Autoregressive Moving Average Modelling of TESS Photometry of Massive Stars
Year: 2025
Type: article
Abstract: Standard statistical time series analysis methods developed for observations regularly spaced in time are applied to measurements of 30 massive stars. Two TESS orbits of observations of each of the stars are analysed using this time domain methodology. It is found that the majority of light curves do not exhibit quasi-periodicities, i.e. the variability is fully aperiodic. The effective temperature and gravity can be used to predict with good accuracy the presence/absence of quasi-periodicities. Frequencies have a quadratic dependence on the effective temperature. The calculation of characteristic frequencies is also discussed. It is shown that the use of inappropriate spectral forms for this purpose may lead to biased results.
Author: C Koen
Institution: University of the Western Cape
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,046
OpenAlex ID: W4408317721