Improved AWSoM Modeling of the First Two PSP Encounters

NASA's Parker Solar Probe (PSP) has collected data for the first two encounters. We have modeled the solar corona and inner heliosphere of these encounters using the Alfvén Wave Solar atmosphere Model (AWSoM, van der Holst et al. 2014) with GONG-ADAPT magnetograms. AWSoM allows us to interpret the PSP data in the context of coronal heating via low-frequency Alfvén wave turbulence with partial wave reflection due to Alfvén speed gradients. In van der Holst et al. (2019), we made predictions for the first encounter. In our new simulations we show how improved partitioning of the wave dissipation to the electron and anisotropic proton temperatures and better grid design result in significantly improved comparison with the PSP data. We also show the simulated distance of PSP to the heliospheric current sheet, the magnetic connectivity of PSP to the photosphere, and whether PSP was in the fast or slow wind.