The SOI-MDI high-latitude jet: the evidence for and against

Howe, R. ; Antia, H. M. ; Basu, S. ; Christensen-Dalsgaard, J. ; Korzennik, S. G. ; Schou, J. ; Thompson, M. J. (1998) The SOI-MDI high-latitude jet: the evidence for and against Proceedings of SOHO 6/GONG 98 Workshop on Structure and Dynamics of the Interior of the Sun and Sun-like Stars . pp. 803-808.

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The apparent detection of a prograde jet at latitude 75° and at a radius of about 0.95R in some inversions of rotation data from SOI--MDI (Schou et al., 1998) has excited considerable interest, but whether the jet really exists in the solar interior is certainly not yet firmly established. The detection of the feature is sensitive both to the inversion techniques used and to the methods of mode parameter estimation used to generate the input data. In particular, the feature is much more apparent in Regularized Least-Squares inversions than in inversions using an Optimally Localized Average approach, and is not detected at all in the present GONG data when analysed with the GONG peakfinding algorithm, or indeed in SOI data when analysed with the GONG algorithm. Therefore in this poster we examine critically the current evidence for the source and existence of this jet in the light of forward and inverse analyses.

Item Type:Article
Source:Copyright of this article belongs to European Space Agency.
Keywords:Sun: Interior; Sun: Oscillations; Sun: Rotation
ID Code:75653
Deposited On:24 Dec 2011 15:06
Last Modified:18 May 2016 19:36

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