Freefloating Planets

Seminar Date: 
11 Oct 2016 - 14:00
Bo Reipurth
University of Hawaii

Planets are customarily assumed to be orbiting a star, consistent with the planets in our own Solar System. But in the past decade a population of ultra-lowmass objects with masses and temperatures comparable to gas giant planets have been found in star forming
regions, and microlensing surveys have uncovered a number of such lowmass objects which statistically point to a huge population of freefloating planetary mass objects in our Galaxy. I discuss possible
mechanisms for the formation and ejection of such objects and speculate on their role in a wider astrobiological perspective.