CHANDRA: Software on CD-rom
Chandrasekhar Sets of White Dwarfs, Neutron Stars, and Supernova Cores.
2nd edition, by James A. Green, Greenwood Research. With stellar structure software.
[ ] Large Hardback, ISBN-13: 978-1-890121-12-9 (ISBN 1-890121-12-6), 52.86 dollars
[ ] Large Paperback, ISBN-13: 978-1-890121-69-3 (ISBN 1-890121-69-X), 45.86 dollars.

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This volume presents stellar structure software and theory along with the calculation of white dwarf and supernova core structures with programmable chemistry. The software uses upper and lower sums in integrals to fix quantities between limits. Software is included on CD-rom, along with the C++ source code, so that the user may build in his own equations of state for special applications. The treatment includes rotating stars.
The package now includes Star Sketch software for the Main Sequence stars for astrocartographers. The software allows one to compute luminosity L/Lsun, mass M/Msun, radius R/Rsun, and the absolute magnitude M directly from measures of the distance, visual magnitude m, and spectral type or surface temperature of a star. The program optionally includes the effect of bolometric corrections for atmospheric absorption, so one can see their effect on these numbers. Optionally, the stellar chemistry may be specified from a list of options, and the central temperature, central density, central pressure, radiation pressure, and gas pressure are also computed. The package includes STARCAL software for modeling regular stars from their distance, visual magnitude and spectral type, plus a choice of structural model and chemistry for nuclear astrophysical modeling. Supernova progenitor reports, forecasts, and effects have also been provided.

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List of Illustrations


Chapter 1. Chandrasekar Limits Theory
Chapter 2. Associated Numerical Methods
Chapter 3. Applications of CHANDRA
Chapter 4. CHANDRA, the Program

Appendix A. General Relativity's End & Electroform Unified Field Theory.
Appendix B. Useful Results of Vector Analysis
Appendix C. Physical Constants and Measures
Appendix D. Letters from Professor S. Chandrasekhar

About the Author

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List of Illustrations
Fig.1. Prof. J.Robert Oppenheimer at a commencement.
Fig.2. Albert Einstein in his study.
Fig.3. White Dwarf Observations and Models.
Fig.4. Equations of State (graphs). Fig.5. Einstein & Oppenheimer.
Fig.6. Figure from Newton's Principia & High Flight.
Fig.7. Integration with lower and upper sums.
Fig.8. Einstein photo from Berlin newspaper.
Fig.9. The Velocity of Time, from The Vanity of Life by Cornelius Anthonizoon Teunissen.
Fig.10. Total Supernova Burst Energy, Type II.
Fig.11. Typical Chandrasekhar Limit Sets.
Fig.12. Dense Collapsed Object Structure.
Fig.13. Rotating Core Model.
Fig.14. The Vanity of Life by Cornelius Anthonizoon Teunissen.
Fig.15. Portrait of the Author.
Fig.16. Astrophysicist Subrahmanyam Chandrasekhar.
Fig.17. Sir Godfrey Kellner's Portrait of Sir Isaac Newton.
Fig.18. "Les Mysteres des Infinis" by Grandville, 1844.
Fig.19. Portrait of the Author, 1994.
Fig.20. James Clerk Maxwell.
Fig.21. Unitary Mythos. Leo vaults from Virgo with brow of Light Speed.
Fig.22. Portrait of the Author, 1994, with the legend "Nascendo Morimvr".

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Stellar structure software for Windows, with executable module chandra.exe, source code chandra.cpp in C/C++ (Borland C++ 3.1 format), and chanread.txt readme file. CHANDRA is stellar structure software for collapsed-objects by the method of Chandrasekhar and Fowler, including white dwarfs, neutron stars, and objects with more exotic equations of state. It includes rotations and chemistry selection, preparing an overall report file chandra.txt and a smaller report presented to the screen of your terminal. (Press here to view a sample chandra.txt report file.) If specified, CHANDRA also generates a detailed center-to-surface structure file for variables like temperature, pressure, density, and so forth. This download module includes the source code file chandra.cpp, which the user may modify and recompile to handle new equations of state, modified gravitation model, as desired. The complete set includes the book CHANDRA: Chandrasekhar Sets of White Dwarfs and Supernova Cores by James A. Green, available for $52.86 from Greenwood Research Books & Software, or from many other bookstores and dealers. The book CHANDRA includes this free downloadable software on CD-rom, plus a tutorial on the theoretical astrophysics treated by the software, letters from S. Chandrasekhar himself to the author written while the program was being composed, and a free copy of the old 5th edition of GRAVITATION & THE ELECTROFORM MODEL in an appendix.
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The STARCAL package includes starman.exe executable module for Windows and source code in Borland C/C++ 3.1, as well as a starcalreadme.txt file. This edition of the STARCAL software allows the user to enter the name of the star, the distance or parallax of the star, the spectral type, and the visual magnitude along with a chemistry specification. The chemistry spec may be simply standard galactic halo or galactic composition, or the user may specify the chemistry in detail. The program applies bolometric corrections for atmospheric absorption to the visual magnitude, then computes a large array of model variables for the star, including the radius, luminosity, absolute magnitude, surface temperature, central and average densities, and other measures. It uses the chemistry specification to compute the nuclear luminosity of the star from the inside out, using stellar structure theory and formulae for nuclear cross-sections. In addition, it prepares supernova forecasts for stars over 6.3 solar masses based on the stellar lifetime formulae that apply to the star, and calculates many details of the appearance of a Type II supernova explosion that might result, including the projected luminosity of the supernova, the visual magnitude over time, the probability of explosion in the next century, and so on. The program generates a report file starexp.txt that describes internal structure and fusion process cross-sections together with the supernova forecasts. (Press here to view a sample starexp.txt output report file.) The program also makes a condensed report to the screen. The nuclear luminosity calculations work best with dwarf stars like the sun that run primarily on p-p fusion. Red giant calculations are good for many variables, but not optimum with regard to nuclear luminosity. Instead, the program diagnoses the structural characteristics of the red giant deviating from normal dwarf structure. The program is useful for preparing or correcting astronomical charts incorporating astrophysical information. Some authors, for example, do not include bolometric corrections for atmospheric absorption of stellar radiation before computing the absolute magnitude, radius, and mass of a star. In addition STARCAL software makes charting of supernovae progenitors possible (Type II only), along with other novel applications. I note that STARCAL is not normalized, but computes a thermonuclear luminosity of 1.33 or so times the observed solar luminosity for the Sun when figuring solar luminosity from stellar structure theory using n=3, gamma=4/3 polytropic structural modeling. The discrepancy is probably due to difficulties in computing the exact screening factor for p-p fusion in the degenerate part of the solar core. The normalizing factor has been omitted to permit experimentation with details of the screening problem.
The complete set includes the book Thermonuclear Fusion in Stars by James A. Green from Greenwood Research, also available through and other dealers and bookstores.
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