Stars on the Verge: From Days to Decades, Studying the Photometric Variations of the Red Supergiant W Persei
Abstract
W Persei is a massive, luminous and large red supergiant located relatively nearby. W Persei is a probable SN-II progenitor. We analyzed ~120 yr of photometry from the AAVSO database. The analysis was conducted in the period analysis software Peranso where the CLEANest power spectrum and WWZ-wavelet programs were utilized. Two dominant periods of P = 532 ± 68 days and P = 2922 ± 140 days are found. Intermediate and transitory periods are also uncovered along with period events such as a significant increase in the long-period, period-merging and period-splitting. Using Transiting Exoplanet Survey Satellite observations, stochastic ~0.3-0.8 mmag light variability on timescales of ~0.3 day appears present. The physical causes of these variations is discussed.
- Publication:
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Research Notes of the American Astronomical Society
- Pub Date:
- October 2022
- DOI:
- Bibcode:
- 2022RNAAS...6..204L
- Keywords:
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- Red supergiant stars;
- 1375