The Digital Press

This study presents the first detailed seismic modeling of SX Phoenicis variable stars in the omega Centauri cluster, using updated stellar parameters and pulsation data. By analyzing double-mode radial pulsators, the researchers constrain their physical properties and test different opacity tables and helium abundances.

Why it matters: Precise seismic modeling improves understanding of these stars’ masses, ages, and chemical compositions in omega Centauri.

The big picture: Results link SX Phe stars’ ages and metallicities to established cluster properties, refining insights into stellar evolution.

Stunning stat: Derived masses range from 1.0 to 1.2 solar masses, with ages between 1.9 and 3.8 billion years.

The other side: Some opacity models predict metallicities inconsistent with omega Centauri’s known values, challenging their applicability.