Skip Navigation
  • UC Riverside
  • University Advancement
  • Strategic Communications

Planet formation at home and abroad

Hilke E. Schlichting- UCLA

Thursday, October 12, 2017
  3:40–5 p.m.

Location: Chung Hall Room 138
  Parking Information

Category: Colloquium

Description: Recent observations by the Kepler space telescope have led to the discovery of more than 4000 exoplanet candidates consisting of many systems with Earth- to Neptune-sized objects that reside well inside the orbit of Mercury, around their respective host stars. How and where these close-in planets formed is one of the major unanswered questions in planet formation. I will present new results that self-consistently treat the nebular gas accretion onto rocky cores and the subsequent evolution of gas envelopes due to cooling and photo-evaporation following the dispersal of the protoplanetary disk. I will demonstrate that planets shed their outer layers (dozens of percent in mass) following the disk's dispersal (even without photo-evaporation), and that their atmospheres shrink in a few Myr to a thickness comparable to the radius of the underlying rocky core. In addition, I will discuss the importance of collisions in shaping the architecture and composition of super-Earths. Finally, I will conclude with comparing our new results with observations and discussing the implications for the origin and formation of terrestrial planets in our solar system and for close in exoplanets.

Additional Information: Colloquia & Seminars

Open to: General Public
Admission: Free
Sponsor: Physics and Astronomy

Contact Information:
Naveen Reddy