A simple issue about ros sdk of azure kinect dk 

Apologize in advance for asking such an irrelevant and stupid question.
i'm using the ros sdk of azure kinect dk camera ,which microsoft provided.
i'm confused whether its depth img and rgb img have been aligned,which gotten from ros topic"depth_to_rgb/image_raw"&"rgb/image_raw"
The people around me didn't have a deep understanding of this, and I only asked for help online