  We systematically investigate the electromagnetic form factors of heavy-light
pseudo-scalar and vector mesons within the Dyson-Schwinger/Bethe-Salpeter
equations framework for the first time. It is found that the charge radius of
vector meson is larger than that of its pseudo-scalar counterpart. In
heavy-light systems, the flavor symmetry breaking will lead to a splitting of
the form factor of different quark, and the distribution range of lighter and
heavier quark gradually expands and contracts, respectively. The competition
between them together generates the electromagnetic form factors of meson. Our
results can be compared with other theoretical calculations and future
experimental data.
