Abstract
During the total solar eclipse of 11 June, 1983, an imaging dual-channel Fabry-Pérot interferometer was used to obtain line profiles simultaneously in the green λ5303 Å [Fe xiv] and the red λ6374 Å [Fe x] coronal lines at various positions in the corona. Extensive microdensitometry followed by multi-Gaussian curve-fitting analysis has resulted in the determination of coronal temperatures and velocity separations between different pockets of coronal gas in the line of sight over a large extent of the corona. Fewer high temperature zones are to be found in the corona of 1983 compared with our similar green-line measurements of the solar maximum corona of 1980. The data are consistent with a temperature maximum occurring at 1.2 R ⊙, as found at the 1980 eclipse, but our new data are insufficient to observe farther out than this radius and so determine the position of a maximum. The velocity field in the corona at the 1983 eclipse is less structured compared with that at the 1980 eclipse and is mainly confined to the zone 20–30km s−1.
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Chandrasekhar, T., Desai, J. N., and Angreji, P. D.: 1981, Appl. Opt. 20, 2172.
Chandrasekhar, T., Ashok, N. M., Pasachoff, Jay, M., and Sivaraman, K. R.: 1984, Appl. Opt. 23, 508.
Chandrasekhar, T., Ashok, N. M., Debiprasad, C., and Desai, J. N.: 1988, Opt. Eng. 27, 67–70.
Delone, A. B. and Makarova, E. A.: 1969, Solar Phys. 9, 116.
Desai, J. N. and Chandrasekhar, T.: 1983, J. Astrophys. Astron. India 4, 65.
Fisher, R. R., Bauer, T., and Lacey, L.: 1983, photograph, High Altitude Observatory of the National Center for Atmospheric Research; 1989: printed in Pasachoff, Jay M., Contemporary Astronomy, 4th ed., Philadelphia, Saunders College Publishing, p. 136.
Jordan, C.: 1969, Monthly Notices Roy. Astron. Soc. 142, 501.
Livingston, W. C. and Harvey, J. W.: 1982, Proc. Indian Nat. Acad., Suppl. No. 3, p. 18.
Loucif, M. L., and Koutchmy, S.: 1989, Astron. Astrophys. Suppl. Ser. 77, 45.
Sime, D. G., Fisher, R. R., McCabe, M. K., and Mickey, D. L.: 1984, Astrophys. J. 278, L123.
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Chandrasekhar, T., Desai, J.N., Ashok, N.M. et al. Fabry-Pérot line profiles in the λ5303 å and λ6374 å coronal lines obtained during the 1983 Indonesian eclipse. Sol Phys 131, 25–39 (1991). https://doi.org/10.1007/BF00151741
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DOI: https://doi.org/10.1007/BF00151741