Parker Solar Probe Evidence for the Absence of Whistlers Close to the Sun to Scatter Strahl and to Regulate Heat Flux

C. Cattell, A. Breneman, J. Dombeck, E. Hanson, M. Johnson, J. Halekas, S. D. Bale, T. Dudok De Wit, K. Goetz, K. Goodrich, D. Malaspina, M. Pulupa, T. Case, J. C. Kasper, D. Larson, M. Stevens, C. Cattell, P. Whittlesey