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The nuclear astrophysics of fusion processes with cosmological background, now
including STARCAL software with nuclear astrophysical modeling of stars based
on distance, visual magnitude, and spectral type supplemented by a structural
model selection and choice of chemistry. The book includes derivation of a L=(3/5)ct = 8.1 billion LY visibility limit for the Hubble Space Telescope based on observational time-delay L/c in the Hubble constant solutions for a universe of constant density, typically
H(t) = (2/3)/t, so that H(t,L) = (2/3)/(t - L/c). Picking L such that c = H(t,L)L yields 8.1 billion light-years (2484.6 Mpc) as the limit of telescopic vision, where whole well-formed galaxies appear to race away at the speed of light, since this limit corresponds to a time well after galaxy formation took place. Also included are cosmic cycle theory, helium abundance theory, galaxy formation for ellipticals, barred spirals, and spirals, star formation in early galaxies, stellar lifetime models
for the main sequence in galactic disk and halo stars, stellar structure theory
with superior handling of the luminosity partition (radiative, conductive, and
convective components of energy transport luminosity), critical mass calculations for stars to turn on to stellar nuclear reactions, sophisticated theory of the classical novae, polytropic stellar modeling, stars with radiation pressure, field theory of nuclear processes, nuclear reaction theory,
new insights into weak-interaction decay asymmetry and field theory, non-resonant and resonant nuclear reaction theory, red giant expansion theory, double-star measurements, the parallax, and observational foundations.
Stellar structure software optionally includes bolometric corrections, so that you can see their effect on results! Computes L/Lsun, R/Rsun, M/Msun, absolute magnitude M from m, distance, and spectral type, then derives standard model stellar structure variables from the center to the surface, including radiation pressure vs. gas pressure, density, and temperature. In addition, the stellar structure software includes collapsed object computation software for white dwarfs, neutron stars, supernova cores, and exotic objects with or without stellar rotation. The 2nd edition software can compute the age of the Sun from basic specifications for its observable features, by depleting the core of the Zero Age Main Sequence model for the Sun of hydrogen until the observed thermonuclear luminosity equals the computed thermonuclear luminosity. Several variants of the program are provided. For other stars, our free demoware DEPTHSTA varies the distance to star around its nominal distance until it comes into focus around the Zero Age Main Sequence distance. The 2nd edition has also been corrected for spelling and typographical errors that somehow got into print in the 1st edition, and size-reduced (8.5"x5.5") to improve the price. Source code is provided on CD-rom, not in the text. |

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DEPTHSTA uses nuclear astrophysics for stellar depth ranging, varying the nominal
distance to the star to monitor differences between the theoretical nuclear luminosity
and the observed luminosity. DEPTHSTA computes many useful astrophysical measures,
starting with a specification for the star in terms of its distance, visual magnitude, spectral type, and assumed chemistry.
CHANDRA 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. You will require WinZip to unzip chandra.zip. Search for & download free WinZip at CNET. Download WinZip 8.0
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 for a sample CHANDRA chandra.txt output summary report.)If specified, CHANDRA also generates
a detailed center-to-surface structure file for variables like temperature,
pressure, density, and so forth. (Press here for a sample CHANDRA center-to-surface report file.) 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: CHANDRASEKAR 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 diskette, 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.Bookstores | Order Direct. STARCAL The STARCAL package includes an executable module for Windows and source code in Borland C/C++ 3.1, as well as a starcalreadme.txt file and packages for superior treatment of fusion process changes due to variation of the abundances of the elements that modify electrostatic screening for fusion. Extensive supernova report software is available along with extensive fusion modeling software. 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 that describes internal structure and fusion process cross-sections together with the supernova forecasts. (Press here to view a sample starexp.txt summary 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 computes a thermonuclear luminosity of about twice 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 due to hydrogen depletion in the hydrogen-burning core, from which we can compute the age of the sun. Fundamental p-p fusion, carbon cycle, helium-burning, and other fusion results are given in unscreened, screened, and screened & normalized form with zeta calculations based on a realistic Aller 1961 abundance structure for elements heavier than helium including all elements through nickel and a more recent default specification for abundances. As a bonus for buying Thermonuclear Fusion in Stars, we are including more advanced astrophysics measures applicable to stars, such as their characteristic free-fall oscillation periods for application to Cepheids, RR Lyrae variables, and pulsating red supergiants. STARCAL also computes measures for rotating stars and other interesting stellar astrophysical information. In addition, we furnish software to compute bolometric corrections for stars based on measurements of visual magnitude made at two different zenith angles. The bolometric correction software also predicts the visual magnitude to be observed for the star at the zenith for charts, and also gives the visual magnitude expected when the star is observed from a satellite above the atmosphere in addition to the bolometric correction, which is of course correlated to the surface temperature of the star. For printouts from advanced STARCAL variants, see ANNOUNCEMENTS and below: (1) A Zero Age Main Sequence Model for the Sun, with an H-depleted core to obtain the observed luminosity and compute the solar age. (2) A 2nd-order structural model for Sun, with aged abundances. (3) A Zero Age Main Sequence model for Sirius A. (4) A Zero Age Main Sequence model for the Sun, looking backwards in time. (5) Increasing the CN concentration in Sirius to obtain the observed luminosity, using a Hubert Reeves model carbon cycle. (6) Searching for the ZAMS distance to Sirius A with DEPTHSTA. (7) Computing the 2nd-order structure of the Sun's internal abundance structure after > 4.5 billion years of stellar evolution with STAR8. (8) Examining fusion processes with FUSION. (9) Examining the supernova forecast for ANTARES with STAREXP. Proceed to Free Downloads for STAREXP, FUSION, STAR8, and other verstions of STARCAL. |
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