In this post, we will see the book Theoretical Astrophysics edited by V. A. Ambartsumyan.

# About the book

Theoretical astrophysics is the science which studies and explains, using the laws of physics, the physical processes occurring in the heavenly bodies. In doing so, wide use is made of mathematical methods, but these play only a subsidiary part.

Although theoretical astrophysics is a young and very rapidly developing science, its results are already of great importance in all branches of astronomy and in many branches of physics. The subject has been developed particularly in the USSR.Soviet scientists who work in the field of theoretical astrophysics are guided by the method of dialectical materialism, and always link their work to reality, using mathematical and physical methods as an important and powerful means of studying the heavenly bodies.

In the field of theoretical astrophysics, Soviet scientists now occupy the leading place in the world. The authors of this book have made by their investigations considerable contributions to the branches of theoretical astrophysics which they discuss. The treatment of many topics in the present work is therefore completely original, and sometimes differs sharply from anything that has been published in scientific literature. This fact should be kept in mind in studying the book.

The course is designed for university students, graduates, and scientific workers. In a new branch of science, errors are inevitable, but it is hoped that this book contains as few as possible.

The book was translated from Russian by J.B. Sykes was published in 1958.

Credits to original uploader.

You can get the book here.

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# Contents

## Part I. The theory of the radiative equilibrium of stellar photospheres and the continuous spectrum of stars

Chapter 1. Introductory remarks 1

Chapter 2. Basic concepts of the theory of radiation. The equations of transfer 3

Chapter 3. Radiative equilibrium of the stellar photosphere. The solution of the equation of transfer 10

Chapter 4. The theory of radiative equilibrium for an absorption coefficient independent of the frequency 21

Chapter 5. The coefficients of continuous absorption 31

Chapter 6. The distribution of energy in the continuous spectra of stars for an absorption coefficient depending on the frequency 56

Chapter 7. The structure of stellar photospheres 76

Chapter 8. The application of the laws of thermodynamic equilibrium to stellar photospheres 86

## Part II. The formation of absorption lines in the spectra of stars

Chapter 9. The mechanism of the formation of absorption lines in stellar atmospheres 107

Chapter 10. The solution of the equations of transfer for frequencies inside absorption lines 118

Chapter 11. The coefficients of selective absorption 127

Chapter 12. The relation between the absorption coefficients and the transition coefficients 147

Chapter 13. The interpretation of observed contours of absorption lines in stellar and solar spectra 170

Chapter 14. The variation of absorption-line contours from the centre to the limb of the solar disc. Non-coherent scattering. Central residual intensities 198

Chapter 15. Methods of studying the chemical composition of stars. 218

Chapter 16. The interpretation of the spectral sequence. The absolute-magnitude effect. The scale of effective temperatures 235

## Part III. Physics of the Solar Envelopes

Chapter 17. The structure of the solar photosphere. Granulation. Convection 256

Chapter 18. The electrodynamies of the Sun’s atmosphere 265

Chapter 19. Sunspots and faculae 290

Chapter 20. Prominences 308

Chapter 21. The chromosphere. Flocculi. Chromospheric flares 341

Chapter 22. The corona and the radio emission of the Sun 378

## Part IV. Planetary Nebulae

Chapter 23. The mechanism of the radiation of the nebulae. The temperatures of their nuclei 401

Chapter 24. The physical state of matter in the nebulae 413

Chapter 25. Radiative equilibrium in planetary nebulae 434

## Part V. Novae

Chapter 26. Nova outbursts and their interpretation 448

Chapter 27. The part played by the ejected envelopes in the evolution of novae 466

## Part VI. Stars with bright spectral lines

Chapter 28. The formation of emission lines 478

Chapter 29. Problems of the physics of stars with bright spectral lines 497

## Part VII. The internal structure of stars

Chapter 30. Basic facts 520

Chapter 31. The physical conditions inside stars 526

Chapter 32. The internal structure of stars 541

## Part VII. The scattering of light in planetary atmospheres

Chapter 33. The theory of radiative transfer in planetary atmospheres 550

Chapter 34. Comparison of theory and observation 565

## Part IX. Interstellar matter

Chapter 35. The dust component of interstellar matter 573

Chapter 36. The gaseous component of interstellar matter 602

Appendices. 616

Bibliography 623

Indexes 633

Very interesting and informative. Thank you

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