Our group's focus is the study of massive stars, both individually and in
resolved and unresolved populations. These objects populate the upper part
of the Hertzsprung-Russell diagram. On the main-sequence these stars are
spectroscopically identified as types O and early B, while later
evolutionary stages encompass supergiants and Wolf-Rayet stars. Our group
also studies some stars of lower mass, which may show many features similar
or related to those present in massive stars, and thus may improve our
understanding of the physical processes occurring in massive stars.
Schematic of the 3-dimensional interior structure of a rotating massive
Credit: Georges Meynet
Multicolor image of M31's southwest region with the spectacular massive-star
formation site NGC 206.