Lambda Boo Abundance Patterns: Accretion from Orbiting Sources
Jura et al
The abundance anomalies in lambda Boo stars are popularly explained by element-specific mass inflows at rates that are much greater than empirically-inferred bounds for interstellar accretion. Therefore, a lambda Boo star's thin outer envelope must derive from a companion star, planet, analogs to Kuiper Belt Objects or a circumstellar disk. Because radiation pressure on gas-phase ions might selectively allow the accretion of carbon, nitrogen, and oxygen and inhibit the inflow of elements such as iron, the source of the acquired matter need not contain dust. We propose that at least some lambda Boo stars accrete from the winds of hot Jupiters.
Thursday, October 15, 2015
Some Lambda Boo Stars are Eating Their hot Jupiters
Posted by Will Baird at 4:00 PM
Labels: carbon, comet-like world, hot jupiters, lambda boo stars, nitrogen, oxygen
Subscribe to: Post Comments (Atom)
Post a Comment
Note: Only a member of this blog may post a comment.