  We present spatially- and spectrally-resolved photoluminescence measurements
of indirect excitons in high magnetic fields. Long indirect exciton lifetimes
give the opportunity to measure magnetoexciton transport by optical imaging.
Indirect excitons formed from electrons and holes at zeroth Landau levels (0e -
0h indirect magnetoexcitons) travel over large distances and form a ring
emission pattern around the excitation spot. In contrast, the spatial profiles
of 1e - 1h and 2e - 2h indirect magnetoexciton emission closely follow the
laser excitation profile. The 0e - 0h indirect magnetoexciton transport
distance reduces with increasing magnetic field. These effects are explained in
terms of magnetoexciton energy relaxation and effective mass enhancement.
