View Full Version : Are any field stars young?

2009-Jul-06, 10:30 AM
Do young field stars exist? Or are they fundamentally impossible, such that young stars can only be members of open clusters?

2009-Jul-06, 11:26 AM
They can exist at least in the form on runaway stars, with very large space motions of roder 100 km/s with respect to local Population I objects. When the data are good enough, these motions are found to trace back to star-forming regions, and there is a plausible case that they were ejected in three-body encounters involving original binaries. Examples include Mu Columbae and AE Aurigae; these two may have come from the same event, since backtracking puts them both in the Orion Nebulae around 2.5 million years ago.