Revising the ages of planet-hosting stars
Andrea Bonfanti, Sergio Ortolani, Giampaolo Piotto, Valerio Nascimbeni

TL;DR
This study measures the ages of planet-hosting stars using stellar models and compares two age determination methods, revealing a broader age distribution with some stars younger than previously thought.
Contribution
Introduces and applies two algorithms for stellar age estimation, highlighting limitations and providing revised age distributions for planet-hosting stars.
Findings
Approximately 6% of stars are younger than 0.5 Gyr.
The age distribution peaks between 1.5 and 2 Gyr.
About 7% of stars are older than 11 Gyr.
Abstract
This article aims to measure the age of planet-hosting stars (SWP) through stellar tracks and isochrones computed with the \textsl{PA}dova \& T\textsl{R}ieste \textsl{S}tellar \textsl{E}volutionary \textsl{C}ode (PARSEC). We developed algorithms based on two different techniques for determining the ages of field stars: \emph{isochrone placement} and \emph{Bayesian estimation}. Their application to a synthetic sample of coeval stars shows the intrinsic limits of each method. For instance, the Bayesian computation of the modal age tends to select the extreme age values in the isochrones grid. Therefore, we used the isochrone placement technique to measure the ages of 317 SWP. We found that of SWP have ages lower than 0.5 Gyr. The age distribution peaks in the interval [1.5, 2) Gyr, then it decreases. However, of the stars are older than 11 Gyr. The Sun turns out to be…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
