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Theoretical Understanding of Chromospheric Inhomogeneities

Published online by Cambridge University Press:  06 September 2019

Philippe Delache
Philippe Delache*
Affiliation:
Observatoire de Nice

Extract

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“By assuming that the atmosphere is

homogeneous at each depth, we are

immeasurably adding to the numerical

tractability of the problem at the

expense of ignoring 80 years' worth

of data on chromospheric inhomogeneities”

Linsky and Avrett (1970)

To the spatial inhomogeneity, Linsky and Avrett could have added the variations with time which are also well known, well observed characteristics of the solar chromosphere. Let me quote also Praderie (1969): large asymmetries are observed in stellar K2 components which vary with time, “so that it seems difficult to think of any interpretation of the K line profile that would ignore motions and inhomogeneities in the atmosphere of those stars” And let me borrow a conclusion from Thomas (1969): “So what we need are ingenious ideas for empirical inference; or theoretical generalization from experience with the solar case” I wonder if the solar experience is sufficient at the present time to permit any theoretical generalization, as has been the case for the solar wind. In order to simplify, I shall restrict the scope of this contribution to the quiet solar chromosphere, and focus only on spicules.

Type
Part III: Mechanical heating and its Effect on the Chromospheric Energy Balance
Information
International Astronomical Union Colloquium , Volume 19: Stellar Chromospheres , February 1973 , pp. 207 - 218
Copyright
Copyright © Nasa 1972

References

Athay, R.G.: 1966 Astrophys. J. 146, 223.Google Scholar
Athay, R.G. : 1972 preprintGoogle Scholar
Athay, R.G. and Skumanich, A. : 1971 Astrophys. J. 170, 605.Google Scholar
Avrett, E.H. and Hummer, D.G. : 1965 M.N.R.A.S. 130, 295.Google Scholar
Bappu, M.K.V and Sivaraman, K.R. : 1971 Solar Phys. 17, 316.Google Scholar
Beckers, J.M. : 1968 Solar Phys. 3, 367 Google Scholar
Cess, R.D. : 1972 Astr. and Astrophys. 16, 327.Google Scholar
Chapman, S. : 1959, Proc. Roy. Soc. London A 253, 462.Google Scholar
Chiuderi, C., Chiuderi Drago, F and Noci, G. : 1971 Solar Physics 17, 369.Google Scholar
Defouw, R.J. : 1970a Solar Physics 14, 42.Google Scholar
Defouw, R.J. : 1970b Astrophys. J. 161, 55.Google Scholar
Delache, Ph. : 1969 in” Chromosphere-Corona Transition Region NCAR Publication, Boulder, Colorado.Google Scholar
Delache, Ph. : 1972 preprint.Google Scholar
Delache, Ph. and Froeschle, C. : 1972 Astron. and Astrophys. 16 348.Google Scholar
Finn, G.D. and Jefferies, J.T. : 1968 J.Q.S.R.T. 8, 1675.Google Scholar
Finn, G.D. : 1971 J.Q.S.R.T. 11, 477 Google Scholar
Finn, G.D. : 1972 J.Q.S.R.T. 12, 149.Google Scholar
Frisch, H. : 1970 Astron. and Astrophys. 9, 269.Google Scholar
Frisch, H. : 1971 Astron. and Astrophys. 13, 359.Google Scholar
Frisch, H. : 1972 Solar Physics, to be published.Google Scholar
Jefferies, J.T. : 1960 Astrophys. J. 132, 775.Google Scholar
Krat, V A. and Krat, T.V : 1971 Solar Physics 17, 355.Google Scholar
Kuperus, M. and Athay, R.G. : 1967 Solar Physics 1, 361.Google Scholar
Lantos, P. : 1971 Ph. D. Thesis Paris University.Google Scholar
Le Guet, F : 1972 Astron. and Astrophys. 16, 356.Google Scholar
Linsky, J.L. and Avrett, E.H. : 1970 Publ. Astron. Soc. Pac. 82, 169.Google Scholar
Mihalas, D. : 1970 Stellar Atmospheres, Freeman & Co. Google Scholar
Parker, E.N. : 1965 Space Sci. Reviews 4, 666.Google Scholar
Pikel'ner, S.B. : 1971 Comments on Astrophys. 3, 33.Google Scholar
Pottasch, S.R. : 1964 Space Sci. Reviews 3, 816.Google Scholar
Praderie, F. : 1969 I.A.U. Colloquium n°2, Commission n°36 N.B.S. Pub. 332 p. 241.Google Scholar
Rybicki, G.B. : 1971 preprintGoogle Scholar
Souffrin, P. : 1971 Theory of the Stellar Atmospheres Ed. Observatoire de Geneve SuisseGoogle Scholar
Thomas, R.N. and Athay, R.G. : 1961 Physics of the Solar Chromosphere Interscience, New York.Google Scholar
Thomas, R.N. : 1969 I.A.U. Coloquium n°2, Commission n°36 N.B.S. Pub. 332 p. 259.Google Scholar
Withbroe, G.L. : 1971 Solar Physics 18, 458 Google Scholar
Zirin, H. and Dietz, R. : 1963 Astrophys. J. 138, 664 Google Scholar
Zirker, J.B. : 1971 The Menzel Symposium, Ed. Gebbier, K.B., N.B.S. Pub. 353 p. 112 Google Scholar