Asymptotic Giant Branch Variables in NGC 6822
Francois Nsengiyumva, Patricia W. Whitelock, Michael W. Feast, John, W. Menzies
TL;DR
This study identifies numerous AGB variable stars in NGC 6822 using infrared photometry and employs 30 large amplitude variables to refine the period-luminosity relation, enhancing understanding of stellar evolution in this galaxy.
Contribution
Introduces a new calibration of the period-luminosity relation for AGB variables in NGC 6822 based on multi-epoch infrared observations.
Findings
Identified large numbers of AGB variables in NGC 6822.
Provided a new calibration of the period-luminosity relation.
Analyzed variables with periods from 200 to 900 days.
Abstract
Using multi-epoch JHK photometry obtained with the 1.4-m Japanese-South African Infrared Survey Facility at Sutherland we have identified large numbers of AGB variables in NGC 6822. This paper uses 30 large amplitude variables, with periods ranging from about 200 to 900 days, to provide a new calibration of the period-luminosity relation.
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Geophysics and Gravity Measurements