p-mode-dominated subdwarf B pulsators in binaries

These are only the second and third sdB pulsators with detected frequency multiplets in both the p- and g (gravity)-mode regions. This allows an examination of the radial rotation profiles and p- and g-mode overtone spacings.

Frequency multiplets indicate that PG 1315-123 rotates uniformly, as a solid body, while PG 0048+091 is rotating faster in the outer envelope. g- and p-mode overtone spacings for PG 1315-123 agree with previous findings and model predictions at 237 and ~1000s while those for PG 0048+091 are significantly shorter at 207 and <250s, respectively. The cause of PG 0048+091's discrepancies is likely related to core structural differences which could be related to progenitor mass.