Physics
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..337a&link_type=abstract
COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
Physics
3
Flare Stars, Star Formation, Magnetohydrodynamics And Plasmas
Scientific paper
The Chandra Orion Ultradeep Project observed hundreds of T Tauri stars undergoing highly energetic X-ray flare events. Analysis of the X-ray flare decay slopes of the most energetic flares resulted in the suprising result that the magnetic loop structures involved in the flare are on the order of tens of stellar radii in length. Do these large loops represent magnetospheric accretion structures or, using a solar analogue, do they represent the eruptive flare predecessors of extreme ``coronal mass ejections'' (CMEs)? We have modeled the spectral energy distributions of this sample and find that the majority lack circumstellar disk material: these are weak-lined T Tauri stars with extremely large flares. This surprising result is the impetus for detailed analysis of the mass and angular momentum shed during events of this magnitude. Work is in progress to model a wider distribution of reconnection event energies and place the results into context with observations.
Aarnio Alicia N.
Matt Sean P.
Stassun Keivan G.
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