This is the best image I have of a true sun dog. I don't think conditions were right for halos to form except where the arc is visible, because none of the usual other features is present. But most people call these things sun dogs too, and around here they are fairly common. Sun dogs over west Fairbanks, taken from the West Ridge area of UAF at around noon, a few days after Winter solstice. Here is a sun dog formed in a bank of ice fog.
Ice fog is a fog that forms as ice crystals instead of water droplets.
In Fairbanks it often forms when there is a temperature inversion holding polluted air in place and temperatures are below zero, Fahrenheit. Car exhausts then supply a lot of the water vapor for ice fog. The steam plumes are from houses and the Alaska Range is in the distance. I'd like to get some pictures of the range, but I don't have enough camera. This is as high as the Sun gets in late January in Fairbanks.