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On the Complex Light Variations of α1 Herculis: One of the Nearest AGB Red Giants

  • Authors: Jacob Tyler, Edward Guinan

Jacob Tyler and Edward Guinan 2026 Research Notes of the AAS 10 .

  • Provider: AAS Journals

Caption: Figure 1.

(a) The last 80+ yr of AAVSO visual observations (10 day bins); (b) V-band observations from 2013.5-present showing short-term 60–140 day (peak ∼123 day) and ∼390–400 day light variations as well as a ∼9–10 yr cycle agreeing with the visual data; (c) WWZ analysis of the visual data showing evolving periodicities of 1360–1630 and 3500–4000 day (∼9–10 yr); (d) WWZ analysis of the V-band observations returning a dominant period of ∼123 day as well as weaker transient periodicities of ∼200 and 390–490 day.

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