  The nucleon-deuteron radiative capture process is investigated using the
chiral nuclear potentials and the electromagnetic currents developed by the
Bochum-Bonn group. While the strong interaction is taken up to the
next-to-next-to-leading order, the electromagnetic current consists of a single
nucleon current, the leading one-pion exchange one and is supplemented by
contributions from the long-range two-pion exchange current at
next-to-leading-order. The theoretical predictions for the cross sections as
well as analyzing powers show strong dependence on the values of regularization
parameters. Only small effects of the three-nucleon force and the long-range
two-pion exchange current are observed. The dependence on the choice of
regularization parameters results in a big theoretical uncertainty and clearly
points to the necessity to include corrections from higher orders of the chiral
expansion both for the nuclear forces and currents.
