Solar prominence diagnostics from non-LTE modelling of Mg II h&k line profiles

Aims: We investigate a new method to for obtaining the plasma parameters of solar prominences observed in Mgii h&k spectral lines by comparing line profiles from IRIS satellite bank computed with one-dimensional non-local thermodynamic equilibrium (non-LTE) radiative transfer code. Methods: Using grid 1007 non-LTE models we carry out this match spectra while accounting core shifts not present models. The prominence observations were carried on 19 April 2018. Results: is very dynamic many flows. are able recover satisfactory matches areas where single observed. recover: mean temperatures 6000 50,000K; pressures 0.01 0.5 dyne cm$^{-2}$; column masses 3.7$\times10^{-8}$ 5$\times10^{-4}$ g electron density 7.3$\times10^{8}$ 1.8$\times10^{11}$ cm$^{-3}$; and an ionisation degree ${n_\text{HII}}/{n_\text{HI}}=0.03 - 4500$. highest values found sight crosses mostly PCTR, correlating high correspondingly no H$\alpha$ emission. Conclusions: This naturally returns information how closely match, allowing user identify between can be obtained. Regions fits more likely contain model encompassing PCTR. shift also recovered method, it shows good qualitative that quantile method. demonstrates effectiveness approach