TW Hya: Spectral variability, X-rays, and accretion diagnostics

por Dupree, A.K., Brickhouse, N.S., Cranmer, S.R., Luna, G.J.M., Schneider, E.E., Bessell, M.S., Bonanos, A., Crause, L.A., Lawson, W.A., Mallik, S.V., Schuler, S.C.