John R Percy

John R. Percy is Professor Emeritus in Astronomy & Astrophysics at the University of Toronto. He is internationally recognized for his work on variable stars and stellar evolution, and has also been a leader in science education and outreach.

Pulsating Red Giants in a Globular Cluster: omega Centauri
Pulsating Red Giants in a Globular Cluster: omega Centauri

We analyzed light curves of 16 PRGs in omega Centauri, confirming the prevalence of LSPs and establishing period–luminosity sequences consistent with Population II red giants elsewhere.

Dec 1, 2022