4 papers
Constraining intrinsic S-type AGB masses and third dredge-up using pulsation
Y. L. Mori, A. I. Karakas, S. W. Campbell
The lowest mass at which the third dredge-up (TDU) occurs for thermally-pulsing asymptotic giant branch (TP-AGB) stars remains a key uncertainty in detailed stellar models. S-type…
Rare Find: Discovery and chemo-dynamical properties of two s-process enhanced RR Lyrae stars
Valentina D'Orazi, Giuliano Iorio, Borbála Cseh +15
We report the serendipitous discovery of two RR Lyrae stars exhibiting significant s-process element enrichment, a rare class previously represented solely by TY Gruis. Our goal is…
Asteroseismology of Carbon-Deficient Red Giants: Merger Products of Hierarchical Triple Systems?
Sunayana Maben, Simon W. Campbell, Timothy R. Bedding +4
Carbon-deficient giants (CDGs) are a rare and chemically peculiar class of stars whose origins remain under active investigation. We present an asteroseismic analysis of the entire…
Asteroseismic Masses of Red Giants in the Galactic Globular Clusters M9 & M19
Madeline Howell, Simon W. Campbell, Csilla Kalup +2
Asteroseismic masses of globular cluster (GC) stars are invaluable to investigate stellar evolution. Previously, only two GCs have been seismically studied. We present new detectio…