Research Interests


My main research activity is connected with understanding the nature of magnetic waves in the Sun's atmosphere. I pioneered the theory of waves in thin flux tubes, deriving the so-called thin tube equations; demonstrated the occurrence of a soliton (a nonlinear wave) in a flux tube, deriving a nonlinear integro-differential equation (the Leibovich-Roberts equation) which now bears my name; established the existence of two surface waves on a magnetic interface; established a theory of oscillations in solar coronal loops (recently confirmed by space observations) which led to the new subject of coronal seismology; provided a new theory of how rapid pulsations occur in the coronal loops; pioneered the theory of how the magnetic chromosphere causes the Sun's global oscillations (p-modes) to vary over the solar cycle.

EXTENDED VISITS ABROAD (funded by host):