Communications in Asteroseismology, Vol. 158 (July 2009)

The publication series of Communications in Asteroseismology (CoAst) is one of the most important international journals in the field of asteroseismology. Asteroseismology is the science concerned with stellar pulsation and stellar structure. Every six months CoAst publishes a newsletter with papers about the latest results and ongoing research projects. Besides these regular issues, special issues such as conference proceedings or software manuals are published in this series. This colloquium was the 38th Li‘ege International Astrophysical Colloquium (38thLIAC -http://www.ago.ulg.ac.be/APub/Colloques/Liac38); it was also held under the auspices of the European Helio- and Asteroseismology Network (HELAS - http://www.helas-eu.org/), the CoRoT Evolution and Seismic Tools Activity (CoRoT/ESTA - http://www.astro.up.pt/esta/) and the Belgian Asteroseismology Group (BAG - http://www.asteroseismology.be). The first part of the conference was devoted to the internal structure of massive stars with session 1 dealing with the theoretical aspects of non standard physical processes while session 2 presented the challenges met in stellar modelling when introducing these physical processes. Session 3 was a “state of the art” in atmospheres, mass loss and stellar winds in massive stars. Session 4 presented the pulsation observations in massive stars while session 5 discussed the asteroseismic signatures of the physical processes involved in their internal structure. A final session 6 was essentially focused on the interpretation of the asteroseismic observations of ground-based, MOST and CoRoT targets.