I think this is value betting as villain has T9 and believes he is ahead on the turn.

I played a similar hand at these stakes today where villain donked into me on the flop with OESD and then hit top pair on the turn -- his line was exactly like this, except he donked the flop, I popped him, he snap called it and donked the turn and river. I called him down with an overpair (board was paired, flush and straightening by turn).