Q:

Survival on a rogue planet

Are there any planets not orbiting a celestial body which can support life despite the temperature?  Also what is the absolute minimum temperature that life can survive in? 

A:

IHMO, I think it is possible into any planet with a hot core, that means if there is life on some of this planets they should be on the subterran part of the planet on underneath the deep freezed oceans, underground seas and caves, that means too that the life we will find on such planets will be quite shiny and probably looking like much of the animals we find at deep see here on earth.