Density Waves and Migrating Planets 3 December 2014.

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Presentation transcript:

Density Waves and Migrating Planets 3 December 2014

Star forming region in Giant Molecular Clouds

Proto- Planetar disks

Hubble Views of Proplyds

Comet and asteroid collisions

Propeller Structures

Protoplanets form, opening gaps

Inside the nebula

Propellers Again!

Summary Protoplanets in the protoplanetary disk resemble moons embedded in rings They open gaps and raise density waves Type 1 migration: waves transport momentum: as the planet loses momentum, it spirals in Type 2 migration: a gap forms and the moon is dragged in along with the disk When the star turns on, it blows away the disk, leaving the planet behind as a ‘hot Jupiter’