AD Leonis, (dM3:l5V): Analysis of the x-ray spectrum
Raassen, A. J. J.; Mewe, R.; Audard, M.; Güdel, M.; van der Meer, R. L. J.; van den Besselaar, E. J. M.
Netherlands, Switzerland, United States
Abstract
We report the analysis of the X-ray spectrum of AD Leo (dM3.5 V), observed by RGS and EPIC-MOS on board XMM-Newton and by LETGS on board Chandra. From the lightcurve the presence of flaring states and a quiescent part is noticed. Temperatures up to 20 MIA have been determined. A significant increase of the emission measure (EM) at high temperatures is determined for the flaring state. An indication for an Inverse First Ionization Potential (IFIP) effect has been found.