Keith Horne: Extra-solar planets
Keith Horne: Extra-solar planets
Keith Horne: Extra-solar planets
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e.g. Masset & Papaloizou,<br />
Orbital migration<br />
• Spiral waves induced by planet<br />
– Exchange angular momentum with disk<br />
• Type 1 -- no gap. Fast.<br />
– m < Saturn<br />
• Type II -- gap. Slow.<br />
– m > Saturn<br />
• Type III -- runaway<br />
– m ~ Saturn<br />
Log( M disk / M * )<br />
• Planets migrate into the star!<br />
– Need to suppress Type I migration.<br />
Gravitational Instability<br />
Type I<br />
no gap<br />
Type III<br />
Type II<br />
gap<br />
Log( m p / M * )
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