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)