The Long-term Photometric Behavior of 39 Semiregular Variable Stars

Photometric measurements of the light and color variations of 39 semiregular variable stars over a 30 yr time interval have been used to explore the systematics of these variations. These results show the complex nature of the frequency compositions of the light curves of these stars. The frequencie...

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Bibliographic Details
Published in:The Astronomical journal Vol. 167; no. 5; pp. 200 - 215
Main Author: Cadmus, Robert R.
Format: Journal Article
Language:English
Published: Madison The American Astronomical Society 01.05.2024
IOP Publishing
Subjects:
Light curve
Long period variable stars
Multi-periodic pulsation
Photometry
Pulsation modes
Semi-regular variable stars
Semiregular variable stars
Shape effects
Stars
Stellar pulsations
Systematics
ISSN:0004-6256, 1538-3881
Online Access:Get full text
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Summary:Photometric measurements of the light and color variations of 39 semiregular variable stars over a 30 yr time interval have been used to explore the systematics of these variations. These results show the complex nature of the frequency compositions of the light curves of these stars. The frequencies present in the light curves tend to be harmonic in nature, suggesting that both modes of pulsation and shape effects may be involved and the nature of the variations indicates that stochastic excitation is involved.
Bibliography:AAS49605
Stars and Stellar Physics
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ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/ad303a