Abstract
The three helioseismology instruments aboard SOHO observe solar p modes in velocity (GOLF and MDI) and in intensity (VIRGO and MDI). Time series of two months duration are compared and confirm that the instruments indeed observe the same Sun to a high degree of precision. Power spectra of 108 days are compared showing systematic differences between mode frequencies measured in intensity and in velocity. Data coverage exceeds 97% for all the instruments during this interval. The weighted mean differences (V-I) are −0.1 µHz for l=0, and −0.16 µHz for l=1. The source of this systematic difference may be due to an asymmetry effect that is stronger for modes seen in intensity. Wavelet analysis is also used to compare the shape of the forcing functions. In these data sets nearly all of the variations in mode amplitude are of solar origin. Some implications for structure inversions are discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Appourchaux, T., Andersen, B. N., Fröhlich, C., Jiménez, A., Telljohann, U., and Wehrli, C.: 1997, Solar Phys. 170, 27.
Appourchaux, T., Sekii, T., Gough, D. O., Lee, U., Wehrli, C., and the VIRGO team: 1996, in in F.-X. Schmider and J. Provost (eds), ‘Structure Inversion with the VIRGO Data’, IAU Colloq. 181, in press.
Anderson, E. R., Duvall, T. L., Jr., and Jefferies, S. M.: 1990, Astrophys. J. 364, 699.
Baudin, F., Gabriel, A. H., and Gibert, D.: 1994, Astron. Astrophys. 285, L29.
Baudin, F., Gabriel, A. H., Gibert, D., Pallé, P. L., and Régulo, C.: 1996, Astron. Astrophys. 311, 1024.
Duvall, T. L., Jr., Jefferies, S. M., Harvey, J. W., Osaki, Y., and Pomerantz, M. A.: 1993, Astrophys. J. 410, 829.
Fröhlich, C., Romero, J., Roth, H., Wehrli, C., Andersen, B. N., Appourchaux, T., Domingo, V., Telljohann, U., Berthomieu, G., Delache, P., Provost, J., Toutain, T., Crommelynck, D., Chevalier, A., Fichot, A., Däppen, W., Gough, D. O., Hoeksema, T., Jiménez, A., Gómez, M., Herreros, J., RocaCortés, T., Jones, A. R., Pap, J., and Willson, R. C.: 1995, Solar Phys. 162, 101.
Fröhlich, C., Andersen, B. N., Appourchaux, T., Berthomieu, G., Crommelynck, D., Domingo, V., Fichot, A., Finsterle, W., Gómez, M. F., Gough, D. O., Jiménez, A., Leifsen, T., Lombaerts, M., Pap, J., Provost, J., RocaCortés, T., Romero, J., Roth, H., Sekii, T., Telljohann, U., Toutain, T., and Wehrli, C.: 1997, Solar Phys. 170, 1.
Gabriel, A. H., Grec, G., Charra, J., Robillot, J. M., Roca Cortés, T., Turck-Chièze, S., Bocchia, R., Boumier, P., Cantin, M., Cespédes, E., Cougrand, B., Crétolle, J., Damé, L., Decaudin, M., Delache, P., Denis, N., Duc, R., Dzitko, H., Fossat, E., Fourmond, J. J., García, R. A., Gough, D. O., Grivel, C., Herreros, J. M., Lagardère, H., Moalic, J. P., Pallé, P. L., Pétrou, N., Sanchez, M., Ulrich, R., and Van der Raay, H. B.: 1995, Solar Phys. 162, 61.
Gabriel, A. H., Charra, J., Grec, G., Robillot, J. M., Roca Cortés, T., Turck-Chièze, S., Ulrich, R., Basu, S., Baudin, F., Bertello, L., Boumier, P., Charra, M., Christensen-Dalsgaard, J., Decaudin, M., Dzitko, H., Foglizzo, E., Fossat, E., García, R. A., Herreros, J. M., Lazrek, M., Pétrou, N., Renaud, C., and Régulo, C.: 1997, Solar Phys. 175, 207 (this issue).
Gabriel, M.: 1994, Astron. Astrophys. 287, 685.
Garcia, R., Foglizzo, T., Turck-Chièze, S., Baudin, F., Boumier, P., and the GOLF Team: 1996, in F.-X. Schmider and J. Provost (eds), ‘Time Evolution of p Modes in the GOLF Data’, IAU Colloq. 181, in press.
Kosovichev, A. G., Schou, J., Scherrer, P. H., Bogart, R. S., Bush, R. I., Hoeksema, J. T., Aloise, J., Bacon, L., Burnette, A., DeForest, C., Giles, P. M., Leibrand, K., Nigam, R., Rubin, M., Scott, K., Williams, S. D., Basu, S., Christensen-Dalsgaard, J., Däppen, W., Rhodes, E. J., Jr., Duvall, T. L., Jr., Howe, R., Thompson, M. J., Gough, D. O., Sekii, T., Toomre, J., Tarbell, T. D., Title, A. M., Mathur, D., Morrison, M., Saba, J. L. R., Wolfson, C. J., Zayer, I., and Milford, P. N.: 1997, Solar Phys. 170, in press.
Lazrek, M., Baudin, F., Bertello, L., Boumier, P., Charra, J., Fierry-Fraillon, D., Fossat, E., Gabriel, A. H., García, R. A., Gelly, B., Gouiffes, C., Grec, G., Pallé, P. L., Peréz Hernandez, F., Régulo, C., Renaud, C., Robillot, J. M., Roca Cortés, T., Turck-Chièze, S., and Ulrich, R.: 1997, Solar Phys. 175, 227 (this issue).
Leifsen T., Hanssen, A., Andersen, B. N., and Toutain, T.: 1995, in R. Ulrich, E. J. Rhodes, Jr., and W. Däppen (eds), ‘Wavelet Analysis of IPHIR Data’, Helio-and Astero-Seismology from the Earth and Space, ASP Conf. Series 76, p. 520.
Nigam, R., Kosovichev, A. G., and Scherrer, P. H.: 1996, in F.-X. Schmider and J. Provost (eds), ‘Study of Line Asymmetries of Solar Oscillations Above and Below the Acoustic Cut-Off Frequency’, IAU Colloq. 181, in press.
Régulo, C., Roca Cortés, T., Boumier, P., Robillot, J. M., García, R. A., Turck-Chièze, S., Ulrich, R. K., and the GOLF Team: 1996, in F.-X. Schmider and J. Provost (eds), ‘Velocity and/or Intensity Signal in the GOLF One Wing Signal?’, IAU Colloq. 181, in press.
Scherrer, P. H., Bogart, R. S., Bush, R. I., Hoeksema, J. T., Kosovichev, A. G., Schou, J., Rosenberg, W., Springer, L., Tarbell, T. D., Title, A., Wolfson, C. J., Zayer, I., and the MDI Engineering Team: 1995, Solar Phys. 162, 129.
Scherrer, P. H. and the MDI Team: 1997, Solar Phys., submitted.
Toutain, T. and Fröhlich, C.: 1992, Astron. Astrophys. 257, 287.
Ulrich, R.: 1991, Adv. Space Res. 11, 217.
Woodard, M.: 1984, Short-Period Oscillations in the Total Solar Irradiance, Ph.D. thesis, University of California, San Diego,, California.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Toutain, T., Appourchaux, T., Baudin, F. et al. Tri-Phonic Helioseismology: Comparison of Solar p Modes Observed by the Helioseismology Instruments Aboard SOHO. Sol Phys 175, 311–328 (1997). https://doi.org/10.1023/A:1004949832159
Issue Date:
DOI: https://doi.org/10.1023/A:1004949832159