Advances in Helio- and Asteroseismology: Proceedings of the 123th Symposium of the International Astronomical Union, Held in Aarhus, Denmark, July 7–11, 1986

Front Matter....Pages i-xxi
Front Matter....Pages 1-1
An Overview Of Helio- and Asteroseismology....Pages 3-19
Front Matter....Pages 19-19
Helioseismology from the South Pole The 1984/85 campaign....Pages 21-23
Splitting of the Low ℓ Solar p Modes....Pages 25-28
Helioseismic Observations at Stanford, 1977–1986....Pages 29-32
Observations of Solar Global Oscillations (1983–1985) And Potential Influence of Terrestrial Sources of Errors....Pages 33-36
Intermediate Degree Solar Oscillations....Pages 37-40
Measurements of Solar Internal Rotation Obtained with the Mt. Wilson 60-Foot Solar Tower....Pages 41-44
Solar Equatorial Rotation Rate Inferred From Inversion of Frequency Splitting of High-Degree Modes....Pages 45-48
Rotation in the Solar Convection Zone Inferred from Fabry-Perot Observations of the 5-Min Oscillations....Pages 49-52
Comparison of Solar Oscillation Data Obtained from a Study of the Na and K Fraunhoffer Absorption Lines....Pages 53-57
Response of the Solar Five-Minute Oscillations to a Major Flare....Pages 59-62
Solar 5-min Oscillation Amplitude Anisotropy and Doppler Velocity Systematics....Pages 63-65
Ground Based Observations of Solar Luminosity Oscillations....Pages 67-69
Earth Based Observations of Solar Luminosity Oscillations....Pages 71-74
On the 160 Minute Oscillation....Pages 75-78
Search For Solar G-Modes from 1981 to 1985....Pages 79-82
Solar Gravity Modes from Acrim/Smm Irradiance Data....Pages 83-86
Limb Darkening Oscillations: The Discrepancy with Doppler Data and the 160-Minute Period....Pages 87-88
Front Matter....Pages 89-89
Sensitivity of Solar P-Modes To Solar Envelope Structure....Pages 91-94
A Solar Model With Turbulent Diffusion Mixing: Surface Abundances And Oscillations....Pages 95-98
Front Matter....Pages 89-89
The Influence of a Modified Mixing-Length Theory and of an Adopted Description of the Atmosphere on the Solar Five-Minute Oscillations....Pages 99-103
Constraints on Central Solar Conditions from Helioseismology and Neutrino Counts....Pages 105-109
Do Solar Models with Weakly Interacting Massive Particles Reproduce the Stanford Seismic Data?....Pages 111-114
The Study of Oscillations Localized Near a Layer of Density Discontinuity in an Example of Solar Model....Pages 115-116
Inertial Modes Trapped in the Solar Convective Envelope....Pages 117-117
Non-Newtonian Forces and the Observed Solar Oscillation Spectrum....Pages 119-119
Asymptotic Properties of Low Degree Gravity Modes....Pages 121-124
Stellar Acoustic Ray Patterns....Pages 125-128
An Optimal Approach to the Inverse Problem....Pages 129-132
Inverse Problem: Acoustic Potential vs Acoustic Length....Pages 133-136
On the Technique of the Inversion of Helioseismological Data....Pages 137-140
An Attempt to Determine the Structure of the Solar Core from Observed G-Mode Frequencies....Pages 141-146
Inversion of Asymptotic Gravity-Mode Frequencies and its Application to the Sun....Pages 147-150
A Search of the Effects of Magnetic Field in the Solar Five-Minute Oscillations....Pages 151-154
Magnetic Perturbations to Stellar Oscillation Eigenfrequencies....Pages 155-160
Magnetic Effects on Solar p-Modes....Pages 161-165
The Effect of Toroidal Magnetic Fields in the Overshoot Layer on the Eigenfrequencies of Stellar Oscillations....Pages 167-170
The Magnetic Field Inside the Sun....Pages 171-174
On the Implications of the Symmetric Component of the Frequency Splitting Reported by Duvall, Harvey and Pomerantz....Pages 175-180
Sunspot Seismology....Pages 181-182
Front Matter....Pages 89-89
Oscillations in Sunspot Umbra, -Penumbra and the Surrounding Photosphere....Pages 183-186
The Energy Conversions and Enhancement Caused by the Unsteady Plasma Motion in the Active Region....Pages 187-190
Radial and Non-Radial Oscillations of Spherically Symmetric Stellar Systems....Pages 191-194
Front Matter....Pages 195-195
Time Variations of the Frequencies of Low-Degree Solar P-Modes....Pages 197-200
Solar Cycle Dependence of Solar p Modes....Pages 201-204
The Solar Oscillations Spectrum and the Solar Cycle....Pages 205-209
The 13 Day Period Oscillation and the Solar Cycle....Pages 211-214
Variations in the Mean Line of Sight Velocity of the Sun: 1976 – 1985....Pages 215-218
Study of Long Period Global Oscillations of Sun Through Spherical Harmonic Fourier Analysis of Sunspot Activity....Pages 219-222
Long Periods in Diameter, Irradiance and Activity of the Sun....Pages 223-226
Solar Diameter and Solar Rotation During the Maunder Minimum....Pages 227-230
Front Matter....Pages 231-231
Asteroseismology: Results and Prospects....Pages 233-247
Evidence for global pressure oscillations in Procyon and α Centauri....Pages 249-252
A Photometric Search for ‘5-min’ Oscillations in the Components of Alpha Centauri and Two Other Double Stars....Pages 253-254
A Spectroscopic Search for Oscillations in the 769.9 nm Potassium Line of Procyon....Pages 255-259
The Rich p-Mode Pulsation Spectrum of HD 60435....Pages 261-264
Search for Oscillations in Some Ap Stars....Pages 265-268
A Search for Rapidly Oscillating Ap Stars in the Northern Hemisphere....Pages 269-272
The Radius and the Pulsation Constant of the Primary of Spica....Pages 273-276
A Survey for Doppler-Shift Oscillations in K Giants....Pages 277-280
Front Matter....Pages 231-231
Modeling The Global Oscillations OF Epsilon Eridani....Pages 281-284
Stellar Models of ε Eridani Constrained by Stellar Seismology....Pages 285-286
Internal Constitution And Oscillation Spectrum Of Procyon....Pages 287-289
Helium Diffusion In Rapidly Oscillating Ap Stars....Pages 291-294
A Hertzsprung-Russell Diagram For Stellar Oscillations....Pages 295-298
Can Stellar Mass be Measured by Asteroseismology?....Pages 299-302
Front Matter....Pages 303-303
Seismological Investigations of Compact Stars....Pages 305-324
An Improved Limit for the Rate of Period Change in the ZZ Ceti Star G117-B15A....Pages 325-328
The Stellar Seismology of the Hot White Dwarf Star PG1159-035....Pages 329-332
Pulsations of White Dwarf Stars with Thick Hydrogen or Helium Surface Layers....Pages 333-337
The Non Linear Dynamic of the ZZ Ceti Variable GD 66....Pages 339-342
Front Matter....Pages 343-343
Excitation and Damping of Solar and Stellar Oscillations....Pages 345-357
What do the Observations Tell us About the Excitation of Solar Oscillation Modes?....Pages 359-362
The Role of Nuclear Reactions in the Excitation of Stellar Oscillations....Pages 363-369
On the Excitation of Solar Five-Minute Oscillations....Pages 371-374
Influence of the Perturbation of the Reynolds Tensor on the Stability of the Solar 5 Minute Oscillations....Pages 375-378
Interaction of Convection and Oscillations in the Solar Atmosphere: numerical results....Pages 379-382
Gravity Wave Generation by Large Scale Bubbles....Pages 383-386
The Evolution to Steady Nonlinear Pulsation in Stellar Models....Pages 387-391
Finally a Double-Mode RR Lyrae Model?....Pages 393-394
Front Matter....Pages 343-343
Overstable Convection in a Non-Uniform Magnetic Field....Pages 395-398
The Critical Mass for the Overstability of Massive Zero-Age Main Sequence Stars....Pages 399-402
Front Matter....Pages 403-403
Diagnosis of the Solar Atmosphere Using Solar Oscillations....Pages 405-419
Chromospheric Seismology....Pages 421-424
Infrared Helioseismology: Detection of the Chromospheric Mode....Pages 425-428
Variations of the Solar Limb Brightness with the Oscillations....Pages 429-432
Oscillatory Properties of Meso-Scale Intensity Structures at Chromospheric Level....Pages 433-437
On the Energy of Short Period Acoustic Waves in the Solar Atmosphere....Pages 439-442
Convective Overshoot And Upper Boundary Conditions....Pages 443-446
Variation of the Generalized Compton Red Shift in the Sun....Pages 447-450
Front Matter....Pages 451-451
Techniques for Observing Solar Oscillations....Pages 453-465
Continuous Magnetic Calibration of (Velocity) Sensitivity of Oscillation Spectrometers....Pages 467-469
Full-Disk Solar Dopplergrams Observed with a 1024 X 1024-Pixel CCD Camera....Pages 471-474
Performance of a Stabilized Fabry-Perot Solar Analyzer....Pages 475-479
Infrared Heterodyne Spectroscopy: A Tool for Helioseismology....Pages 481-484
A Bayesian Approach to Ridge Fitting in the ω - k Diagram of the Solar Five-Minute Oscillations....Pages 485-489
Automated p-Mode Identification Using Bayes’ Theorem....Pages 491-494
Front Matter....Pages 495-495
Techniques For Observing Stellar Oscillations....Pages 497-511
Sodium cell spectrophotometer for detection of stellar oscillations....Pages 513-516
Multiplexed Interferometric Stellar Oscillation Spectrometry — MISOS....Pages 517-520
Front Matter....Pages 495-495
The Precision Calcium Photometer: A New Instrument for Astroseismology....Pages 521-524
Front Matter....Pages 525-525
Space Observations of Solar and Stellar Oscillations....Pages 527-534
Experience in Operating a Limited Global Network of Stations Measuring Full-Disc Oscillations of the Sun....Pages 535-539
Requirements of a Network Telescope....Pages 541-544
Helioseismology from Space, the SOHO Project....Pages 545-548
Prospect for Stellar Seismology on Board an Interplanetary Spacecraft....Pages 549-553
Observations of Stellar Oscillations with the Hubble Space Telescope....Pages 555-558
Front Matter....Pages 559-559
Overview of the Conference: Implications of Seismological Data for Astrophysics....Pages 561-575
Front Matter....Pages 577-577
The Discovery of Late Twentieth Century Mød Man....Pages 579-583
An Extremely High ‘Q’ueue Value Applied to Seismological Meetings....Pages 585-585
Back Matter....Pages 587-604