Classical T Tauri stars vary much more than they should

Thursday, 4. May 2017, 11:00 - 12:30
Location Library
Moritz Günther (MIT Kavli Institute)
 
Classical T Tauri stars vary much more than they should
 
Stars are formed when large molecular clouds collapse. Accretion proceeds through a disk that is often several hundred au large. At the inner disk rim, material is ionized, couples to the stellar magnetic field and falls onto the star. We now know that this inner disk rim is a dynamic structure of bubbling, turbulent blobs of gas. I will present a few cases of T Tauri stars where we observed dramatic changes to the inner rim or even the entire disk. While we do not understand in every case what is physically going on, the data require changes to the disk structure that I would have considered impossible not too long ago.


: Moritz Günther (MIT Kavli Institute)