By NelmaS on Seg, 13/11/2017 - 21:11
Laboratoire de Météorologie Dynamique, Paris, France
Observations of gravitational waves from inspiraling compact binary systems allow us not only to measure the astrophysical properties of these systems but also In July 2015, the NASA New Horizons spacecraft flew by Pluto and revealed an amazing and complex surface, mostly covered by nitrogen, methane and carbon monoxide ices. In particular, the landscape includes extensive methane frosts and a thousand-kilometer nitrogen glacier, which seems to have eroded and shaped the mountains surrounding it. Curiously, this massive glacier is located in the so-called "Sputnik Planitia" topographic basin, near the equator. What is its origin? How do these ices evolve and interact with the thin atmosphere of Pluto?
Using 3D numerical models, we are able to simulate Pluto's atmosphere and surface on different timescales. After a short description of the history of the mission, the encounter with Pluto, and the major scientific discoveries made to date, I will present our latest results on the activity of the ices, the atmospheric circulation, the formation of the organic haze.
28 de novembro de 2017 | 12:00
Observatório Astronómico de Lisboa (Seminar room)
Tapada da Ajuda, 1349-018 Lisboa