X-rays in the Orion Nebula Cluster: Constraints on the origins of magnetic activity in pre-main sequence stars

Details X-rays in the Orion Nebula Cluster: Constraints on the origins of magnetic activity in pre-main sequence stars X-rays in the Orion Nebula Cluster: Constraints on the origins of magnetic activity in pre-main sequence stars

2002-11-04

arxiv.org/abs/astro-ph/0211049v1

Astrophys.J. 584 (2003) 911-930

Astronomy and Astrophysics

Astrophysics

51 pages, 8 figures. To appear in the Astrophysical Journal

Scientific paper

10.1086/345811

A recent Chandra/ACIS observation of the Orion Nebula Cluster detected 1075 sources (Feigelson et al. 2002), providing a uniquely large and well-defined sample to study the dependence of magnetic activity on bulk properties for stars descending the Hayashi tracks. The following results are obtained: (1) X-ray luminosities L_t in the 0.5-8 keV band are strongly correlated with bolometric luminosity with = -3.8 for stars with masses 0.7

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