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The University College Computer Package for the Calculation of Atomic data

Aspects of Development and Application

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Atoms in Astrophysics

Abstract

In 1955 M. J. Seaton(1) indulged in a short flirtation with Fe II. He did not go further than was considered appropriate at the time, but just offered an estimate of the upper limit for a crucial cross section. The title of that paper is “The kinetic temperature of the interstellar gas in regions of neutral hydrogen,” and the abstract of that paper begins:

The paper is mainly concerned with the cooling resulting from excitation by electron impact of low-lying levels in C+, Si+, and Fe+. The collision cross sections have been calculated by quantal methods for C+ and have been estimated for Si+ and Fe+; the precision of the results obtained should be adequate for the present problem. The chemical composition of the gas is assumed to be similar to typical stellar compositions; this assumption is shown to be reasonable but it is not established with certainty.

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References

  1. M.J. Seaton, The kinetic temperature of the interstellar gas in regions of neutral hydrogen, Ann. Astrophys. 18, 188–205 (1955).

    ADS  Google Scholar 

  2. H. Nussbaumer and P. J. Storey, Atomic data for Fe II, Astron. Astrophys. 89, 308–313 (1980).

    ADS  Google Scholar 

  3. H. Nussbaumer, M. Pettini, and P. J. Storey, Sextet transitions in Fe II, Astron. Astrophys. 102, 351–358 (1981).

    ADS  Google Scholar 

  4. M. J. Seaton, The Hartree-Fock equations for continuous states with applications to electron excitation of the ground configuration terms of O I, Philos. Trans. R. Soc. Lond. Ser. A 245, 469–499 (1953).

    Article  ADS  MATH  Google Scholar 

  5. M. J. Seaton, Electron excitation of forbidden lines occurring in gaseous nebulae, Proc. Roy. Soc. A 218, 400–416 (1953).

    Article  ADS  MATH  Google Scholar 

  6. M. H. Hebb and D. H. Menzel, Collisional excitation of nebulium, Astrophys. J. 92, 408–423 (1940).

    Article  ADS  Google Scholar 

  7. T. Yamanouchi, T. Inui, and A. Amemiya, Excitation of metastable states of oxygen atom by electron impact, Proc. Phys. Math. Soc. Jpn. Ser. 3, 22, 848–854 (1940).

    Google Scholar 

  8. L. A. Aller, Target areas for the collisional excitation of nebular lines, Astrophys. J. 111, 609–610 (1950).

    Article  ADS  Google Scholar 

  9. D. R. Bates, A. Fundaminsky, J. W. Leech, and H. S. W. Massey, Excitation and ionization of atoms by electron impact—the Born and Oppenheimer approximations, Philos. Trans. R. Soc. Lond. Ser. A 243, 93–141 (1950).

    Article  ADS  MATH  Google Scholar 

  10. E. U. Condon and G. H. Shortley, Theory of Atomic Spectra, Cambridge University Press, London, 1935.

    Google Scholar 

  11. I. S. Bowen, The origin of the nebular lines and the structure of planetary nebulae, Astrophys. J. 67, 1–15 (1928).

    Article  ADS  Google Scholar 

  12. B. Edlen, An attempt to identify the emission lines in the spectrum of the solar corona, Ark. Mat. Astron. Fys. 28B, 1–4 (1941).

    Google Scholar 

  13. B. Edlén, Die Deutung der Emissionslinien im Spektrum der Sonnenkorona, Z. Astrophys. 22, 30–64 (1942).

    ADS  Google Scholar 

  14. W. Grotrian, Zur Frage der Deutung der Linien im Spektrum der Sonnenkorona, Naturwissenschaften 27, 214 (1939).

    Article  ADS  MATH  Google Scholar 

  15. I. S. Bowen and B. Edlén, Forbidden lines of Fe vn in the spectrum of Nova Pictoris (1925), Nature 143, 373 (1939).

    Article  ADS  Google Scholar 

  16. P. Swings, Finale in Mem. Soc. R. Sci. Liege Ser. 5 17, 407 (1969).

    Google Scholar 

  17. H. Van Regemorter, Rate of collisional excitation in stellar atmospheres, Astrophys. J. 136, 906–915 (1962).

    Article  ADS  Google Scholar 

  18. S. R. Pottasch, On the interpretation of the solar ultraviolet emission line spectrum, Space Sei. Rev. 3, 816–855 (1964).

    ADS  Google Scholar 

  19. W. M. Burton, A. Ridgeley, and R. Wilson, The ultraviolet emission spectrum of the solar chromosphere and corona, Mon. Not. R. Astron. Soc. 135, 207–223 (1967).

    ADS  Google Scholar 

  20. A. H. Gabriel, B. C. Fawcett, C. Jordan, Classification of iron lines in the spectrum of the sun and zeta in the range 167 to 220 Å, Nature 206, 390–393 (1965).

    Article  ADS  Google Scholar 

  21. A. H. Gabriel and B. C. Fawcett, Identification of the solar spectrum in the region 60 to 170 Å, Nature 206, 808–809 (1965).

    Article  ADS  Google Scholar 

  22. C. E. Moore, An Ultraviolet Multiplet Table, Circular No. 488, National Bureau of Standards, Washington, D.C., 1950.

    Google Scholar 

  23. D. E. Osterbrock, Expected ultraviolet emission spectrum of gaseous nebula, Planet. Space Sci. 11, 621–632 (1963).

    Article  ADS  Google Scholar 

  24. M. J. Seaton, Thermal inelastic collision processes, Rev. Mod. Phys. 30, 979–991 (1958).

    Article  ADS  Google Scholar 

  25. M. J. Seaton, The Theory of Excitation and Ionization by Electron Impact, in Atomic and Molecular Processes, D. R. Bates, Ed., Academic Press, New York, pp. 374–420.

    Google Scholar 

  26. M. Schmidt, Large redshifts of five quasistellar sources, Astrophys. J. 141, 1295–1300 (1965).

    Article  ADS  Google Scholar 

  27. G. Racah, Theory of complex spectra, Phys. Rev. 62, 438–462 (1942).

    Article  ADS  Google Scholar 

  28. E. Godfredsen, Atomic term energies for atoms and ions with 11 to 28 electrons, Astrophys. J. 145, 308–332 (1966).

    Article  ADS  Google Scholar 

  29. W. Eissner and H. Nussbaumer, A programme for calculating atomic structures, J. Phys. B 2, 1028–1043 (1969).

    Article  ADS  Google Scholar 

  30. W. Eissner, H. Nussbaumer H. E. Saraph, and M. J. Seaton, Resonances in cross sections for excitation of forbidden lines in O2 +, J. Phys. B 2, 341–355 (1969).

    Article  ADS  Google Scholar 

  31. D. R. Flower and M. J. Seaton, Forbidden line radiation from gaseous nebulae, M km. Soc. R. Sci. Liège Ser. 5 17, 251–268 (1969).

    Google Scholar 

  32. H. Nussbaumer, Oscillator strengths in complex atoms: applications to N iv, Mon. Not. R. Astron. Soc. 145, 141–150 (1969).

    ADS  Google Scholar 

  33. H. Nussbaumer and D. E. Osterbrock, On the forbidden emission lines of iron in Seyfert galaxies, Astrophys. J. 161, 811–820 (1970).

    Article  ADS  Google Scholar 

  34. W. Eissner, Computer Methods and Packages in Electron-Atom Collisions, in Physics of Electronic and Atomic Collisions, North-Holland, Amsterdam, 1972, pp. 460–478.

    Google Scholar 

  35. W. Eissner and M. J. Seaton, Computer programs for the calculation of electron-atom collision cross sections, J. Phys. B 5, 2187–2198 (1972).

    Article  ADS  Google Scholar 

  36. H. E. Saraph, Collision strengths from reactance matrices, Comput. Phys. Commun. 1, 232–240 (1970).

    Article  ADS  Google Scholar 

  37. M. Jones, Relativistic corrections to atomic energy levels, J. Phys. B 3, 1571–1592 (1970).

    Article  ADS  Google Scholar 

  38. W. Eissner, M. Jones, and H. Nussbaumer, Techniques for the calculation of atomic structures and radiative data including relativistic corrections, Comput. Phys. Commun. 8, 270–306 (1974).

    Article  ADS  Google Scholar 

  39. H. E. Saraph, Fine structure cross sections from reactance matrices, Comput. Phys. Commun. 3, 256–268 (1972).

    Article  ADS  Google Scholar 

  40. H. Nussbaumer, Forbidden transitions in the C I sequence, Astrophys. J. 166, 411–422 (1971).

    Article  ADS  Google Scholar 

  41. R. H. Garstang, Forbidden Transitions, in Atomic and Molecular Processes, D. R. Bates, Ed., Academic Press, New York, 1962, pp. 1–46.

    Google Scholar 

  42. R. H. Garstang, Theoretical and experimental forbidden atomic transition probabilities, Mém. Soc. R Sci. Liège Ser. 5 17, 35–44 (1969).

    Google Scholar 

  43. R. H. Garstang, Discussion on Transition Probabilities for Forbidden Lines, IAU Symposium 34 on Planetary Nebulae, D. E. Osterbrock and C. R. O’Dell, Eds., Reidel, Dordrecht, 1968, p. 151.(1959).

    Google Scholar 

  44. D. Layzer, On a screening theory of atomic spectra, Ann. Phys. (N.Y.) 8, 271–296 (1959).

    Article  MathSciNet  ADS  MATH  Google Scholar 

  45. H. Nussbaumer, Improved bound wave functions for complex atoms, J. Phys. B 5, 1837–1843 (1972).

    Article  ADS  Google Scholar 

  46. H. Nussbaumer and P. J. Storey, The C III transition probabilities, Astron. Astrophys. 64, 139–144 (1978).

    ADS  Google Scholar 

  47. A. W. Weiss, Superposition of configurations and atomic oscillator strengths—carbon I and II, Phys. Rev. 162, 71–80 (1967).

    Article  ADS  Google Scholar 

  48. C. Edmiston and M. Krauss, Pseudonatural orbitals as a basis for the superposition of configurations. I. He2 +, J. Chem. Phys. 45, 1833–1839 (1966).

    Article  ADS  Google Scholar 

  49. A. P. Jucys, On the Hartree-Fock method in multiconfiguration approximation, Adv. Chem. Phys. 14, 191–206 (1969).

    Article  Google Scholar 

  50. D. E. Osterbrock, Excitation of semiforbidden 2s 2 l S-2s2p 3 P° lines observed in quasars and nebulae, J. Phys. B 3, 149–160 (1970).

    Article  ADS  Google Scholar 

  51. D. E. Osterbrock, Excitation of C III] λ1909 and other semiforbidden lines in QSO’s and nebulae, Astrophys. J. 160, 25–30 (1970).

    Article  ADS  Google Scholar 

  52. D. E. Osterbrock, Forbidden emission lines in galaxies and quasars, Mém. Soc. R. Sci. Liège Ser. 5, 17, 391–403 (1969).

    Google Scholar 

  53. I. L. Beigman and L. A. Vainshtein, Effective cross sections for the exchange excitation of atoms and ions by electron impact, Sov. Phys. JETP 25, 119–123 (1967).

    ADS  Google Scholar 

  54. D. R. Flower, Collision strengths for elelctron excitation of highly ionized complex atoms, J. Phys. B 4, 697–705 (1971).

    Article  ADS  Google Scholar 

  55. D. R. Flower and G. Pineau des Forets, Excitation of the Fe xm spectrum in the solar corona, Astron. Astrophys. 24, 181–192 (1973).

    ADS  Google Scholar 

  56. M. Loulergue and H. Nussbaumer, Fe xvn emission from the solar corona, Astron. Astrophys. 24, 209–213 (1973).

    ADS  Google Scholar 

  57. M. Loulergue and H. Nussbaumer, A study of Fe xvn and Ni xix coronal lines, Astron. Astrophys. 45, 125–134 (1975).

    ADS  Google Scholar 

  58. H. Mason, The excitation of several iron and calcium lines in the visible spectrum of the solar corona, Mon. Not. R. Astron. Soc. 170, 651–689 (1975).

    ADS  Google Scholar 

  59. K. P. Dere, H. E. Mason, K. G. Widing, and A. K. Bhatia, XUV electron density diagnostics for solar flares, Astrophys. J. Suppl. Ser. 40, 341–364 (1979).

    Article  ADS  Google Scholar 

  60. H. E. Mason, G. A. Doschek, U. Feldman, and A. K. Bhatia, Fe XXI as an electron density diagnostic in solar flares, Astron. Astrophys. 73, 74–81 (1979).

    ADS  Google Scholar 

  61. W. Eissner and M. J. Seaton, Computer programs for the calcualtion of electron-atom collision cross sections I: General formulation, J. Phys. B 5, 2187–2198 (1972).

    Article  ADS  Google Scholar 

  62. M. J. Seaton and P. M. H. Wilson, A frozen cores approximation for atomic structure calculations, Phys. B 5, L1-L3 (1972).

    Article  ADS  Google Scholar 

  63. M. A. Crees, M. J. Seaton, and P. M. H. Wilson, IMPACT, a program for the solution of the coupled integro-differential equations of electron-atom collision theory, Comput. Phys. Commun. 15, 23–83 (1978).

    Article  ADS  Google Scholar 

  64. A. R. G. Jackson, Excitation of C II] λ2326 O m] XI664, and other semiforbidden emission lines in quasars, Mon. Not. R. Astron. Soc. 165, 53–60 (1973).

    ADS  Google Scholar 

  65. C. Jordan, “The Relative Intensities of Lines from Be I-like Ions in the Solar Spectrum,” Highlights in Astronomy, C. de Jager, Ed., Reidel, Dordrecht, 1971, pp. 519–526.

    Google Scholar 

  66. R. H. Munro, A. K. Dupree, and G. L. Withbroe, Electron densities derived from line itensity ratios: beryllium isoelectronic sequence, Solar Phys. 19, 347–355 (1971).

    Article  ADS  Google Scholar 

  67. M. Loulergue and H. Nussbaumer, The chromosphere-corona transition region as seen in C III, Astron. Astrophys. 34, 225–233 (1974).

    ADS  Google Scholar 

  68. M. Loulergue and H. Nussbaumer, The C III problem, Astron. Astrophys. 51, 163–170 (1976).

    ADS  Google Scholar 

  69. C. Jordan, The measurement of electron densities from beryllium-like ion line ratios, Astron. Astrophys. 34, 69–73 (1974).

    ADS  Google Scholar 

  70. A. K. Dupree, P. V. Foukal, and C. Jordan, Plasma diagnostic techniques in the ultraviolet: the C III density-sensitive lines in the sun, Astrophys. J. 209, 621–632 (1976).

    Article  ADS  Google Scholar 

  71. D. R. Flower and J. M. Launay, Electron collisional excitation of C+2, Astron. Astrophys. 29, 321–326 (1973).

    ADS  Google Scholar 

  72. M. D. Hershkowitz and M. J. Seaton, The calculation of resonances in electron-ion scattering using the distorted wave approximation, J. Phys. B 6, 1176–1187 (1973).

    Article  ADS  Google Scholar 

  73. H. P. Muhlethaler, and H. Nussbaumer, TTransition probabilities within 2s 2-2s2p-2p 2 in the Be i sequence, Astron. Astrophys. 48, 109–114 (1976).

    ADS  Google Scholar 

  74. P. G. Burke and W. D. Robb, “The R-Matrix Theory of Atomic Processes,” in Advances in Atomic and Molecular Physics, Vol. 11, D. R. Bates and B. Bederson, Eds., Academic, New York, 1975, pp. 143–214.

    Google Scholar 

  75. K. A. Berrington, P. G. Burke, P. L. Dufton, and A. E. Kingston, Electron collisional excitation of C hi and o v, J. Phys. B 10, 1465–1475 (1977).

    Article  ADS  Google Scholar 

  76. P. L. Dufton, K. A. Berrington, P. G. Burke, and A. E. Kingston, The interpretation of C III and O v emission line ratios in the sun, Astron. Astrophys. 62, 111–120 (1978).

    ADS  Google Scholar 

  77. A. Meyer and H. Nussbaumer, Formation of emission lines in a shock heated solar atmosphere, Astron. Astrophys. 57, 431–436 (1977).

    ADS  Google Scholar 

  78. J. C. Raymond and A. K. Dupree, C III density diagnostics in nonequilibrium plasmas, Astrophys. J. 222, 379–383 (1978).

    Article  ADS  Google Scholar 

  79. R. H. Garstang and L. J. Shamey, Intercombination line oscillator strengths in the helium and beryllium isoelectronic sequences, Astrophys. J. 148, 665–666 (1967).

    Article  ADS  Google Scholar 

  80. A. Burgess and M. J. Seaton, The ionization equilibrium for iron in the solar corona, Mon. Not. R. Astron. Soc. 127, 355–358 (1964).

    ADS  Google Scholar 

  81. P. J. Storey, Dielectronic recombination at nebular temperatures, Mon. Not. R. Astron. Soc. 195, 27P-31P (1981).

    ADS  Google Scholar 

  82. J. P. Harrington, J. H. Lutz, M. J. Seaton, and D. J. Stickland, Ultraviolet spectra of planetary nebulae I: The abundance of carbon in IC 418, Mon. Not. R. Astron. Soc. 191, 13–22 (1980).

    ADS  Google Scholar 

  83. S. Torres-Peimbert and M. Peimbert, Photoelectric photometry and physical conditions of planetary nebulae, Rev. Mex. Astron. Astrofis. 2, 181–207 (1977).

    ADS  Google Scholar 

  84. D. J. Stickland, C. J. Penn, M. J. Seaton, M. A. J. Snijders, P. J. Storey, and C. R. Kitchin, Ultraviolet Observations of Nova Cygni 1978, The First Year of IUE, A. J. Willis, Ed., University College London, 1979, pp. 63–77.

    Google Scholar 

  85. J. P. Harrington, J. H. Lutz, and M. J. Seaton, Ultraviolet spectra of planetary nebulae IV: The C III 2297 dielectronic recombination line and dust absorption in the C IV λ1549 resonance doublet, Mon. Not. R. Astron. Soc. 195, 21P-26P (1981).

    ADS  Google Scholar 

  86. D. R. Bates and H. S. W. Massey, The negative ions of atomic and molecular oxygen, Philos. Trans. R. Soc. Lond. Ser. A 239, 269–304 (1943).

    Article  ADS  Google Scholar 

  87. M. J. Seaton and P. J. Storey, “Dielectronic Recombination,” in Atomic Processes and Applications, P. G. Burke and B. L. Moisewitsch, Eds., North Holland, Amsterdam, 1976, pp. 134–197.

    Google Scholar 

  88. A. Burgess, Dielectronic recombination and the temperature of the solar corona, Astrophys. J. 139, 776–780 (1964).

    Article  ADS  Google Scholar 

  89. D. J. Stickland, C. J. Penn, M. J. Seaton, M. A. J. Snijders, and P. J. Storey, Nova Cygni 1978 I: The nebular phase, Mon. Not. R. Astron. Soc. 197, 107–138 (1981).

    ADS  Google Scholar 

  90. P. C. W. Davies and M. J. Seaton, Radiation damping in the optical continuum, J. Phys. B 2, 757–765 (1969).

    Article  ADS  Google Scholar 

  91. M. Jones, A method for calculating the algebra of matrix elements for photoionization and line radiation, Comput. Phys. Commun. 7, 353–367 (1974).

    Article  ADS  Google Scholar 

  92. H. Nussbaumer and P. J. Storey, Oscillator strengths for excited states of C2+, Astron. Astrophys., to be submitted.

    Google Scholar 

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Author information

Authors and Affiliations

  1. Institute of Astronomy, EHT Zentrum, CH 8092, Zürich, Switzerland

    H. Nussbaumer

  2. Department of Physics and Astronomy, University College London, Gower Street, WC1 E6BT, England

    P. J. Storey

Authors
  1. H. Nussbaumer
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  2. P. J. Storey
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Editor information

Editors and Affiliations

  1. The Queen’s University of Belfast, Belfast, Northern Ireland

    P. G. Burke

  2. Science and Engineering Research Council, Daresbury, England

    W. B. Eissner

  3. Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado, USA

    D. G. Hummer

  4. University of London, London, England

    I. C. Percival

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Nussbaumer, H., Storey, P.J. (1983). The University College Computer Package for the Calculation of Atomic data. In: Burke, P.G., Eissner, W.B., Hummer, D.G., Percival, I.C. (eds) Atoms in Astrophysics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3536-8_8

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