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SOHO OVERVIEW

SOHO OVERVIEW. B. Klecker Max-Planck-Institut für extraterrestrische Physik, 85740 Garching, Germany Kennebunkport, MN June 9, 2010. OVERVIEW. The Beginning: SOHO & CLUSTER, the First Cornerstone of ESA’s Horizon 2000 Program SOHO Instruments & Observations

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SOHO OVERVIEW

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  1. SOHO OVERVIEW B. Klecker Max-Planck-Institut für extraterrestrische Physik, 85740 Garching, Germany Kennebunkport, MN June 9, 2010

  2. OVERVIEW • The Beginning: SOHO & CLUSTER, the First Cornerstone of ESA’s Horizon 2000 Program • SOHO Instruments & Observations • Present Status and Future Operations • SOHO Bibliometrics • Public Access to SOHO Data / Archive

  3. HORIZON 2000 PROGRAMCORNERSTONE 1: SOHO & CLUSTER SOlar and Heliospheric Observatory CLUSTER Multispacecraft Mission with 4 S/C with identical Instrumentation Launch Attempt with Ariane 5 01: 1996 Repeat with 2 Soyuz in 2000 Investigation of the Sun, SEPs, Solar Wind Launch: 2 December 1995

  4. SOHO INSTRUMENTS • CDS (Coronal Diagnostic Spectrometer) • CELIAS (Charge, Element, and Isotope Analysis System • COSTEP (Comprehensive Suprathermal and Energetic Particle Analyzer) • EIT (Extreme ultraviolet Imaging Telescope), • ERNE (Energetic and Relativistic Nuclei and Electron experiment) • GOLF (Global Oscillations at Low Frequencies) • LASCO (Large Angle and Spectrometric Coronagraph) • MDI/SOI (Michelson Doppler Imager/Solar Oscillations • Investigation) • SUMER (Solar Ultraviolet Measurements of Emitted • Radiation) • SWAN (Solar Wind Anisotropies) • UVCS (Ultraviolet Coronagraph Spectrometer) • VIRGO (Variability of Solar Irradiance and Gravity • Oscillations) • In-Situ

  5. SOHO OBSERVATIONS: UVCSSerendipity:Sungrazing Comets More than 1000 Sungrazig Comets Observed • Comet Outgassing • Evidence for dust sublimation in UVCS Spectra • Derived outgassing rates of 0.7 - 3.9 x 106 • g/s (Si) and 1.7 - 15 x 104 g/s (C) • • If the Si atoms originate in the evaporation • of molecules of forsterite or olivine, mass • loss rate from dust is ~ 4 - 50 x 106 g/s • • All grains < 12 cm in diameter likely to • evaporate in < 10 min at observed distance • of 3.37 solar radii Ciaravella et al., 2010

  6. SOHO OBSERVATIONS: MDIHELIOSEISMOLOGY - Access to the Solar Interior Zhao et al, 2009 R/RS Longitudinal Average Latitudinal Average 2D Inversion results for the sound speed perturbation near the tachoclyne; Making the Transition between radiation zone and convection zone visible

  7. SOHO OBSERVATIONS: VIRGOTotal Solar Irradiance (TSI) TSI Open Magnetic Flux TSI and Br SOHO Senior Review 2010

  8. SOHO EITExtreme Ultraviolet Imaging Telescope Active Regions at the Sun and their relation to SEPs EIT SEP Intensity-Time Profiles

  9. COROTATING INTERACTION REGIONS (CIRs)Events Related to High Speed Streams from Coronal Holes (UVCS) In the Ecliptic: High Speed Streams from Mid and Low Latitude Coronal Holes

  10. SOHO CDSCoronal Diagnostic Spectrometer • Investigating the Solar Atmosphere • Elemental abundances from • line intensities • Magnetoacoustic waves in the transition region and corona • Using simultaneous CDS measurements of oscillations in pairs of lines formed at transition region and coronal temperatures, O’Shea et al. (2006) found evidence for outward-propagating waves above the solar poles. EIT FOV

  11. SOHO LASCOLarge Angle Spectroscopic Coronograph CME Variability 1996 - 2010 Now more than 1 Solar Cycle Gopalswamy, 2007

  12. ACCELERATION AT INTERPLANETARY SHOCKSCMES, ICMES AND CME-DRIVEN SHOCKS CME ICME SOHO / LASCO Zurbuchen & Richardson, 2006

  13. ERNE / COSTEP Energetic & Relativistic Nuclei & Electron experiment / Comprehensive Suprathermal & Energetic Particle analyser • SEPs and their Source • SEP Composition (3He/4He)

  14. CELIAS / MTOFSolar Wind Isotopic Composition

  15. PRESENT STATUS AND FUTURE OPERATION 2011 and Beyond Present All Instruments are operated ESA: SOHO approved to end of 2012 NASA PLAN Continue LASCO Coronograph (not on SDO) Continue MDI in 2010 for Intercalibration with SDO/HMI (i.e. turn MDI off 2011) FY 2010: Transition from SOHO to ‘Bogart’ FY 2011 and later: Science Funding for US Science Teams phased out.

  16. SOHO BIBLIOMETRICS

  17. PUBLIC ACCESS TO SOHO DATA / ARCHIVE

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