SIMBAD references

We explore the idea that the occurrence of nano-flares in a magnetic loop around the O VI formation temperature could explain the observed red-shift of mid-low transition region lines as well as the blue-shift observed in low coronal lines (T>6x10⁵K). Observations are compared to numerical simulations of the response of the solar atmosphere to an energy perturbation of 4x10²⁴ergs representing an energy release during magnetic reconnection in a 1-D semi-circular flux tube. The temporal evolution of the thermodynamic state of the loop is converted into C IV 1548, O VI 1032 and Ne VIII 770 line profiles in non-equilibrium ionization. Performing an integration over the entire period of simulations, a redshift of ∼6km/s is found in C IV, while a blue-shift of ∼2km/s and ∼10km/s were derived for O VI and Ne VIII, respectively, in reasonable agreement with observations.