Joergen Christensen-Dalsgaard (Aarhus)

New insights into the evolution of red-giant stars from the Kepler mission
Wann Am 13.12.2018 von 14:30 bis 15:30
Was
  • Kolloquium
Wo SH Lecture Hall
Termin übernehmen vCal / iCal

The frequencies of oscillations observed on a stellar surface carry information about the properties of the stellar interior. Asteroseismology, i.e., the unravelling of this information, has made a huge leap thanks to the photometric observations obtained with NASA' Kepler mission, launched in 2009 to search for planets around other stars. In my talk I focus on the study of red-giant stars, showing a broad range of oscillations, probing both the outer parts and the deep core of the stars. Amongst other remarkable results, this has allowed distinguishing stars according to their nuclear energy source and provided detailed information about the properties of internal rotation in these late stages of stellar evolution. This shows that our current understanding of angular-momentum transport in stellar interiors is completely inadequate.