Sun, 02/12/2023 - 18:13
Not sure if this is the right forum for this note, but in the past week a paper on the astro-ph preprint server describes new work on variations in the periods of Miras, including 'bump' Miras and other phenomema. The paper makes use of the long-term visual databases as well as recent surveys.
https://arxiv.org/abs/2302.02206
Meandering periods and asymmetries in light curves of Miras: Observational evidence for low mass-loss rates
\Brian
That was a very intresting article. Thanks for bringing it to attention, I think I had missed it otherwise.