Hostname: page-component-8448b6f56d-qsmjn Total loading time: 0 Render date: 2024-04-24T02:34:05.579Z Has data issue: false hasContentIssue false
  • English
  • Français

A Summary of the Joint Discussion at Patras on Solar Luminosity Variations

Published online by Cambridge University Press:  30 March 2016

J. Eddy  and
P. Foukal

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The most interesting result in solar luminosity studies in the past decade has been the detection of significant variations in the total irradiance by precision radiometers on the NIMBUS-7 and SMM spacecraft. A substantial fraction of the observed variation can be attributed to sunspot blocking. Thermal storage models indicate that the blocked flux can be stored in a slight increase of the thermal and potential energy of the convective zone. The thermal storage time is likely to far exceed one solar activity cycle, implying an 11-year modulation of the solar constant at a level of about 0.1%. Direct observations of the 11-year or longer variations are more difficult but there is some evidence for secular trends below about 0.4% amplitude over the 14-year period of modern sampling. Ongoing stellar photometric programs suggest that luminosity changes exceeding 1% may have been detected in young, chromospherically active stars.

H. S. Hudson (University of California, San Diego) reviewed observations of short-term solar irradiance variations from spacecraft, commenting principally on the precision measurements of the solar constant (S) made by the Active Cavity Radiometer (ACRIM) on the Solar Maximum Mission (SMM) spacecraft (Willson et al., 1981).

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 6 , 1983 , pp. 75 - 94
Copyright
Copyright © Reidel 1983

References

Biermann, L.: 1941, Vierteljahrsch Astr. Gesselsch 76, p. 194.Google Scholar
Beckers, J.: 1981, private communication.Google Scholar
Brown, T.: 1981, Bull. Amer. Astron. Soc. 13, p. 878.Google Scholar
Canuto, V., and Hsieh, H.: 1980, Astrophys. Journ. 237, p. 613.Google Scholar
Currie, R.: 1981, J. Atmos. Sci. 38, p. 808.Google Scholar
Dearborn, D., and Blake, J.: 1982, Astrophys. Journ. 257, p. 896.Google Scholar
Dilke, F., and Gough, D.: 1972, Nature 240, p. 262.Google Scholar
Dravins, D., Lindegren, L., and Nordlund, A.: 1981, Astron. Astrophys. 96, p. 345.Google Scholar
Duvall, T., and Jones, H.: 1981, in “Solar Instrumentation: What’s Next,” Sacramento Peak Observatory Publication, Dunn, R., ed.Google Scholar
Eddy, J., Gilllland, R., and Hoyt, D.: 1982, Nature, in press.Google Scholar
Fiala, A., Herald, D., and Dunham, D.: 1981, Amer. Astron. Soc. 13, p. 552.Google Scholar
Foukal, P.: 1981, in The Physics of Sunspots, Sacramento Peak Observatory Publication, Cram, L. and Thomas, J., eds., p. 391.Google Scholar
Foukal, P., Mack, P., and Vernazza, J.: 1977, Astrophys. Journ. 215, p. 952.Google Scholar
Foukal, P., and Vernazza, J.: 1979, Astrophys. Journ. 234, p. 707.Google Scholar
Foukal, P., Fowler, L., and Livshits, M.: 1982, Astrophys. Journ., in press.Google Scholar
Gilliland, R.: 1981, Astrophys. Journ. 248, p. 1144.Google Scholar
Gilman, P.: 1978, Geophys. Astrophys. Fluid Dynamics 11, p. 157.Google Scholar
Hickey, J., Griffin, F., Jacobowitz, H., Stowe, L., Pellegrino, P., and Maschhoff, R.: 1980, EOS 61, p. 355.Google Scholar
Hoyle, F., and Lyttleton, R. : 1939, Proc. Camb. Phil. Soc. 35, p. 405.Google Scholar
Hoyt, D., and Eddy, J.: 1982, NCAR Technical Note TN-194 + STR.Google Scholar
Hudson, H., and Willson, R.: 1981, in The Physics of Sunspots, Sacramento Peak Observatory Publication, Cram, L. and Thomas, J., eds., p. 434.Google Scholar
Hudson, H., Silva, S., Woodard, M., and Willson, R.: 1982, Solar Phys. 76, p. 211.Google Scholar
Jerzykiewicz, M., and Serkowski, K.: 1966, Lowell Obs. Bull. 6, p. 295.Google Scholar
Keil, S.: 1981, private communication.Google Scholar
LaBonte, B., and Howard, R.: 1981, Science 214, p. 907.Google Scholar
Lean, J., White, O., Livingston, W., Heath, D., Donnelly, R., and Skumanich, A.: 1982, in preparation.Google Scholar
Livingston, W.C.: 1982, Nature 297, p. 208.CrossRefGoogle Scholar
Livingston, W. and Holweger, H.: 1982, Astrophys. Journ. 252, p. 375.Google Scholar
Maeder, A.: 1977, Astron. Astrophys. 56, p. 359.Google Scholar
Mavridis, L., Asteriadis, G., and Mahmoud, F.: 1982, in Compendium in Astronomy (ed. by Mariolopoulas, E., Theocaris, P. and Mavridis, L.), Reidel, D., Holland, , p. 253.Google Scholar
Newman, M., and Rood, R.: 1977, Science 198, p. 1035.Google Scholar
North, G., Cahalan, R., and Coakley, J.: 1981, Revs. Geophys. Space Phys. 19, p. 91.Google Scholar
Oranje, B.: 1982, Astron. Astrophys., in press.Google Scholar
Oster, L., Schatten, K., and Sofia, S.: 1982, Astrophys. Journ. 256, p. 768.Google Scholar
Owen, T., Cess, R., and Ramanathan, V.: 1979, Nature 277, p. 640.Google Scholar
Parker, E.: 1974, Solar Phys. 36, p. 249.Google Scholar
Parkinson, J., Morrison, L., and Stephenson, F.: 1980, Nature 288, p. 548.Google Scholar
Rosen, W., Foukal, P., Kurucz, R., and Pierce, A.: 1982, Astrophys. Journ. Letters 253, p. 89.Google Scholar
Skumanich, A., Lean, J.L., White, R.R., and Livingston, W.C.: 1982, in preparation.Google Scholar
Sofia, S.: 1981, in Variations of the Solar Constant, Sofia, S. ed., NASA Conf. Publ. 2191, p. 73–79.Google Scholar
Sofia, S., Dunham, D., and Fiala, A.: 1980, in Proc. Conf. on the Ancient Sun,” Pepin, R. et al., eds., Pergamon Press, NY, pp. 147–157.Google Scholar
Spiegel, E., and Weiss, N.: 1980, Nature 287, p. 616.Google Scholar
Spruit, H.: 1981, in The Physics of Sunspots, Sacramento Peak Observatory Publication, Cram, L. and Thomas, J., eds., p. 480.Google Scholar
Spruit, H.: 1982a, Astron. Astrophys. 108, p. 348.Google Scholar
Spruit, H.: 1982b, Astron. Astrophys. 108, p. 356.Google Scholar
Stimets, R., and Londono, C. : 1982, Solar Phys. 76, p. 167.Google Scholar
White, O.R., and Livingston, W.C.: 1981, Astrophys. Journ. 249, pp. 498–816.Google Scholar
Willson, R., Gulkis, S., Johnson, J., Hudson, H., and Chapman, G.: 1980, Science 211, p. 700.Google Scholar
Wilson, O.: 1978, Astrophys. Journ. 226, p. 379.Google Scholar