Helioseismic Diagnostics of Solar Convection and Activity (eBook, PDF)

Redaktion: Svestka, Zdenek; Harvey, John W.

• Format: PDF

Produktbeschreibung

This book focuses on the recent advances in our understanding of solar convection and activity, and on new methods and results of helioseismic diagnostics. It provides a comprehensive overview of the current status of the field and presents new ideas and approaches.

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Produktdetails

• Verlag: Springer Netherlands
• Seitenzahl: 578
• Erscheinungstermin: 6. Dezember 2012
• Englisch
• ISBN-13: 9789401143776
• Artikelnr.: 44184581

Inhaltsangabe

I. Theories of Solar Convection, Rotation, and Activity.- Towards Understanding Solar Convection and Activity.- Fluid Dynamics and MHD of the Solar Convection Zone and Tachocline: Current Understanding and Unsolved Problems.- Can We Get the Bottom B?.- The Coupling of Solar Convection and Rotation.- Realistic Solar Convection Simulations.- Solar Magnetoconvection.- The Solar Dynamo and Emerging Flux.- On the Twist of Emerging Flux Loops in the Solar Convection Zone.- II. Helioseismic Tomography.- Time-Distance Inversion Methods and Results.- Time-Distance Helioseismology with f Modes as a Method for Measurement of Near-Surface Flows.- Travel Time Sensitivity Kernels.- Calculation of the Sun's Acoustic Impulse Response by Multi-Dimensional Spectral Factorization.- Ray Travel Time and Distance for the Planar Polytrope.- The Parabolic Wave Equation in Local Helioseismology.- Sensitivity Kernels for Time-Distance Inversion.- III. Acoustic Imaging and Holography.- Acoustic Imaging of Solar Active Regions.- Basic Principles of Solar Acoustic Holography.- Helioseismic Holography of Active-Region Subphotospheres.- Phase-Sensitive Holography of Solar Activity.- Stochastic Seismic Emission from Acoustic Glories and the Quiet Sun.- IV Ring-Diagram Analysis.- Solar Shear Flow Deduced from Helioseismic Dense-Pack Samplings of Ring Diagrams.- Near-Surface Flow Fields Deduced Using Correlation Tracking and Time-Distance Analyses.- Local Fractional Frequency Shifts Used as Tracers of Magnetic Activity.- V. Magnetic Fields and Oscillations.- Sunspot Oscillations: A Review.- Modelling p-Mode Interaction with a Spreading Sunspot Field.- Measuring Magnetic Oscillations in the Solar Photosphere: Coordinated Observations with MDI, ASP and MWO.- Interaction between Network and IntranetworkMagnetic Fields.- VI. Solar-Cycle Variations of the Internal Structure and Rotation.- Variations in Solar Sub-Surface Rotation from GONG Data 1995-1998.- Time Variability of Rotation in Solar Convection Zone from SOI-MDI.- Possible Solar Cycle Variations in the Convection Zone.- Solar Cycle Variation in Solar /-Mode Frequencies and Radius.- Solar Cycle Variations of Large-Scale Flows in the Sun.- Does the Tachocline Show Solar Cycle Related Changes?.- Empirical Estimate of p-Mode Frequency Shift for Solar Cycle 23.- VII. Solar Convective Structures and Oscillations.- The Photospheric Convection Spectrum.- Supergranule and Mesogranule Evolution.- Supergranulation Rotation.- The Potential of Solar High-Degree Modes for Structure Inversion.- Investigating the Excitation of Acoustic Modes Using Homomorphic Deconvolution.- Response of the Radial Stratification at the Base of the Convection Zone to the Activity Cycle.- Mode Mixing by a Shallow Sunspot.