Result
http://twodimes.net/h/?z=724017
pokenum -h ah ad - js 9s -- 8s ts 2c
Holdem Hi: 990 enumerated boards containing Ts 8s 2c
cards win %win lose %lose tie %tie EV
Ad Ah 433 43.74 557 56.26 0 0.00 0.437
Js 9s 557 56.26 433 43.74 0 0.00 0.563
I would bet 1/2 to 3/4 pot on the flop and hope to get raised. Even if he has the As, you're not too bad off.
As Ad 469 47.37 521 52.63 0 0.00 0.474
Js 9s 521 52.63 469 47.37 0 0.00 0.526
Worst case, he has a pair and better flush draw.
Result
http://twodimes.net/h/?z=724023
pokenum -h as 2s - js 9s -- 8s ts 2c
Holdem Hi: 990 enumerated boards containing Ts 8s 2c
cards win %win lose %lose tie %tie EV
As 2s 555 56.06 435 43.94 0 0.00 0.561
Js 9s 435 43.94 555 56.06 0 0.00 0.439