Authors: Yeimy J. Rivera (Center for Astrophysics | Harvard & Smithsonian), Parker Solar Probe & Solar Orbiter team

Parker Solar Probe (Parker) has completed multiple solar passes at the mission’s closest perihelion of 9.86 solar radii. The spacecraft is now sampling the inner heliosphere during solar maximum conditions. At this phase of the solar cycle, the Sun’s dipole axis is not aligned with its rotational axis, instead it is nearly perpendicular to it making the Sun appear on its side compared to a solar minimum orientation. In terms of its magnetic latitude, Parker’s trajectory is oriented in a polar-like orbit, similar to Ulysses. However, while Ulysses took years to sample its full extent of latitudes, Parker covers a similar range of magnetolatitudes in a matter of days and visits both hemispheres in an order of months. In accordance with its dipole axis, we observe large, low-latitude coronal holes in both magnetic hemispheres. These coronal holes were the solar sources of last few Parker perihelia that sampled fast solar wind in situ near 10 solar radii that reach above 700 km/s near 1au. Parker’s proximity to the Sun and orbit allows us to investigate the large-scale structuring of the solar wind in its sub-Alfvenic state across both magnetic sectors. We present a comparison of the solar wind properties, including energy and mass fluxes, and their associated source regions as a function of magnetolatitude in contrast to Ulysses. In the future, Solar Orbiter’s progressively inclined orbit will allow these solar wind properties to be continuously tracked as the coronal holes migrate towards the poles.