Codimension-two objects on a system of brane-antibrane are studied in the
context of Born-Infeld type effective field theory with a complex tachyon and
U(1)×U(1) gauge fields. When the radial electric field is turned on in
D2Dˉ2, we find static regular global and local D-vortex solutions
which could be candidates of straight cosmic D-strings in a superstring theory.
A natural extension to DF-strings is briefly discussed.Comment: 24 pages, 10 eps figure