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

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Presentation on theme: "SEP Data Analysis and Data Products for EMMREM Mihir I. Desai & Arik Posner Southwest Research Institute San Antonio, Texas Mihir I. Desai & Arik Posner."— Presentation transcript:

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

2 Time- intensity profiles of 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 (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 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 Solar Energetic Particles (SEPs) only flares Old picture - up to 1990s’ Current picture - two classes First discovered - Forbush 1946 from ground based ion counters Closely related to H  flares - (Meyer 1956)

11 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 SEPs: Big Questions

12 Two-Class Picture - 70’s-90’s Reames (1995) 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)

13 Encounter suprathermal material in the corona and the IP medium 486 CME shocks (Mason et al 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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