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SCIENCE GOALS AND OBJECTIVES IN A RECENT WORK THE PROPOSERS HAVE IDENTIFIED A SUBSET OF SOLAR WIND AND OF INTERPLANETARY CORONAL MASS EJECTIONS (ICMES) OBSERVED BY ACE/SWICS WHOSE ANOMALOUS CHARGE STATE COMPOSITION SHOWS A LACK OF FULLY STRIPPED IONS (SUCH AS C6+ N7+ AND O8+ ZHAO ET AL. 2016) WHILE PRESERVING A NORMAL COMPOSITION FOR ALL OTHER SPECIES. THIS COMMON ANOMALY INDICATES THAT BOTH THESE SOLAR WIND AND ICME ANOMALOUS PLASMA PARCELS MAY HAVE SAME FUNDAMENTAL ACCELERATION PROCESS IN THE SOLAR CORONA WHICH MUST BE DIFFERENT FROM THE REGULAR SOLAR WIND AND DISCRIMINATES AGAINST FULLY STRIPPED IONS. THIS PECULIAR SIGNATURE CAN BE USED TO DIRECTLY INVESTIGATE THE PLASMA ACCELERATION PROCESS THAT HAS GENERATE IT. WE PROPOSE A THREE-YEAR RESEARCH PROGRAM TO STUDY THOSE ANOMALOUS SOLAR WIND AND ICMES WITH THE FOLLOWING SCIENCE GOALS: 1) TO THOROUGHLY CHARACTERIZE THE IN-SITU PROPERTIES OF THESE ANOMALOUS SOLAR WIND AND ICMES AND TO INVESTIGATE THEIR VARIATION ALONG THE SOLAR CYCLE; 2) TO IDENTIFY THEIR SOURCE REGIONS IN THE SOLAR ATMOSPHERE AND TO DETERMINE THEIR PROPERTIES; 3) TO IDENTIFY AND UNDERSTAND THE ACCELERATION PROCESS THAT PROPELS THESE PLASMA PARCELS INTO THE INTERPLANETARY SPACE. MISSION DATA WE WILL ACCOMPLISH THESE GOALS BY USING OBSERVATIONS FROM SPACE INSTRUMENTS ACROSS THE HELIOPHYSICS SYSTEM OBSERVATORY (HSO): ACE WIND STEREO SDO SOHO HINODE AND IRIS AND THE OBSERVATION OF THE JOINT ESA-NASA MISSION ULYSSES. METHODOLOGY THIS INVESTIGATION WILL BE CARRIED OUT IN THREE STEPS: 1) WE WILL ANALYZE THE COMPLETE DATASET OF THE SOLAR WIND INSITU MEASUREMENTS OBTAINED BY ACE ULYSSES AND WIND TO IDENTIFY ALL PLASMA PARCELS HAVING ANOMALOUS COMPOSITION AND DETERMINE THEIR IN-SITU PROPERTIES BOTH IN THE SOLAR WIND AND IN ICMES. 2) WE WILL MAP THE IN-SITU SOLAR WIND OBSERVATIONS BACK TO THE SURFACE OF THE SUN AND STUDY THE PROPERTIES OF THE SOURCE REGIONS. THE BACK-MAPPING WILL BE CARRIED OUT BY COMBINING THE POTENTIAL FIELD SOURCE SURFACE (PFSS) AND THE CURRENT SHEET SOURCE SURFACE (CSSS) MODELS WITH THE SOHO/MDI SDO/HMI AND HINODE/SOT DATA. THE PHYSICAL PROPERTIES OF THE SOURCE REGIONS WILL BE MEASURED USING STANDARD PLASMA DIAGNOSTICS TECHNIQUES UTILIZING THE EUV AND XRAY OBSERVATIONS FROM THE IMAGING AND SPECTROSCOPIC INSTRUMENTS ON BOARD SOHO STEREO HINODE AIA AND IRIS. THE MAGNETIC PROPERTIES OF THE WIND CORONAL SOURCE REGION WILL ALSO BE EVALUATED BY THE SEPARATRIX-WEB (S-WEB) STRUCTURE CALCULATED FROM PFSS MODEL. 3) THE ANOMALOUS WINDS IN-SITU CHARACTERISTICS AND THE PROPERTIES IN THEIR CORONAL SOURCE REGIONS WILL BE ANALYZED IN LIGHT OF LEADING MAGNETIC ACCELERATION PROCESSES TO DETERMINE THE RELATIONSHIP TO THE MAGNETIC RECONNECTION THAT ACCELERATES THESE WINDS AND TO EXAMINE IF THERE ARE DISTINCT FEATURES IN THE RECONNECTION PROCESS THAT ARE RESPONSIBLE FOR THE WINDS ANOMALOUS PROPERTIES. RELEVANCE TO MISSION AND DECADAL SURVEY GOALS THE PROPOSED INVESTIGATION IS AIMED AT DETERMINING THE FUNDAMENTAL ACCELERATION PROCESSES GENERATING THE SOLAR WIND AND ICMES. UNDERSTANDING OF THESE ANOMALOUS SOLAR WIND AND ICME EVENTS WILL PROVIDE INSIGHTS INTO HOW ICME AND SOLAR WIND PLASMAS ARE ACCELERATED AND HOW THEIR PROPERTIES ARE AFFECTED BY CORONAL CONDITIONS AND MAGNETIC CONNECTION IN SOLAR WIND SOURCE REGIONS: SUCH GOALS ARE RELEVANT TO ALL THE HSO MISSIONS WE WILL UTILIZE. THE PROPOSED INVESTIGATION IS ALSO RELEVANT TO TWO OF THE GOALS OF THE HELIOPHYSICS DECADAL SURVEY: 1) DETERMINE THE ORIGINS OF THE SUN S ACTIVITY AND PREDICT THE VARIATIONS IN THE SPACE ENVIRONMENT; 4) DISCOVER AND CHARACTERIZE THE FUNDAMENTAL PROCESSES THAT OCCUR BOTH WITHIN THE HELIOSPHERE AND THROUGHOUT THE UNIVERSE. THE PROPOSED INVESTIGATION IS ALSO CENTRAL TO NASA S STRATEGIC GOAL 1.4 UNDERSTAND THE SUN AND ITS INTERACTIONS WITH EARTH AND THE SOLAR SYSTEM INCLUDING SPACE WEATHER .

$510,821FY2020National Aeronautics and Space AdministrationNASA

Regents Of The University Of Michigan

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