Prof. dr. A.G.G.M. Tielens, Leiden Observatory, Leiden University: Astromaterial Sciences
|26 May 2011||FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen|
|Speaker:||Prof. dr. Xander Tielens|
|Affiliation:||Leiden Observatory, Leiden University|
Astromaterial sciences is the study of materials under the extreme conditions of space. At the end of their life, stars return most of their material back to the interstellar medium where it is heavily processed before becoming part of the next generation of stars and planets. Specifically, nano-sized dust grains condense in the ejecta of stars, whose composition can be analyzed through remote infrared spectroscopic observations. Stardust is isolated from meteorites whose isotopic composition betrays their origin in stellar ejecta. These data have revealed a highly diverse dust inventory, reflecting the varied physical and chemical conditions in their birthsites. In the interstellar medium, dust is highly processed by strong supernova shocks. Planet formation is initiated by the agglomeration of small dust grains driven by weak van der Waals forces. Over the last decade, a variety of laboratory and theoretical studies have elucidated the various factors involved in these processes.
This talk will highlight various aspects of this lifecycle of interstellar dust and the processes that play a role in its evolution.
|Last modified:||12 September 2014 11.22 a.m.|