The mook has a point: Many British dialects would pronounce it as "aa" rather than "ah." The Brits and the Yanks are almost completely opposite in their pronunciation when it comes to the sounds of the short A. In American English, a short A is usually pronounced "aa," and only sometimes "ah." (This is not to be mistaken with "aw," as in "awful" or "cough.") In British English, those same pronunciations are usually exactly reversed. They pronounce "pasta" the way we would pronounce the sound a sheep makes--"paa-a-a-ta"--and the sounds that we would say as "aa" come out for them as "ah," like calling a cat a cot.
All of which is to say that Dalton might actually be pronounced differently if you're in Britain. If you watch the new BSG, Baltar (the Brit) pronounces his own name with an "aa" but everyone else (the Yanks) pronounces it with an "ah."
