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Title: Zwicky Transient Facility and Globular Clusters: Calibration of the gr-band Absolute Magnitudes for the Yellow Post-asymptotic-giant-branch Stars

We present the first absolute calibration for the yellow post-asymptotic-giant-branch (PAGB) stars in thegandrband based on time-series observations from the Zwicky Transient Facility. These absolute magnitudes were calibrated using four yellow PAGB stars (one nonvarying star and three Type II Cepheids) located in the globular clusters. We provide two calibrations of thegr-band absolute magnitudes for the yellow PAGB stars, by using an arithmetic mean and a linear regression. We demonstrate that the linear regression provides a better fit to theg-band absolute magnitudes for the yellow PAGB stars. These calibratedgr-band absolute magnitudes have a potential to be used as Population II distance indicators in the era of time-domain synoptic sky surveys.

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DOI PREFIX: 10.3847
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Journal Name:
The Astronomical Journal
Medium: X Size: Article No. 166
["Article No. 166"]
Sponsoring Org:
National Science Foundation
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