activity
19942026
most citedThe Apache Point Observatory Galactic Evolution Experiment (APOGEE)

1.8k citations · 27k across the 254 of their papers we have counts for

collaborators

254 papers

astro-ph.SR2026

Evidence for Enhanced Helium Enrichment from Asteroseismology

Miqaela K. Weller, Marc H. Pinsonneault, Jennifer A. Johnson +1

The helium abundance of a star has a dramatic effect on luminosity, internal structure, and evolutionary timescales, yet direct helium measurements are unavailable for most stars.…

astro-ph.SR2026

Modeling Rotation in the Old, Cold Domain: Implications on Gyrochronology and the Stellar Magnetic Wind

Amanda L. Ash, Yuxi, Lu +1

Gyrochronology ties stellar rotation periods to ages. It is well studied in the young, open cluster age domain, but there are few constraints on gyrochronology in the old field sta…

astro-ph.SR2026

They Won't Be Giants: Missing Metal-Rich RGB Stars in Gaia Data Indicate Truncated Stellar Evolution

Yuxi Lu, Madeline Howell, Marc H. Pinsonneault +3

We investigate the population of luminous red giant branch stars as a function of metallicity using Gaia XP metallicity combined with SDSS-V, GALAH, and LAMOST. After applying unif…

astro-ph.SR2026

Detecting Solar-Like Oscillations in the Highest Mass TESS Giants

Noah J. Downing, Madeline Howell, Marc H. Pinsonneault +4

Red-giant asteroseismology yields precise stellar parameters, making it a powerful tool for studying stellar structure and evolution, as demonstrated by the Kepler mission. However…

astro-ph.GA2026

The Twentieth Data Release of the Sloan Digital Sky Survey: First All-Sky BOSS Spectra, eROSITA-SDSS-V Mapper Coordinated Observations, and a Preview of the Local Volume Mapper

SDSS Collaboration, Mojgan Aghakhanloo, David Aguilar +273

This paper presents the twentieth data release (DR20) from the Sloan Digital Sky Survey, the third data release of its fifth generation (SDSS-V). SDSS-V is a panoptic spectroscopy…

astro-ph.SR2026

Ensemble Kinematic Ages for 1.5 Million LAMOST Stars

Yuxi Lu, Marc H. Pinsonneault

We present a framework for inferring stellar ages from spectroscopic stellar parameters, calibrated with ensemble kinematics by averaging over the median vertical action, , fo…