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Title of Journal: Sol Phys

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Abbravation: Solar Physics

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Springer Netherlands

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DOI

10.1016/0378-2166(90)90053-G

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ISSN

1573-093X

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Multispacecraft Observations of CIRAssociated Io

Authors: Nina Dresing Raúl GómezHerrero Bernd Heber Reinhold MüllerMellin Robert WimmerSchweingruber Andreas Klassen
Publish Date: 2009/04/10
Volume: 256, Issue: 1-2, Pages: 409-425
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Abstract

The period between 21 June and 8 October 2007 Carrington rotations 2058 to 2061 comprising the Ulysses ecliptic plane crossing was characterized by low solar activity Excluding the small solar energetic particle events observed during July the ion increases observed in the inner heliosphere between 100 keV/n and 10 MeV/n were associated with Corotating Interaction Regions CIRs In this work we investigate CIRrelated ion increases using multipoint observations from Ulysses ACE and the twin STEREO spacecraft The ballistic backmapping technique has been used to correlate in situ observations of these spacecraft and remotesensing observations of coronal holes Although the radial longitudinal and latitudinal separation of the spacecraft except Ulysses are relatively small we find discrepancies when a detailed comparison of narrow structures like stream interfaces and CIRassociated shocks is performed Therefore we concentrate on the two CIR events from day 5 to day 10 of August 2007 and from day 25 to day 31 of August 2007 which lend themselves to a more undisturbed comparison Using the multispacecraft measurements we could determine a radial gradient of 230±30 AU−1 which is consistent with previous results by van Hollebeke et al J Geophys Res 83 4723 1978 of ∼ 350 AU−1 using Helios and Pioneer data


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Other Papers In This Journal:

  1. Coronal Mass Ejections from the Same Active Region Cluster: Two Different Perspectives
  2. Gnevyshev Peaks in the CME Average Speeds in Cycle 23
  3. Mapping Solar Wind Streams from the Sun to 1 AU: A Comparison of Techniques
  4. Non-reflective Propagation of Kink Waves in Coronal Magnetic Loops
  5. High-Energy Emission from a Solar Flare in Hard X-rays and Microwaves
  6. Estimating Electric Current Densities in Solar Active Regions
  7. Total Solar Irradiance Measurement and Modelling during Cycle 23
  8. Reduced Coronal Emission Above Large Isolated Sunspots
  9. Observational Signatures of Impulsively Heated Coronal Loops: Power-Law Distribution of Energies
  10. Transition of the Sunspot Number from Zurich to Brussels in 1980: A Personal Perspective
  11. Very High-Resolution Solar X-Ray Imaging Using Diffractive Optics
  12. Tracking of Coronal White-Light Events by Texture
  13. An Interpretation of a Possible Mechanism for the First Ground-Level Enhancement of Solar Cycle 24
  14. Velocities and Temperatures of an Ellerman Bomb and Its Associated Features
  15. Kink Wave Propagation in Thin Isothermal Magnetic Flux Tubes
  16. Ensemble Modeling of CMEs Using the WSA–ENLIL+Cone Model
  17. A Simple Way to Estimate the Soft X-ray Class of Far-Side Solar Flares Observed with STEREO/EUVI
  18. Numerical Simulation of a Solar Active Region. I: Bastille Day Flare
  19. Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind
  20. Variations in Ratio and Correlation of Solar Magnetic Fields in the Fe i 525.02 nm and Na i 589.59 nm Lines According to Mount Wilson Measurements During 2000 – 2012
  21. Oscillations in Solar Faculae. III. The Phase Relations Between Chromospheric and Photospheric Line-of-Sight Velocities
  22. A Search for Helioseismic Signature of Emerging Active Regions
  23. Subsecond (0.1 s) Pulsations in the 11 April 2001 Radio Event
  24. Global Heliospheric Parameters and Cosmic-Ray Modulation: An Empirical Relation for the Last Decades
  25. Modeling of EIS Spectrum Drift from Instrumental Temperatures
  26. Preface
  27. Emission of Type II Radio Bursts – Single-Beam Versus Two-Beam Scenario
  28. Historical Heliophysical Series of the Ebro Observatory
  29. Dynamics of an Erupting Arched Magnetic Flux Rope in a Laboratory Plasma Experiment
  30. Eclipses Observed by Large Yield RAdiometer (LYRA) – A Sensitive Tool to Test Models for the Solar Irradiance
  31. The Self-Inversion of the Sign of Circular Polarization in “Halo” Microwave Sources
  32. Recent Developments of NEMO: Detection of EUV Wave Characteristics
  33. Design and Ground Calibration of the Helioseismic and Magnetic Imager (HMI) Instrument on the Solar Dynamics Observatory (SDO)
  34. Preface
  35. Evidence that Synchrotron Emission from Nonthermal Electrons Produces the Increasing Submillimeter Spectral Component in Solar Flares

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