Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..219..211f&link_type=abstract
Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held
Astronomy and Astrophysics
Astrophysics
Scientific paper
Late-type stars exhibit their highest levels of magnetic activity during their pre-main sequence (PMS) phases. Imaging X-ray studies of young stellar clusters are effective for studying this activity in large populations. This talk highlights recent results from the Chandra X-ray Observatory particularly from the Orion Nebula Cluster where over a thousand stars are seen. Early results from the January 2003 10-day ultradeep Orion Nebula project will be shown.
The talk outlines the implications for several astrophysical issues: the nature of magnetic reconnection in PMS stars and its relationship to the circumstellar disk; the absence of an activity/rotation relationship and possible implications for dynamo processes in fully convective stars; the characterization of flaring in PMS aolar analogs and implications for a spallogenic origin of enigmatic radionuclides in ancient meteorites.
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