Generation of solar chromosphere heating and coronal outflows by two-fluid waves by M. Pelekhata et al. on Thursday 24 November

Context. It is known that Alfv\'en and magnetoacoustic waves both contribute

to the heating of the solar chromosphere and drive plasma outflows. In both

cases, the thermalization of the wave energy occurs due to ion-neutral

collisions, but the obtained rates of plasma heating cannot explain the

observational data. The same is true for the magnitudes of the outflows.

Aims. The aim of the present paper is to reexamine two-fluid modeling of

Alfv\'en and magnetoacoustic waves in the partially ionized solar chromosphere.

We attempt to detect variations in the ion temperature, and vertical plasma

flows for different wave combinations.

Methods. We performed numerical simulations of the generation and evolution

of coupled Alfv\'en and magnetoacoustic waves using the JOANNA code, which

solves the two-fluid equations for ions (protons)+electrons and neutrals

(hydrogen atoms), coupled by collision terms.

Results. We confirm that the damping of impulsively generated small-amplitude

waves negligibly affects the chromosphere temperature and generates only slow

plasma flows. In contrast, waves generated by large-amplitude pulses

significantly increase the chromospheric temperature and result in faster

plasma outflows. The maximum heating occurs when the pulse is launched from the

center of the photosphere, and the magnitude of the related plasma flows

increases with the amplitude of the pulse. Conclusions. Large-amplitude coupled

two-fluid Alfv\'en and magnetoacoustic waves can significantly contribute to

the heating of the solar chromosphere and to the generation of plasma outflows.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.12898v1