Comparison of Two Fitting Methods for Ring Diagram Analysis of Very High L Solar Oscillations

Bibcode
1997ApJ...485..869P
DOI
10.1086/304469
Patron, J.; Gonzalez Hernandez, I.; Chou, Dean-Yi; Sun, M.-T.; Mu, T.-M.; Loudagh, S.; Bala, B.; Chou, Y.-P.; Lin, C.-H.; Huang, I.-J.; Jiménez, A.; Rabello-Soares, M. C.; Ai, G.; Wang, G.-P.; Zirin, H.; Marquette, W.; Nenow, J.; Ehgamberdiev, S.; Khalikov, S.; TON Team
Referencia bibliográfica

Astrophysical Journal v.485, p.869

Fecha de publicación:
8
1997
Número de autores
20
Número de autores del IAC
1
Número de citas
31
Número de citas referidas
23
Descripción
A new method of fitting tridimensional power spectra of solar oscillations is described and compared with a previous one whose use has been more common. The new method fits the parameters of the Lorentzian profiles in a bidimensional k - omega diagram constructed from an azimuthal average of the tridimensional one. The horizontal velocities are then determined keeping these parameters fixed, greatly reducing the computation time. Both methods are compared for two radial orders (n = 3, 4) of a tridimensional power spectrum obtained for a region of about 15 deg square around solar disk center. The images used in this work correspond to a 3 day set of 1080 x 1080 pixel intensity images obtained at the Observatorio del Teide on 1994 November 8--10 with the Taiwanese Oscillation Network (TON) instrument. The results of the fitted velocities agree within the estimated errors for the two methods. The reduction of the computing time obtained with the new method makes it convenient for the ring diagram analysis.
Tipo
Con árbitro
Métodos

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