The NASA-ESA Sentinels-Solar Orbiter Mission

Details The NASA-ESA Sentinels-Solar Orbiter Mission The NASA-ESA Sentinels-Solar Orbiter Mission

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21010502l&link_type=abstract

American Astronomical Society Meeting 210, #105.02; Bulletin of the American Astronomical Society, Vol. 39, p.231

Physics

Scientific paper

We present an overview of an ongoing study by a Joint Science & Technology Definition Team of a new mission, Heliophysics Explorers (HELEX), which combines and takes advantage of the synergies between the NASA’s LWS Sentinels mission and the ESA Solar Orbiter mission, to connect heliospheric radiation and dynamics with their solar origins. Key questions to be addressed are: What is the origin of the slow solar wind?
What is the source of solar energetic particles (SEPs)? What is the structure of transients and how do they propagate and evolve in the inner heliosphere? HELEX utilizes multi-point in situ observations to resolve spatial and temporal structure in the inner heliosphere ( 0.22-0.75 AU), together with imaging of the Sun - at times nearly co-rotating, and later at high (> 30 deg) latitudes - from deep interior through the photosphere, chromosphere, transition region, and corona. Three Sentinels-like spacecraft together with one Solar Orbiter-like spacecraft, optimized for HELEX, are planned for launch in 2015 on a single Atlas launch vehicle into trajectories with multiple Venus and Earth encounters to achieve the required orbits. HELEX will provide comprehensive measurements of the inner heliosphere - the least explored part of the solar system - and its solar origins.

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