Ebook: SCORe ’96: Solar Convection and Oscillations and their Relationship

This volume contains the reviews and poster papers presented at the workshop Solar Convection and Oscillations and their Relationship: SCORe '96, held in Arhus, Denmark, May 27 - 31, 1996. The aim of this workshop was to bring together experts in the fields of convection and helioseismology, and to stimulate collaborations and joint research. The participation to this workshop was purposely kept limited in order to provide optimal conditions for informal discussions. In autumn of 199,5 the long-awaited GONG network of solar telescopes became fully operational and the first data already show significant improvement over existing datasets on solar oscillations. Furthermore, in December of 1995 the satellite SOHO was launched which, together with GONG, provides a major step forward in both the quantity and the quality of available solar oscillation data. It is with this in mind that we decided to organize the workshop to prepare for the optimal use of this wealth of data, with which to deepen our understanding of solar structure and specifically, of one of the longest-standing problems in solar and stellar modelling: the treatment of convection.

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The existence of strongly convecting layers in the Sun and stars provides us with a natural laboratory for the study of dynamical processes in intensely turbulent, magnetized, rotating, radiating fluids. Helioseismology has now given us a tool to measure the detailed properties of solar convection beneath the visible Sun, and thus to test our understanding of the nature of convection and of its influence on stellar structure and the radiative magnetohydrodynamics of solar convection, presenting and incorporating the newest results from numerical hydrodynamic simulations and helioseismic observations. The contributed papers present the very latest developments in each of these fields.

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The existence of strongly convecting layers in the Sun and stars provides us with a natural laboratory for the study of dynamical processes in intensely turbulent, magnetized, rotating, radiating fluids. Helioseismology has now given us a tool to measure the detailed properties of solar convection beneath the visible Sun, and thus to test our understanding of the nature of convection and of its influence on stellar structure and the radiative magnetohydrodynamics of solar convection, presenting and incorporating the newest results from numerical hydrodynamic simulations and helioseismic observations. The contributed papers present the very latest developments in each of these fields.
Content:
Front Matter....Pages i-vii
Front Matter....Pages 1-1
Effects of Convection on the Mean Solar Structure....Pages 3-22
Convective Overshooting and Mixing....Pages 23-50
Effect of Turbulent Pressure on Solar Oscillation Frequencies....Pages 51-54
Parameters of the Solar Convection Zone in Evolutionary and Seismic Models....Pages 55-58
A Calibration of Mixing Length Theory Based on RHD Simulations of Solar-Type Convection....Pages 59-64
A Precision-Controlled Solar Model with Realistic Subatmospheric Stratification....Pages 65-68
Solar Models with Convective Overshoot....Pages 69-72
Near-Surface Constraints on the Structure of Stellar Convection Zones....Pages 73-76
Front Matter....Pages 77-77
Stellar Convection; General Properties....Pages 79-103
Compressible Turbulence....Pages 105-125
Sound Speed Variations Near the Photosphere Due to Entropy Perturbations in 3D Numerical Experiments....Pages 127-130
A Hydrodynamic Simulation of The Radiation-Convection Transition Region....Pages 131-134
Photospheric Downflows: How Deep, How Coherent, How Important?....Pages 135-138
“Mesogranulation” — A Convective or An Oscillatory Phenomenon?....Pages 139-142
Front Matter....Pages 143-143
Convective Effects on Mode Frequencies....Pages 145-160
Excitation and Damping of Solar Acoustic Oscillations....Pages 161-169
On Nonlinear Solar Oscillations....Pages 171-175
Effects of Convection On Solar p Modes....Pages 177-180
The Theory of Anisotropic P-Mode Propagation in the Solar Convection Zone....Pages 181-184
Front Matter....Pages 185-185
Rotation and Angular Momentum Transport....Pages 187-200
Front Matter....Pages 185-185
The Solar Dynamo Problem....Pages 201-222
Differential Rotation in Turbulent Compressible Convection....Pages 223-226
The Effects of Rotation on the Global Dynamics of Turbulent Convection....Pages 227-230
The Effect of Rotation on Convective Overshoot....Pages 231-234
Two-Dimensional Measurements of Sunspot Oscillations....Pages 235-238
Front Matter....Pages 239-239
Acoustic Tomography of Solar Convective Flows And Structures....Pages 241-260
Dynamic Behavior of the Solar Atmosphere....Pages 261-276
The Influence of Radiative Damping on the Modes of a Magnetized Isothermal Atmosphere....Pages 277-280
Dynamical Relations Between Photosphere and Chromosphere....Pages 281-284
Photospheric Flows as Measured By SOI/MDI....Pages 285-288
The Dutch Open Telescope....Pages 289-292
The Magneto-Optical Filter in Napoli: Perspectives and Test Observations....Pages 293-296
Front Matter....Pages 297-297
Synthesis Convection, Structure And Evolution....Pages 299-309
Back Matter....Pages 311-315

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The existence of strongly convecting layers in the Sun and stars provides us with a natural laboratory for the study of dynamical processes in intensely turbulent, magnetized, rotating, radiating fluids. Helioseismology has now given us a tool to measure the detailed properties of solar convection beneath the visible Sun, and thus to test our understanding of the nature of convection and of its influence on stellar structure and the radiative magnetohydrodynamics of solar convection, presenting and incorporating the newest results from numerical hydrodynamic simulations and helioseismic observations. The contributed papers present the very latest developments in each of these fields.
Content:
Front Matter....Pages i-vii
Front Matter....Pages 1-1
Effects of Convection on the Mean Solar Structure....Pages 3-22
Convective Overshooting and Mixing....Pages 23-50
Effect of Turbulent Pressure on Solar Oscillation Frequencies....Pages 51-54
Parameters of the Solar Convection Zone in Evolutionary and Seismic Models....Pages 55-58
A Calibration of Mixing Length Theory Based on RHD Simulations of Solar-Type Convection....Pages 59-64
A Precision-Controlled Solar Model with Realistic Subatmospheric Stratification....Pages 65-68
Solar Models with Convective Overshoot....Pages 69-72
Near-Surface Constraints on the Structure of Stellar Convection Zones....Pages 73-76
Front Matter....Pages 77-77
Stellar Convection; General Properties....Pages 79-103
Compressible Turbulence....Pages 105-125
Sound Speed Variations Near the Photosphere Due to Entropy Perturbations in 3D Numerical Experiments....Pages 127-130
A Hydrodynamic Simulation of The Radiation-Convection Transition Region....Pages 131-134
Photospheric Downflows: How Deep, How Coherent, How Important?....Pages 135-138
“Mesogranulation” — A Convective or An Oscillatory Phenomenon?....Pages 139-142
Front Matter....Pages 143-143
Convective Effects on Mode Frequencies....Pages 145-160
Excitation and Damping of Solar Acoustic Oscillations....Pages 161-169
On Nonlinear Solar Oscillations....Pages 171-175
Effects of Convection On Solar p Modes....Pages 177-180
The Theory of Anisotropic P-Mode Propagation in the Solar Convection Zone....Pages 181-184
Front Matter....Pages 185-185
Rotation and Angular Momentum Transport....Pages 187-200
Front Matter....Pages 185-185
The Solar Dynamo Problem....Pages 201-222
Differential Rotation in Turbulent Compressible Convection....Pages 223-226
The Effects of Rotation on the Global Dynamics of Turbulent Convection....Pages 227-230
The Effect of Rotation on Convective Overshoot....Pages 231-234
Two-Dimensional Measurements of Sunspot Oscillations....Pages 235-238
Front Matter....Pages 239-239
Acoustic Tomography of Solar Convective Flows And Structures....Pages 241-260
Dynamic Behavior of the Solar Atmosphere....Pages 261-276
The Influence of Radiative Damping on the Modes of a Magnetized Isothermal Atmosphere....Pages 277-280
Dynamical Relations Between Photosphere and Chromosphere....Pages 281-284
Photospheric Flows as Measured By SOI/MDI....Pages 285-288
The Dutch Open Telescope....Pages 289-292
The Magneto-Optical Filter in Napoli: Perspectives and Test Observations....Pages 293-296
Front Matter....Pages 297-297
Synthesis Convection, Structure And Evolution....Pages 299-309
Back Matter....Pages 311-315
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