Abstract
A non-LTE formulation is given for the transfer of radiation in the autoionizing lines of neutral aluminum at λ1932 and λ1936 through both the Bilderberg and Harvard-Smithsonian model atmospheres. Numerical solutions for the common source function of these lines and their theoretical line profiles are calculated and compared with the corresponding LTE profiles. Our results show that the non-LTE profiles provide a better match with the observations. They also indicate that the continuous opacity of the standard solar models should be increased in this wavelength region if the center-limb variations of observed and theoretical profiles of these lines are to be in reasonable agreement.
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References
Allen, C. W.: 1963, Astrophyslcal Quantities, Athlone Press, p. 90.
Aller, L. H.: 1963, The Atmosphere of the Sun and Stars, Ronald Press Company, p. 118.
Bonnet, R. M. and Blamont, J. E.: 1968, Solar Phys. 3, 64.
Bonnet, R. M., Blamont, J. E., and Gildwarg, P.: 1967, Astrophys. J. (Letters) 148, L115.
Burgess, A. and Seaton, M. J.: 1959, Monthly Notices Roy. Astron. Soc. 120, 121.
Fano, U. and Cooper, J. W.: 1965, Phys. Rev. 137, A1364.
Finn, G. D. and Jefferies, J. T.: 1968, J. Quant. Spectrosc. Radiat. Transfer 8, 1675.
Finn, G. D. and Jefferies, J. T.: 1969, J. Quant. Spectrosc. Radiat. Transfer 9, 469.
Garton, W. R. S., Parkinson, W. H., and Reeves, E. M.: 1964, Astrophys. J. 140, 1269.
Gingerich, O. and de Jager, C.: 1968, Solar Phys. 3, 5.
Gingerich, O., Noyes, R. W., Kalkofen, W., and Cuny, Y.: 1971, Solar Phys. 18, 347.
Heintze, J. R. W., Hubenet, H., and de Jager, C.: 1964, Bull. Astron. Inst. Neth. 17, 442.
Jefferies, J. T.: 1968, Spectral Line Formation, Blaisdell Publ. Co.
Kohl, J. L. and Parkinson, W. H.: 1973, private communication.
Lambert, L. and Warner, B.: 1968, Monthly Notices Roy. Astron. Soc. 138, 181.
McAllister, H. C.: 1960, A Preliminary Photometric Atlas of the Solar Ultraviolet Spectrum from 1800 to 2965 Angstroms, Univ. of Colorado Printing Services, Boulder.
McAllister, H. C.: 1974, Solar Phys., in press.
Müller, E. A. and Mutschlecner, J. P.: 1964, Astrophys. J. Suppl. 9, 1.
Noyes, R. W.: 1971, Ann. Rev. Astron. Astrophys. 9, 209.
Simon, M. and Zirin, H.: 1969, Solar Phys. 9, 317.
Tousey, R.: 1963, Space Sci. Rev. 2, 3.
van Regemorter, H.: 1962, Astrophys. J. 136, 906.
Vernazza, J. E. and Noyes, R. W.: 1972, Solar Phys. 22, 358.
Withbroe, G. L.: 1966, Astrophys. J. 146, 294.
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Finn, G.D., Jefferies, J.T. Non-LTE profiles of the Ali autoionization lines. Sol Phys 34, 57–75 (1974). https://doi.org/10.1007/BF00149599
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DOI: https://doi.org/10.1007/BF00149599