Bibcode
Rodríguez Hidalgo, I.; Ruiz Cobo, B.; Collados Vera, M.; Bellot Rubio, L. R.
Referencia bibliográfica
In: Proceedings of the SOHO 10/GONG 2000 Workshop: Helio- and asteroseismology at the dawn of the millennium, 2-6 October 2000, Santa Cruz de Tenerife, Tenerife, Spain. Edited by A. Wilson, Scientific coordination by P. L. Pallé. ESA SP-464, Noordwijk: ESA Publications Division, ISBN 92-9092-697-X, 2001, p. 239 - 242
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1
2001
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Descripción
The stratification of acoustic oscillations through the solar
photosphere in Lagrangian (comoving) coordinates has been evaluated from
a quasi-NLTE inversion of the radiative transfer equation (RTE) applied
to a temporal sequence of K I 7699 Å line spectra. The
stratifications of amplitude and phase of the temperature and
line-of-sight (LOS) velocity Lagrangian oscillations have been
evaluated. Our results suggest that, to first order, the photosphere
moves up and down as a whole with amplitudes ranging from ~8 km in deep
layers (around 0 km) to ~19 km in the upper layers (around 640 km).
Numerous short-lived, local temperature and velocity amplitude
enhancements in medium-high layers are observed, together with an
asymmetric waveform in the oscillation of these two physical quantities.
Two nodes are clearly seen in the Lagrangian temperature oscillation
run, which are associated with sharp phase jumps of about 180°. The
velocity amplitude shows the well known increase with geometrical
height, keeping practically in phase.