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Temperature Distribution in a Stellar Atmosphere-Diagnostic Basis

Published online by Cambridge University Press:  06 September 2019

John T. Jefferies  and
Nancy D. Morrison
John T. Jefferies
Affiliation:
Institute for Astronomy
Nancy D. Morrison
Affiliation:
University of Hawaii

Extract

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As is well known, the word “chromosphere” was coined to denote the bright, thin, colored ring seen as the solar limb was obscured by the Moon at the time of a total eclipse. This region of the Sun's atmosphere was found to be the source of many strong emission lines — the flash spectrum — some persisting to such heights as to leave no doubt that their cores originated quite high in the chromosphere. The presence of such an emission line region is not unexpected; however, what gives the solar chromosphere special interest is the fact that its observed spectroscopic properties cannot be explained on the basis that it is a simple extension of a “classical” atmosphere for which radiative, hydrostatic, and local thermodynamic equilibrium all apply Thus, the height above the limb to which most eclipse lines persist is inconsistent with the predicted density scale height.

Type
Part I: Spectroscopic Diagnostics of Chromospheres and the Chromospheric Energy Balance
Information
International Astronomical Union Colloquium , Volume 19: Stellar Chromospheres , February 1973 , pp. 1 - 24
Copyright
Copyright © Nasa 1972

References

Allen, C.W., 1963, Astrophysical Quantities, 2nd. ed., (The Athlone Press, London).Google Scholar
Athay, R.G., Avrett, E.H., Beebe, H.A., Johnson, H.R., Poland, A.I., and Cuny, Y., 1968, Resonance Lines in Astrophysics NCAR, Boulder, Colo., p. 169.Google Scholar
Avrett, E.H., 1966, Ap. J. 144, 59.Google Scholar
Boesgaard, A.M., 1972 (This Symposium).Google Scholar
Cuny, Y., 1968, Solar Phys. 3, 204.Google Scholar
Curtis, G.W. and Jefferies, J.T., 1967, Ap. J. 150, 1961.Google Scholar
de Jager, C. and Neven, L. 1967, Solar Phys. 1, 27.Google Scholar
Deutsch, A.J., 1970, IAU Symposium No. 36, eds. Houziaux, and Butler, (Springer-Verlag, New York), p. 199.Google Scholar
Doherty, L.R. 1970, paper presented at the meeting on Solar Studies With Special Reference to Space Observations held at the Royal Society, London, Apr. 21-22, 1970.Google Scholar
Finn, G.D., and Jefferies, J.T., 1968 a J. Quant. Spectrosc. Radiat. Transfer 8, 1675.Google Scholar
Finn, G.D., and Jefferies, J.T., 1968b ibid, 8, 1705.Google Scholar
Finn, G.D., and Jefferies, J.T., 1969 ibid, 9, 469.Google Scholar
Gebbie, K.B. and Thomas, R.N., 1968, Ap. J. 154, 285.Google Scholar
Geltman, S., 1965, Ap. J. 141, 376.Google Scholar
Harrington, J.P., 1970, Ap. J., 162, 913.Google Scholar
Hummer, D.G., 1969, Mon. Not. R. Astr. Soc. 145, 95.Google Scholar
Hummer, D.G., and Rybicki, G.B., 1971a, Ann. Rev. Astron. Ap. 9, 237.Google Scholar
Hummer, D.G., and Rybicki, G.B., 1971b Mon. Not. R. Astr. Soc. 152, 1.Google Scholar
Jefferies, J.T., 1968, Spectral Line Formation, (Blaisdell Pub. Co. Waltham, Mass).Google Scholar
Jefferies, J.T., Orrall, F.Q. and Zirker, J.B., 1972, Solar Phys. (in press)Google Scholar
Jefferies, J.T. and Thomas, R.N., 1959, Ap. J. 129, 401.Google Scholar
Jefferies, J.T. and White, O.R., 1967, Ap. J. 150, 1051.Google Scholar
Kellermann, K.I. and Pauliny-Toth, I.I.K., 1966, Ap. J. 145, 953.Google Scholar
Noyes, R. W., Gingerich, O., and Goldberg, L., 1966, Ap. J. 145, 344.Google Scholar
Schuster, A., 1905, Ap. J. 21, 1.Google Scholar
Seaquist, E.R., 1967, Ap. J. 148, 123.Google Scholar
Spinrad, H. and Wing, R.F., 1969, Ann. Rev. Astron. Astrophys. 7 249.Google Scholar
Spitzer, L., 1939, Ap. J. 90, 494.Google Scholar
Stromgren, B., 1935, Z. Astrophys 10, 237.Google Scholar
Thomas, R.N., 1957, Ap. J. 125, 260.Google Scholar
Underhill, A.B., 1949, Ap. J., 110, 340.Google Scholar
Vaughan, A.H. and Zirin, H., 1968, Ap. J. 152, 123.Google Scholar
Waddell, J.H., 1962, Ap. J. 136, 231.Google Scholar
Wallerstein, G., 1971, Ap. J. 166, 725.Google Scholar
Warner, B. 1968, Observatory 88, 217.Google Scholar
Weymann, R., 1962, Ap. J. 136, 844.Google Scholar
Weymann, R. and Chapman, G., 1965, Ap. J. 142, 1268.Google Scholar
Wilson, A.M. and Worrall, G., 1969, Astr. Astrophys. 2, 469.Google Scholar
Wilson, O.C. 1961, Stellar Atmospheres, ed. Greenstein, , vol. 6, Stars and Stellar Systems (Chicago U of Chicago Press), p. 436.Google Scholar
Wilson, O.C. and Abt, H., 1954, Ap. J. Suppl. 1, 1.Google Scholar
Wright, K.O., 1959, Publ. Dominion Astrophys. Obs. 11, 77 Google Scholar
Wright, K.O., 1970, Vistas in Astronomy 12, 147.Google Scholar