By Arthur N. Cox
This new, fourth, version of Allen's vintage Astrophysical amounts belongs on each astronomer's bookshelf. it's been completely revised and taken modern through a workforce of greater than 90 the world over popular astronomers and astrophysicists. whereas it follows the elemental structure of the unique, this vital reference has grown to greater than two times the dimensions of the sooner variations to house the good strides made in astronomy and astrophysics. It contains unique tables of the newest facts on: - basic constants and devices - Atoms, molecules, and spectra - Observational astronomy in any respect wavelengths from radio to gamma-rays, and neutrinos - Planetary astronomy: Earth, planets and satellites, and sun process small our bodies - The sunlight, basic stars, and stars with specific features - Stellar populations - Cataclysmic and symbiotic variables, supernovae - Theoretical stellar evolution - Circumstellar and interstellar fabric - big name clusters, galaxies, quasars, and lively galactic nuclei - Clusters and teams of galaxies - Cosmology. in addition to a lot explanatory fabric and broad and up to date bibliographies.
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Additional info for Allen’s Astrophysical Quantities
2 Excitation Cross Section (permitted Transitions) An approximation for Qex, the excitation cross section of an atom (see [30,37]), is given. n 2: 1 (notation of Chap. 5). 09121).. with ).. in JLm), and E is the electron energy before collision, also in Ry. 8. 8. Numerical/actors b and bW IE. 9). 9. Numerical/actors pew I kT) and WI kT. 9. 20 Note a E 1( ) is the first exponential integral. The tabulated P(W j kT) are too small when the total quantum number of Chap. 5 is unchanged. The approximations quoted should be replaced by quantum calculations when available (see [30,38-40]).
4A. 439 K ) T Tel, with Bv , We, Tel (= electronic excitation energy) in em-I. 13, but upper level constants [46, 47] are required for dissociation calculations. 12.
Phys. Chem. Ref Data, 22,1213 (Gel-XXXII) 18. , & Musgrove, A. 1991, J. Phys. Chem. Ref Data, 20,859 (KrI-xxxvI) 19. , & Musgrove, A. 1988, J. Phys. Chem. Ref Data, 17, 155 (Mo I-XLII) 20. , & Hagan, L. 1978, Nat!. Stand. Ref. Data Ser. (Nat!. Bur. ) 60 (Rare-Earth Elements) 21. N. 1988, J. Phys. Chern. Ref. 6. Electron affinities [1-2]. 238 References \ 1. Astrophysical Quantities, 1, § 17; 2, § 17; 3, § 17 2. Handbook of Chemistry and Physics. 77th ed. ) , E where X is the ionization energy in rydbergs (Ry), E the electronic energy before collision in Ry, and n the number of optical electrons.
Allen’s Astrophysical Quantities by Arthur N. Cox