The Temperature Anisotropy and Helium Abundance Features of Alfvénic Slow Solar Wind Observed by Parker Solar Probe, Helios, and Wind Missions - Huang, J; Larson, DE; Ervin, T; Liu, M; Ortiz, O; Martinovic, MM; Huang, Z; Chasapis, A; Chu, X; Alterman, BL; Huang, Z; Wei, W; et al. (ASTROPHYSICAL JOURNAL LETTERS, 2025)