13 citations · 18 across the 3 of their papers we have counts for
3 papers
astro-ph.SR2025
Long Secondary Periods in Red Giants: AAVSO Observations and the Eclipse Hypothesis
John Percy, Melanie Szpigiel
At least a third of red giants show a long secondary period (LSP), 5 to 10 times longer than the pulsation period. There is strong evidence that the LSP is caused by eclipses of th…
astro-ph.SR2023★ 5 cited
The Long Secondary Period (LSP) Variables: Overview and Some Analysis
John R. Percy, Mayank H. Shenoy
We briefly review the phenomenon of long secondary periods (LSPs) in red giants, and the LSP variable stars classification introduced in the All-Sky Automated Survey for Supernovae…
astro-ph.SR2011★ 13 cited
The H-alpha Variations of the Luminous Blue Variable P Cygni: Discrete Absorption Components and the Short S Doradus Phase
Noel D. Richardson, Nancy D. Morrison, Douglas R. Gies +3
P Cygni is a prototype of the Luminous Blue Variables (or S Doradus variables), and the star displays photometric and emission line variability on a timescale of years (known as th…