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Absolute calibration of RR Lyrae Period-Luminosity-Metallicity relations in globular clusters with Gaia EDR3
Image Credit: Anupam Bhardwaj
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Absolute calibration of RR Lyrae Period-Luminosity-Metallicity relations in globular clusters with Gaia EDR3
New calibrated RR Lyrae Ks-band Period-Luminosity relations (PLRs) in globular clusters with different mean-metallicities.
The distances to the globular clusters were determined using Gaia EDR3 based zero-point calibration for RR Lyrae stars. The residuals of the Period-Luminosity-metallicity (PLZ) relations do not show any trend with metallicity seen in the PLRs in the top panel.