X-ray optical depth diagnostics of T Tauri accretion shocks

Authors :: Argiroffi, C.
Maggio, A.
Peres, G.
Drake, J. J.
López-Santiago, J.
Sciortino, S.
Stelzer, B.
Argiroffi, C.
Maggio, A.
Peres, G.
Drake, J. J.
López-Santiago, J.
Sciortino, S.
Stelzer, B.
Source :: Astronomy and Astrophysics; November 2009, Vol. 507 Issue: 2 p939-948, 10p
Publication Year :: 2009
Abstract: Context. In classical T Tauri stars, X-rays are produced by two plasma components: a hot low-density plasma, with frequent flaring activity, and a high-density lower temperature plasma. The former is coronal plasma related to the stellar magnetic activity. The latter component, never observed in non-accreting stars, could be plasma heated by the shock formed by the accretion process. However its nature is still being debated.