Helioseismic Diagnostics of Solar Convection and Activity

by Svestka, Zdenek; Harvey, John W.; Kosovichev, Alexander G. (CON); Duvall., Thomas L., Jr (CON)

• ISBN13: 9780792365204
• ISBN10: 0792365208
• Format: Hardcover
• Copyright: 2000-10-01
• Publisher: Kluwer Academic Pub

Summary

This book focuses on the recent advances in our understanding of solar convection and activity, and on new methods and results of helioseismic diagnostics of the internal structures and dynamics of solar convection and active regions. The methods of local helioseismology (time-distance tomography, ring-diagram analysis, acoustic imaging, and holography) intensively developed in the past few years have provided promising results on the deep structure of large-scale convection and flows, emerging active regions, and sunspots. The book includes reviews and contributed papers presented at the SOHO-9 Workshop held on July 12-15, 1999, at Stanford University, California, U.S.A. It provides a comprehensive overview of the current status of the field and presents new ideas and approaches to helioseismic diagnostics and theoretical modeling of the physical processes inside the Sun. The book is recommended for graduate students and specialists in solar physics, astrophysics, and geophysics.

Table of Contents

Preface	1	(2)
I. THEORIES OF SOLAR CONVECTION, ROTATION, AND ACTIVITY
Towards Understanding Solar Convection and Activity	3	(24)
Douglas Gough
Fluid Dynamics and MHD of the Solar Convection Zone and Tachocline: Current Understanding and Unsolved Problems	27	(22)
Peter A. Gilman
Can We Get the Bottom B?	49	(10)
Alexander Ruzmaikin
The Coupling of Solar Convection and Rotation	59	(32)
Mark S. Miesch
Realistic Solar Convection Simulations	91	(18)
Robert F. Stein
Ake Nordlund
Solar Magnetoconvection	109	(10)
N. E. Hurlburt
P. C. Matthews
A. M. Rucklidge
The Solar Dynamo and Emerging Flux	119	(22)
G. H. Fisher
D. W. Longcope
M. G. Linton
A. A. Pevtsov
On the Twist of Emerging Flux Loops in the Solar Convection Zone	141	(18)
Y. Fan
Donglai Gong
II. HELIOSEISMIC TOMOGRAPHY
Time-Distance Inversion Methods and Results	159	(18)
A. G. Kosovichev
T. L. Duvall Jr.
P. H. Scherrer
Time-Distance Helioseismology with f Modes as a Method for Measurement of Near-Surface Flows	177	(16)
T. S. Duvall Jr.
L. Gizon
Travel Time Sensitivity Kernels	193	(10)
A. C. Birch
A. G. Kosovichev
Calculation of the Sun's Acoustic Impulse Response by Multi-Dimensional Spectral Factorizaion	203	(8)
J. E. Rickett
J. F. Claerbout
Ray Travel Time and Distance for the Planer Polytrope	211	(14)
Gary H. Price
The Parabolic Wave Equation in Local Helioseismology	225	(6)
Marcus Bruggen
Sensitivity Kernels for Time-Distance Inversion	231	(10)
Jesper Munk Jensen
Bo Holm Jacobsen
Jorgen Christensen-Dalsgaard
III. ACOUSTIC IMAGING AND HOLOGRAPHY
Acoustic Imaging of Solar Active Regions	241	(20)
Dean-Yi Chou
Basic Principles of Solar Acoustic Holography	261	(24)
C. Lindsey
D. C. Braun
Helioseismic Holography of Active-Region Subphotospheres	285	(22)
D. C. Braun
C. Lindsey
Phase-Sensitive Holography of solar Activity	307	(14)
D. C. Braun
C. Lindsey
Stochastic Seismic Emission from Acoustic Glories and the Quiet Sun	321	(14)
A.-C. Donea
C. Lindsey
D. C. Braun
IV. RING-DIAGRAM ANALYSIS
Solar Shear Flow Deduced from Helioseismic Dense-Pack Sampling of Ring Diagrams	335	(16)
D. A. Haber
B. W. Hindman
J. Toomre
R. S. Bogart
M. J. Thompson
f. Hill
Near-Surface Flow Fields Deduced Using Correlation Tracking and Time-Distance Analysis	351	(12)
Marc De Rosa
T. L. Duvall Jr.
Jurri Toomre
Local Fractional Frequency Shifts Used as Tracers of Magnetic Activity	363	(10)
Bradley Hindman
Deborah Haber
Juri Toomre
Rick Bogart
V. MAGNETIC FIELDS AND OSCILLATIONS
Sunspot Oscillations: A Review	373	(22)
T. J. Bogdan
Modelling p-Mode Interaction with a Spreading Sunspot Field	395	(8)
P. S. Cally
Measuring Magnetic Oscillations in the Solar Photosphere: Coordinated Observations with MDI, ASP and MWO	403	(12)
A. A. Norton
R. K. Ulrich
Interaction between Network and Intranetwork Magnetic Fields	415	(12)
Jun Zhang
Jingxiu Wang
Chik-Yin Lee
Haimin Wang
VI. SOLAR-CYCLE VARIATIONS OF THE INTERNAL STRUCTURE AND ROTATION
Variation in Solar Sub-Surface Rotation from GONG Data 1995-1998	427	(10)
R. Howe
R. Komm
F. Hill
Time Variability of Rotation in Solar Convection Zone from SOI-MDI	437	(12)
J. Toomre
J. Christensen-Dalsgaard
R. Howe
R. M. Larsen J.Schou
M. J. Thompson
Possible Solar Cycle Variations in the Convection Zone	449	(10)
Sarbani Basu
H. M. Anita
Solar Cycle Variation in Solar f-Mode Frequencies and Radius	459	(10)
H. M.Antia
Sarbani Basu
J. Pintar
B. Pohl
Solar Cycle Variation of Large-Scale Flows in the Sun	469	(12)
Sarbani Basu
H. M. Antia
Does the Tachocline Show Solar Cycle Related Changes?	481	(6)
Sarbani Basu
Jesper Schou
Empirical Estimate of P-Mode Frequency Shift for Solar Cycle 23	487
Kiran Jain
S. C. Tripathy
A. Bhatnagar
Brajesh Kumar