Photometric and spectroscopic variability of 53 Per

TL;DR

This study combines photometric and spectroscopic data to identify new and known variability frequencies in the SPB star 53 Per, enhancing understanding of its pulsation behavior.

Contribution

It provides the first combined photometric and spectroscopic frequency analysis of 53 Per, discovering five new frequencies and confirming four known ones.

Findings

Eight independent frequencies identified from photometry.

Four independent frequencies confirmed from spectroscopy.

Five new frequencies discovered in 53 Per.

Abstract

A new investigation of the variability of the SPB-type star 53 Per is presented. The analysis of the BRITE photometry allowed us to determine eight independent frequencies and the combination one. Five of these frequencies and the combination one were not known before. In addition, we gathered more than 1800 new moderate and high-resolution spectra of 53 Per spread over approximately six months. Their frequency analysis revealed four independent frequencies and the combination one, all consistent with the BRITE results.