P. Kołaczek-Szymański

Eppur binaria non \`e esclusa: Pulsations in CZ Tuc appear to be tidally excited by its veiled companion

Long secondary periods (LSPs), observed in about one-third of pulsating red giants, remain unexplained despite decades of study, with binarity and non-radial oscillations as the leading competing hypotheses. If LSP variables are indeed interacting, eccentric binary systems consisting of a red giant and a substellar obj...