Shifting and broadening of coronal spectral lines by nanoflare heating

M. LÓPEZ FUENTES; J. A. KLIMCHUK

Malargǘe, Mendoza

Congreso; 60a Reunión de la Asociación Argentina de Astronomía; 2017

Asociación Argentina de Astronomía

The heating of the solar corona by nanoflares is one of the most succesful theories in recent timesto explain the wide variety of available observations. In a recent work (López Fuentes & Klimchuk, 2015, ApJ,799, 128) we developed and analyzed a model based on coronal loops formed by elemental magnetic strands thatinteract with each other, reconnecting and consequently heating the plasma. Each of these heating events (orcluster of linked events) is considered a nanoflare. In a later article (López Fuentes & Klimchuk, 2016, ApJ, 828,86) we showed that the model reproduces the main statistical characteristics of observed coronal loop lightcurvesand the typical emission measure distributions obtained from observations. One of the predictions of the modelis the presence of intense plasma flows in the heated strands. The summed radiative emission of strands atdifferent temperatures and velocities produce spectral lines of coronal ions with characteristic broadenings andDoppler shifts. In this work, we study the contribution to emission of flows with different temperatures andvelocities obtained with our model and construct synthetic spectral lines that we plan to compare in the futurewith observational results.