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We present a new way of describing the flares from Sgr A* with aself-consistent calculation of the particle distribution. All relevantradiative processes are taken into account in the evolution of the electrondistribution and resulting spectrum. We present spectral modelling for newX-ray flares observed by NuSTAR, together with older observations in differentwavelengths, and discuss the changes in plasma parameters to produce a flare.We show that under certain conditions, the real particle distribution candiffer significantly from standard distributions assumed in most studies. Weconclude that the flares are likely generated by magnetized plasma consistentwith our understanding of the accretion flow. Including non-thermalacceleration, injection, escape, and cooling losses produces a spectrum with abreak between the infrared and the X-ray, allowing a better simultaneousdescription of the different wavelengths. We favour the non-thermal synchrotroninterpretation, assuming the infrared flare spectrum used is representative. Wealso consider the effects on Sgr A*s quiescent spectrum in the case of adensity increase due to the G2 encounter with Sgr A*.

Exploring plasma evolution during Sagittarius A* flares