Résumé / Abstract Seminaire_IAP
« A Tour of Galactic Star Formation with Chandra »

Eric Feigelson
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).
vendredi 13 décembre 2002 - 14:00
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
Page web du séminaire / Seminar's webpage