TESS detections of pulsations in Of?p stars in the Magellanic Clouds

TL;DR

This study utilized TESS data to detect pulsations in six Of?p stars in the Magellanic Clouds, identifying variability in three stars, which provides insights for stellar evolution modeling.

Contribution

First detection of pulsations in Magellanic Cloud Of?p stars using TESS, linking magnetic fields and pulsational behavior to stellar evolution.

Findings

Pulsational variability found in three Of?p stars.

Two stars with magnetic fields also show pulsations.

Results help refine stellar evolution models.

Abstract

We used TESS observations to search for pulsations in six known Of?p stars in the Magellanic Clouds. We find evidence for pulsational variability in three Of?p stars: UCAC4 115-008604, OGLE SMC-SC6 237339, and AzV 220. Two of them, UCAC4 115-008604 and OGLE SMC-SC6 237339, have been reported to possess kG-order magnetic fields. The obtained results are important to constrain and improve stellar evolution models.