  In this study, we consider chromospheric heating models for 55 Cancri in
conjunction with observations. The theoretical models, previously discussed in
Paper I, are self-consistent, nonlinear and time-dependent ab-initio
computations encompassing the generation, propagation, and dissipation of
waves. Our focus is the consideration of both acoustic waves and longitudinal
flux tube waves amounting to two-component chromosphere models. 55 Cancri, a
K-type orange dwarf, is a star of low activity, as expected by its age, which
also implies a relatively small magnetic filling factor. The Ca II K fluxes are
computed (multi-ray treatment) assuming partial redistribution and
time-dependent ionization. The theoretical Ca II H+K fluxes are subsequently
compared with observations. It is found that for stages of lowest chromospheric
activity the observed Ca II fluxes are akin, though not identical, to those
obtained by acoustic heating, but agreement can be obtained if low levels of
magnetic heating - consistent with the assumed photospheric magnetic filling
factor - are considered as an additional component; this idea is in alignment
with previous proposals conveyed in the literature.
