The Danish particle nå has many different functions. Among these is the free-standing nå (oh), i.e. a nå that constitutes a turn and has rising intonation.

Nå functions both as a) answer receipt and b) information receipt.

a) When a speaker poses a question, and receives an answer, the speaker can use nå as a receipt of the answer. This receipt is also a continuer; the interactional turn will transition to the other speaker.

b) When a person receives previously unknown information that might be surprising or unexpected, that person can utter nå  as a receipt of information or news. 

An example of nå with rising intonation is: