V.; Korth, Judith; Brandeker, A.; Collier Cameron, A.; Lendl, M.; Wilson, T.G.; Borsato, L.; Csizmadia, Szilard; Cabrera, J.; et al. (Astronomy and Astrophysics A close outer companion to TOI-2109 b? : J/A+A/692/A254, 2024)