@article{Bowen:2022:10.1103/physrevlett.129.165101,
author = {Bowen, TA and Chandran, BDG and Squire, J and Bale, SD and Duan, D and Klein, KG and Larson, D and Mallet, A and McManus, MD and Meyrand, R and Verniero, JL and Woodham, LD},
doi = {10.1103/physrevlett.129.165101},
journal = {Physical Review Letters},
pages = {1--8},
title = {In situ signature of cyclotron resonant heating in the solar wind},
url = {http://dx.doi.org/10.1103/physrevlett.129.165101},
volume = {129},
year = {2022}
}

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TY  - JOUR
AB  - The dissipation of magnetized turbulence is an important paradigm for describing heating and energy transfer in astrophysical environments such as the solar corona and wind; however, the specific collisionless processes behind dissipation and heating remain relatively unconstrained by measurements. Remote sensing observations have suggested the presence of strong temperature anisotropy in the solar corona consistent with cyclotron resonant heating. In the solar wind, in situ magnetic field measurements reveal the presence of cyclotron waves, while measured ion velocity distribution functions have hinted at the active presence of cyclotron resonance. Here, we present Parker Solar Probe observations that connect the presence of ion-cyclotron waves directly to signatures of resonant damping in observed proton-velocity distributions using the framework of quasilinear theory. We show that the quasilinear evolution of the observed distribution functions should absorb the observed cyclotron wave population with a heating rate of 10−14  W/m3, indicating significant heating of the solar wind.
AU  - Bowen,TA
AU  - Chandran,BDG
AU  - Squire,J
AU  - Bale,SD
AU  - Duan,D
AU  - Klein,KG
AU  - Larson,D
AU  - Mallet,A
AU  - McManus,MD
AU  - Meyrand,R
AU  - Verniero,JL
AU  - Woodham,LD
DO  - 10.1103/physrevlett.129.165101
EP  - 8
PY  - 2022///
SN  - 0031-9007
SP  - 1
TI  - In situ signature of cyclotron resonant heating in the solar wind
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/physrevlett.129.165101
UR  - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.129.165101
UR  - http://hdl.handle.net/10044/1/101625
VL  - 129
ER  - 

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