NOAO >   Observing Info >   Approved Programs >   2020B-0242

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Program Information for 2020B-0242


PI: Mackenna Wood, U. of North Carolina, woodml96@live.unc.edu
Address: Dept. of Physics and Astronomy, Chapel Hill, NC 27599

CoI: Andrew Mann, Univeristy of North Carolina at Chapel Hill
CoI: Aaron C Rizzuto, U. of Texas, Austin

Title: A Lithium Depletion Age for the 125 Myr Psc-Eri Association

Abstract: Cluster ages are critical for benchmarking models of stellar evolution and understanding planet formation and evolution. In the age of Gaia, we are discovering new stellar associations and thousands of new members of existing groups. With accurate ages new groups will provide unmatched samples of nearby stars in a well-defined evolutionary sequence. One of the newly identified groups, the Pisces-Eridanus stream is particularly powerful; Curtis et al. 2019 show that the stream has an age of 100-150,Myr, making it a more massive and diffuse analog to the Pleiades. Already, TESS has identified several transiting planets around group members. However, the isochronal and rotation- based age is imprecise, and the power of such associations is to test such isochrone-based ages and gyrochronology relations. Here we propose for optical spectra to identify Lithium Depletion Boundary of Pisces- Eridanus members, yielding a more precise and accurate age for the group. The results will be critical to utilize the full potential of this newly identified association.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2020B):  SOAR/Goodman -- 3n on Oct 24 - Oct 26 2020


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NOAO >   Observing Info >   Approved Programs >   2020B-0242

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