The HAges Catalog: Stellar Ages for High Priority HWO Target Stars
Austin T. Ware, Katelyn Ruppert, Patrick A. Young

TL;DR
This paper presents a catalog of stellar ages for high-priority HWO target stars, emphasizing the current scarcity of precise age measurements and the need for further efforts to improve age constraints before the Habitable Worlds Observatory mission.
Contribution
It compiles published stellar ages using high-precision methods for 659 HWO target stars, highlighting the limited number with precise age estimates and the necessity for ongoing data collection.
Findings
Only 5% of stars have asteroseismic ages.
Approximately 20% have gyrochronal ages.
Median uncertainties are around 9-16%, with systematic uncertainties slightly larger.
Abstract
Precise stellar ages (uncertainties Gyr, or at solar age) are required to discern evolutionary trends in atmospheric biosignatures of terrestrial habitable zone exoplanets surveyed by the Habitable Worlds Observatory (HWO) and will aid in constraining planetary interior evolution and target prioritization. We present a catalog of stellar ages for Tier 1 and Tier 2 targets in the HWO Target Stars and Systems (TSS) sub-working group's TSS25 list, compiling published literature ages derived from high-precision methods. The sample comprises 659 stars likely to be observed by HWO, independent of the final mission architecture. This initial catalog focuses on asteroseismology and gyrochronology, which can achieve precision for the majority of these stars. We find that only of the sample have asteroseismic ages and have gyrochronal…
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