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SEP Data Analysis and Data Products for EMMREM

This research paper discusses time-intensity profiles of protons during solar storms and the associations with flare/CME properties. It also explores the longitudinal distribution of large gradual SEPs and presents multi-spacecraft observations. The paper further highlights the importance of characterizing the azimuthal distribution of SEPs using STEREO and mentions additional datasets for analysis. The goal is to provide event lists, time-histories, energy spectra, peak intensities, and radial/longitudinal distributions for inputs into the module. The paper also addresses validation using MSL/RAD and LRO/CRaTER only flares.

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SEP Data Analysis and Data Products for EMMREM

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  1. SEP Data Analysis and Data Products for EMMREM Mihir I. Desai & Arik Posner Southwest Research Institute San Antonio, Texas

  2. Time-intensity profiles of 0.1 - 500 MeV protons during the 2003 October-November storms

  3. Solar event associations, Flare/CME properties

  4. Proton, Helium & Oxygen fluences for an SEP event

  5. Longitudinal Distribution of large gradual SEPs Cane et al (1986)

  6. Multi-spacecraft observations Kallenrode et al. 1993 (Solar Physics).

  7. STEREO will characterize the azimuthal distribution of SEP Properties

  8. Instruments & Energy coverage Add other datasets: e.g, SoHO/ERNE;Messenger

  9. SEP Analysis & Products for EMMREM • Event lists, and products for inputs into module • Time-histories • Energy Spectra • Peak Intensities • Format (?) • Radial and Longitudinal Distributions • Moon orbit • Mars • Radial Alignment • Longitudinal extrapolation (how without SEP propagation) • Validation using MSL/RAD; LRO/CRaTER

  10. only flares Solar Energetic Particles (SEPs) Old picture - up to 1990s’ • First discovered - Forbush 1946 from ground based ion counters • Closely related to H flares - (Meyer 1956) • Kahler et al. (late 1970s and early 1980s) found strong correlation with CMEs • Cane et al. (1986) made association with 2 types of radio bursts Current picture - two classes

  11. SEPs: Big Questions • Where? • At CME-shocks or in flares • Source material? • Ambient corona, solar wind, or other • Mechanisms? • Reconnection or CME-shock acceleration • Transport to Earth? • Scattering, Turbulence, fluctuations

  12. Two-Class Picture - 70’s-90’s Wild et al. (1963) Lin (1970) Pallavacini et al (1974) Kahler et al. (1978) Mason et al. (1984; 1986) Cane et al. (1986; 1988; 1991) Reames 1988; 1995; 1999) Reames (1995)

  13. 486 CME shocks Encounter suprathermal material in the corona and the IP medium (Mason et al. 1999 ApJ, 525, L133).

  14. Emerging Picture - since-90’s Two-stage acceleration process STEP 1: Production of a suprathermal seed populations STEP 2: Acceleration at CME-driven shocks Image Credit: ILWS Sentinels Science Definition Team Report

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