Application of Monte Carlo-based statistical significance determinations to the Beta Cephei stars V400 Car, V401 Car, V403 Car and V405 Car

TL;DR

This study applies Monte Carlo-based statistical significance tests to identify new pulsation frequencies in four Beta Cephei stars, enhancing the detection reliability of stellar periodicities.

Contribution

It introduces a Monte Carlo significance testing approach for analyzing stellar pulsations, revealing six new periodicities in Beta Cephei stars.

Findings

Six new periodicities detected in the stars

One frequency significant above 4-sigma

Provides statistical significance for all periodicities

Abstract

We have used Lomb-Scargle periodogram analysis and Monte Carlo significance tests to detect periodicities above the 3-sigma level in the Beta Cephei stars V400 Car, V401 Car, V403 Car and V405 Car. These methods produce six previously unreported periodicities in the expected frequency range of excited pulsations: one in V400 Car, three in V401 Car, one in V403 Car and one in V405 Car. One of these six frequencies is significant above the 4-sigma level. We provide statistical significances for all of the periodicities found in these four stars.