check raise.
few points.
I dont mind a limp in ep with AJ. Im not so keen calling a raise (not applicable here i know)
If you bet into this pot and get raised its a little difficult.
1. UTG you may be put on a pp so top pair may auto reraise.
2. You probably get minraised by a better hand so you need to buy info oop.
Id check raise this flop or just call and make a play on the turn when opp has to define his hand. Its a great flop for AJ so buy a bit of info. Betting into the pot from there asks for an aggro player or better hand to take money off you or push you off the hand totally.
position is key here if you want to play AJ in that position.