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Mode Parameters Analysis


  • Inputs: HMI Dopplergrams

  • Outputs: P-mode parameters (frequencies...) as a function of mode degree l and order n

  • Problem: Measure p-mode parameters (frequency, linewidth,...) as accurately as possible

Literature Search

  • MDI Medium-l code:

Title : A comparison of solar p-mode parameters from the Michelson Doppler imager and the global oscillation network group : splitting coefficients and rotation inversions" Schou, J. et al., 2002, ApJ 567, p1234-1249

  • MDI High-l code:

Title : A new method for measuring frequencies and splittings of high-degree modes
Reiter, Johann; Rhodes, E. J., Jr.; Kosovichev, A. G.; Schou, J.; Scherrer, P.H.,
Proceedings of the SOHO 11 Symposium on From Solar Min to Max: Half a Solar Cycle with SOHO, 11-15 March 2002, Davos, Switzerland. A symposium dedicated to Roger M. Bonnet. Edited by A. Wilson, ESA SP-508, Noordwijk: ESA Publications Division, ISBN 92-9092-818-2, 2002, p. 91 - 94

Title : Accurate measurements of SOI/MDI high-degree frequencies and frequency splittings
Reiter, J.; Kosovichev, A. G.; Rhodes, E. J., Jr.; Schou, J.,
Proceedings of SOHO 12 / GONG+ 2002. Local and global helioseismology: the present and future, 27 October - 1 November 2002, Big Bear Lake, CA, USA. Edited by H. Sawaya-Lacoste, ESA SP-517, Noordwijk, Netherlands: ESA Publications Division, ISBN 92-9092-827-1, 2003, p. 369 - 372

* Algorithms:

Title : The art of fitting p-mode spectra. I. Maximum likelihood estimation
Appourchaux, T.; Gizon, L.; Rabello-Soares, M.-C
1998, Astronomy and Astrophysics Supplement, v.132, p.107-119

Title : The art of fitting p-mode spectra. II. Leakage and noise covariance matrices
Appourchaux, T.; Rabello-Soares, M.-C.; Gizon, L.
1998, Astronomy and Astrophysics Supplement, v.132, p.121-132

Title : Generation of artificial helioseismic time-series
Schou, J.; Brown, T. M.
1994, Astron. Astrophys. Suppl. 107, 541-550

Routines and Libraries

Test Data

Artificial Dopplergrams including low-degree and medium-degree modes


-- ElizabethAuden - 11 Jan 2005

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Topic revision: r6 - 2005-09-23 - ElizabethAuden
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