Abstract
The aim of the present work is the detection of solar g-modes, by means of a new observational strategy based on the exploitation of their spatial and temporal properties. The basic data, obtained at the Observatorio del Teide in 1993, consists of daily solar velocity measurements taken continuously and sequentially at six different and symmetric positions on the solar disk. By correlating the time series resulting from the reduction process, from different solar disk positions and considering the geometrical properties of different modes (l,m) on the Sun's surface, some of these can be selectively eliminated or enhanced. Moreover, the main spectral features present in the resulting power spectra must have precise phase relations if they correspond to global solar g-modes. The severe constraints established by the above properties have been applied to the best observed series (summer 1993). As a result, a discrete series of peaks have been selected that fulfill all the imposed conditions and which can therefore be interpreted as being of solar origin.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Allen, C. W.: 1976, Astrophysical Quantities, Athlone Press, 3rd ed., p. 171.
Brookes, J. R., Isaak, G. R., and van der Raay, H. B.: 1976, Nature 259, 92.
Brookes, J. R., Isaak, G. R., and van der Raay, H. B.: 1978, Monthly Notices Roy. Astron. Soc. 185, 1.
Christensen-Dalsgaard, J.: 1989, Monthly Notices Roy. Astron. Soc. 239, 977.
Christensen-Dalsgaard, J. and Berthomieu, G., 1991, in A. N. Cox and W. C. Livingston (eds), The Solar Interior and Atmosphere, The University of Arizona Press, Boulder, p. 401.
Christensen-Dalsgaard, J., Proffitt, C. R., and Thompson, M. J.: 1993, Astrophys. J. 403, L75.
Delache P. and Scherrer P. H.: 1983. Nature 306, 651.
Fröhlich, C.: 1990, in H. Shibahashi (ed.), "Search for g-modes in the IPHIR data", Progress of Seismology of the Sun and Stars, Hakone, Japan, Springer-Verlag, Berlin, Vol. 367, p. 221.
Fröhlich, C., Bonnet, R. M., Bruns, A. V., Delaboudiniere, J. P., Domingo, V., Kotov, V. A., Kollath, Z., Rashkovsky, D. N., Toutain, T., and Vial, J. C.: 1988, in E. J. Rolfe (ed.), 'IPHIR: The Helioseismology Experiment on the PHOBOS Mission', Seismology of the Sun and Sun-like Stars, ESA SP-286, p. 359.
Fröhlich, C. et al.: 1998, 'Observational upper limits for low-degree solar g-modes', SOHO 6/GONG 98 Workshop, Boston, USA, SP-418, p. 67.
Gabriel, A. H. et al.: 1998, 'Search for g-Mode Frequencies in the GOLF Oscillations Spectrum', SOHO 6/GONG 98 Workshop, Boston, U.S.A., SP-418, p. 61.
Henning, H. M. and Scherrer, P. H.: 1988, in E. J. Rolfe (ed.), 'The Search for Solar Gravity Modes', Seismology of the Sun and Sun-like Stars, ESA SP-286, p. 419.
Hill, H. A.: 1984, 'The Observed Low-Order, Low-Degree Acoustic Mode Eigenfrequency Spectrum and Its Properties', SCLERA Mono. Series in Astrophys. 1.
Jiménez, A., Pallé, P., Régulo, C., Roca Cortés, T., Isaak, G. R., McLeod, C. P., and van der Raay, H. B.: 1986, Adv. Space Res. 6(8), 89.
Kuhn, J. R., Libbrecht, K. G., and Dicke, R. H.: 1986, Nature 319, 128.
Martín Mateos, I.: 1997, Thesis, University of La Laguna.
Pallé P. L.: 1986, Thesis, University of La Laguna.
Pallé, P. L.: 1991, Adv. Space Res. 11, 29.
Pallé, P. L., Fossat, E., Régulo, C., Loudagh, S., Schmider, F. X., Ehgamberdiev, S., Gelly, B., Grec, G., Khalikov, S., Lazrek, M., and Sanchez, L.: 1993, Astron. Astrophys. 280, 324.
Severny, A. B., Kotov, V. A., and Tsap, T. T.: 1976, Nature 259, 87.
Severny, A. B., Kotov, V. A., and Tsap, T. T.: 1984, Nature 307, 247.
Thompson, D. J., Maclennan, C. G., and Lanzerotti, L. J.: 1995, Nature 376, 139.
van der Raay, H. B.: 1988, in E. J. Rolfe (ed.), 'Long Period Solar Oscillations', Seismology of the Sun and Sun-like Stars, ESA SP-286, p. 339.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Mateos, I.M., Pallé, P. A new observational strategy in search for solar g-modes. Solar Physics 189, 241–260 (1999). https://doi.org/10.1023/A:1005274018276
Issue Date:
DOI: https://doi.org/10.1023/A:1005274018276