Hostname: page-component-6bf8c574d5-9f2xs Total loading time: 0 Render date: 2025-03-09T05:39:25.800Z Has data issue: false hasContentIssue false
  • English
  • Français

Solar Oscillations Observed in the Total Irradiance*

Published online by Cambridge University Press:  12 April 2016

M. Woodard  and
H. Hudson
M. Woodard
Affiliation:
University of California, San Diego
H. Hudson
Affiliation:
University of California, San Diego

Abstract

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 total solar irradiance measurements obtained by the active-cavity radiometer on board the Solar Maximum Mission have been analyzed for evidence of global oscillations. We find that the most energetic low-degree p-mode oscillations in the five-minute band have amplitudes of a few parts per million of the total irradiance, and we positively detect modes with l = 0, 1, and 2. The distribution in l differs from that of the velocity spectrum, with relatively more power at lower l values. The individual modes have narrow line widths, corresponding to values of Q greater than a few thousand, or lifetimes of at least a week. We do not detect the 160-min oscillation in the power spectrum, and place an upper limit of 5 parts per million (99.9% confidence) on its amplitude.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 66: Problems of Solar and Stellar Oscillations , 1983 , pp. 67 - 73
Copyright
Copyright © Reidel 1983

Footnotes

*

Proceedings of the 66th IAU Colloquium: Problems in Solar and Stellar Oscillations, held at the Crimean Astrophysical Observatory, U.S.S.R., 1–5 September, 1981.

References

Brookes, J.R., Isaakq, G.R., and van der Raay, H.B.: 1976, Nature 259, 92.Google Scholar
Christiansen-Dalsgaard, J. and Gough, D.O.: 1982, submitted to Astron. Astrophys.Google Scholar
Claverie, A., Isaak, G.R., McLeod, C.P., van der Raay, H.B., and Roca Cortesq, T.: 1979, Nature 282, 591.CrossRefGoogle Scholar
Claverie, A., Isaak, G.R., McLeod, C.P., van der Raay, H.B., and Roca Cortes, T.: 1981, Nature 293,443.Google Scholar
Deubner, F.-L.: 1975, Astron. Astrophys. 44, 371.Google Scholar
Gough, D.R.: 1980, in Hill, H.A. and Dziembowski, W.A. (eds.), Nonradial and Nonlinear Stellar Pulsation, Springer, p. 273.CrossRefGoogle Scholar
Grec, G., Fossat, E., and Pomerantz, M.: 1980, Nature 288, 541.Google Scholar
Hill, H.A., Stebbins, R.T., and Brown, T.M.: 1976, in Sanders, J.H. and Wapstra, A.H. (eds.), Proc. V International Conference on Atomic Masses and Fundamental Constants, Plenum, New York, p. 622.Google Scholar
Kotov, V.A., Severny, A.B., and Tsap, T.T.: 1978, Monthly Notices Roy. Astron. Soc. 183, 61.Google Scholar
Scherrer, P., Wilcox, J.M., Kotov, V.A., Severny, A.B., and Tsap, T.T.: 1979, Nature 277, 635.Google Scholar
Severny, A.B., Kotov, V.A., and Tsap, T.T.: 1976, Nature 259, 87.Google Scholar
Willson, R.C: 1979, J. Appl Opt. 18, 179.Google Scholar
Willson, R.C. and Hudson, H.S., 1981, Astrophys. J. 244, L185.Google Scholar
Willson, R.C, Gulkis, S., Janssen, M., Hudson, H.S., and Chapman, G.A.: 1981, Science 211, 700.CrossRefGoogle Scholar
Whitaker, W.A.: 1963, Astrophys. J. 137, 914.Google Scholar