Journal ArticleQuasi-periodic Dimming of the ∼130 Myr-old Debris-Disk Hosting Star HD 240779 is not PersistentGaidos, EricAbstract Quasi-periodic (1.5 days) dimming (by circumstellar dust) of the 135 Myr-old AB Doradus moving group member HD 240779 was detected in photometry by TESS in late 2018. Similar observations two years later show no such signal, and ground-based photometry indicate that the signal was absent in late 2019. This suggests that the source of the dust did not survive long after 2018, e.g., it was a disrupted planetesimal, or that dust production by the body is episodic, analogous to the “evaporating” planets detected by Kepler.2022-03-1010337669Research Notes of the AAS63492515-5172https://doi.org/10.3847/2515-5172/ac5b7c2106927National Science Foundation