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Solar Radiation Physical Modeling (SRPM)

Solar Radiation Physical Modeling (SRPM). J. Fontenla June 30, 2005b. Mean Intensity. Emitted Spectra. Radiative Losses. and Net Radiative. Brackett. Atomic. Molecular. Continua. Continua. Atomic Data. Radiative Transfer. Molecular Data. Non-LTE. Molecular. Atomic.

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Solar Radiation Physical Modeling (SRPM)

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  1. Solar Radiation Physical Modeling (SRPM) J. FontenlaJune 30, 2005b

  2. Mean Intensity Emitted Spectra Radiative Losses and Net Radiative Brackett Atomic Molecular Continua Continua Atomic Data Radiative Transfer Molecular Data Non-LTE Molecular Atomic Lines Lines Populations & Ionization Balance Populations & Ionization Atmospheric Parameters Momentum & Energy Balance

  3. Critical Next Steps • Adjust photospheric models and abundances • Low first-ionization-potential (FIP) contribute to ne and photospheric opacity • High FIP are needed for upper layers • Re-think lower chromosphere • Account for radio data showing Tmin<4200 K • Account for UV continua from SOHO-SUMER showing high Tmin • Account for molecular lines (CN, CH, CO) showing low Tmin • Re-think upper chromosphere with current abundances and observations • Re-compute transition region with updated abundances, atomic data, diffusion and flows, and energy-balance • MHD, full-NLTE, 3D simulations of chromospheric variations • Prominence eruptions-CMEs

  4. Low Chromosphere Issues Fe & C abundance seem good C I line But computed CN lines are not good. Are abundances incorrect? Or is the model chromosphere incorrect?

  5. H Ionization and Ly Alpha Line

  6. V1.5 Ly Computed Profiles • Continuum too high due to Sulphur continuum • Not enough contrast for faculae and plage • Umbra profile has reversal unlike the observed

  7. For each species and ionization stage Trace Species Ionization • Or split the abundance and ionization

  8. Chromospheric Magnetic Heating Mechanism Farley-Buneman Threshold Term U, JHall E,JPed B Uthr=Cs(1+ψ)

  9. Prominence-Eruption-CME • 3-D non-LTE radiative transfer & MHD modeling • Instrumentation for observing Doppler spectra, spatial- and temporal-evolution

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