Constraining the CME Core Heating and Energy Budget with SOHO/UVCS

We describe the energy budget of a coronal mass ejection (CME) observed on 1999 May 17 with Ultraviolet Coronagraph Spectrometer (UVCS). constrain physical properties CME's core material as function height along corona by using spectra taken single-slit coronagraph spectrometer at heliocentric distances 2.6 and 3.1 solar radii. use plasma diagnostics from intensity ratios, such O VI doublet lines, to determine velocity, density, temperature, non-equilibrium ionization states. find that CME core's velocity is approximately 250 km/s, its cumulative heating comparable kinetic for all parameterizations we investigated. Therefore, unknown mechanisms have significantly affect eruption evolution. To understand which parameters might influence mechanism, our model rates data compare them rate generated within similar was constructed MAS code's 3D MHD simulation. The simulated agrees observationally constrained when assume quadratic power law self-similar expansion. Furthermore, agree apply parameterization accounts flux rope's magnetic being converted directly into thermal energy. This UVCS analysis serves case study importance multi-slit spectrometers studies.