Abstract:
We model the dynamical interaction between magnetic flux
tubes and granules in the solar photosphere which leads to the excitation of
transverse (kink) and longitudinal (sausage) tube waves. The investigation
is motivated by the interpretation of network oscillations in terms of flux
tube waves. The calculations show that for magnetic field strengths typical
of the network, the energy flux in transverse waves is higher than in
longitudinal waves by an order of magnitude. But for weaker fields, such
as those that might be found in internetwork regions, the energy fluxes in
the two modes are comparable. Using observations of footpoint motions,
the energy flux in transverse waves is calculated and the implications for
chromospheric heating are pointed out.
