Résumé :
While star formation regions are usually studied at long wavelengths,
they are also significant emitters of high energy X-rays. Past studies
have shown mainly magnetic flares from low mass young stars and
emission from the inner regions of OB stellar winds. The recently
launched Chandra X-ray Observatory provides unique high-resolution
imaging, spectroscopy and timing data which reveal a wealth of new
information on star forming regions. For example, we detect for the
first time X-rays from Herbig-Haro object shocks, flares from young
brown dwarfs, and large-scale hot plasma in HII regions.
This talk gives a tour of Chandra results of star forming regions
starting with the nearby L 1551 and NGC 1333 clouds, proceeding to the
rich Orion Nebula Cluster, on to the Rosette and M 17 HII regions, the
complex starburst in the Galactic Center, and ending with some results
from starburst galaxies. The findings raise a wealth of astrophysical
issues involving magnetic processes (magnetic reconnection flaring,
dynamos in fully convective stars), shock processes (HH jet and OB wind
termination shocks) and even nuclear processes (spallogenesis in
protoplanetary disks).
