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news:recent_advances_in_planet_formation [2017/03/06 16:19] (current)
samaya created
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 +Chris Ormel, University of Amsterdam
  
 +Title: Recent advances in Planet Formation
 +
 +Abstract: The past two decades have seen major exoplanet milestones. These
 +include hot-Jupiters orbiting their host stars in several days,
 +super-Earths and mini-Neptunes -- planets made up mostly of heavy
 +elements, but often inferred to contain significant amounts of
 +primordial (H/He) gas -- and very compact systems that may harbor
 +rocky planets in the so-called habitable zone.  Clearly, the
 +architectures of exoplanetary systems is very different from the
 +solar system, which raises the (formidable) question where in its
 +history planetary systems started to diverge.
 +
 +Here, I will focus on planet formation: the process that operated
 +during the first couple of million years in the presence of a
 +H/He-rich disk.  Our classical ideas on how planets form are,
 +however, tailored to the solar system and may be inadequate to
 +explain exoplanetary systems. ​ As I will explain, classical formation
 +theory is a purely local theory, where modern concepts like planet
 +migration or pebble drift do not play a role.  After reviewing the
 +classical theory, I will discuss some recent developments of my group
 +that attempt to reconcile modern planet formation theory with
 +observational constraints:​ planetesimal formation around snowlines,
 +pebble accretion, disk-planet atmosphere recycling, and
 +star-disk-planet magnetic coupling.