Eyras, Eduarde2026-01-012026-01-011029-8479ORCID:/0000-0003-0793-6218/work/162948969https://hdl.handle.net/1885/733800204We consider non-BPS D8 (and D7) branes in type 0 open string theory and describe under which circumstances these branes are stable. We find stable non-BPS D7 and D8 in type 0 with and without D9-branes in the background. By extending the descent relations between D-branes to type 0 theories, the non-BPS D8-brane is considered as the result of a tachyon condensation of a D9 anti-D9 pair in type 0. We study the condensation of the open string tachyons in type 0 with generic gauge groups giving rise to different configurations involving non-BPS D8-branes and discuss the stability in each case. The results agree with the topological analysis of the vacuum manifold of the tachyon potential for each case.enBrane Dynamics in Gauge TheoriesD-branesSolitons Monopoles and Instantons199910.1088/1126-6708/1999/10/00533646025822