  Debris disks are usually thought to be gas-poor, the gas being dissipated by
accretion or evaporation during the protoplanetary phase. HD141569A is a 5 Myr
old star harboring a famous debris disk, with multiple rings and spiral
features. We present here the first PdBI maps of the 12CO(2-1), 13CO(2-1) gas
and dust emission at 1.3 mm in this disk. The analysis reveals there is still a
large amount of (primordial) gas extending out to 250 au, i. e. inside the
rings observed in scattered light. HD141569A is thus a hybrid disk with a huge
debris component, where dust has evolved and is produced by collisions, with a
large remnant reservoir of gas.

Solar and Stellar Astrophysics