Parker Solar Probe Evidence for the Absence of Whistlers Close to the Sun to Scatter Strahl and to Regulate Heat Flux - Cattell,C; Breneman,A; Dombeck,J; Hanson,E; Johnson,M; Halekas,J; Bale,SD; de,Wit TD; Goetz,K; Goodrich,K; Malaspina,D; Pulupa,M; et al. (ASTROPHYSICAL JOURNAL LETTERS, 2022)