3 citations · 6 across the 7 of their papers we have counts for
7 papers
ASAS-SN Observations of the Pulsation of some R Coronae Borealis (RCB) Stars
John R. Percy
Photometry from the All-Sky Automated Survey for Supernovae (ASAS-SN), along with the AAVSO VSTAR time-series analysis package has been used to study the pulsational properties of…
Studies of the Long Secondary Periods in Pulsating Red Giants. II. Lower-Luminosity Stars
John R. Percy, Henry Leung
We have used AAVSO visual and photoelectric V data, and the AAVSO time-series package VSTAR and the Lomb-Scargle time-series algorithm to determine improved pulsation periods, "lon…
Period Changes and Evolution in Pulsating Variable Stars
Hilding R. Neilson, John R. Percy, Horace A. Smith
We review ways in which observations of the changing periods of pulsating variable stars can be used to detect and directly measure their evolution. We briefly describe the two mai…
Studies of the Long Secondary Periods in Pulsating Red Giants
John R. Percy, Emily Deibert
We have used systematic, sustained visual observations from the AAVSO International Database, and the AAVSO time-series analysis package VSTAR to study the unexplained "long second…
A Study of Multiple-Mode Pulsating Red Giants
John R. Percy, Tanya Brekelmans
This project began as a search for triple-mode pulsating red giants (PRGs) among known double-mode PRGs,, using AAVSO visual data. It then expanded to include a check on the realit…
Does the Period of a Pulsating Star Depend on its Amplitude?
John R. Percy, Jeong Yeon, Yook
Several classes of pulsating stars are now known to undergo slow changes in amplitude; these include pulsating red giants and supergiants, and yellow supergiants. We have used visu…