The use of a liquid crystal as an optical modulator for use with a resonant scattering spectrometer has been investigated. Preliminary data indicate that using...
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PublicaciónA liquid crystal modulator
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PublicaciónA measurement of the background solar velocity spectrum
Ten years of continuous measurements of the radial velocity of the Sun have been used to estimate the contribution of various solar surface phenomena to the...
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PublicaciónAmbipolar Diffusion in the Lower Solar Atmosphere: Magnetohydrodynamic Simulations of a Sunspot
Magnetohydrodynamic (MHD) simulations of the solar atmosphere are often performed under the assumption that the plasma is fully ionized. However, in the lower...
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PublicaciónAn attempt to identify low L - low N solar acoustic modes
The low l solar acoustic spectrum has been measured with great accuracy for intermediate radial order modes, n = 11-34 (Jimenez et al., 1986; Grec et al., 1983...
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PublicaciónAnalysis of rotational frequency splittings sensitive to the rotation rate of the solar core
Updated solar frequency splitting measurements suggest a slight decrease of the rotation rate below 0.25 Rsolar and, albeit preliminary, rule out a core...
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PublicaciónBackground solar irradiance spectrum at high and low phases of the solar activity cycle
Two data series of disk integrated solar irradiance, taken by the Variability of the solar IRradiance and Gravity Oscillations (VIRGO) experiment on board the...
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PublicaciónBackground solar velocity spectrum at high and low phases of solar activity cycle
Using GOLF/SOHO data a detailed analysis of the solar background spectrum has been performed at high and low phases of solar activity cycle. The analysis...
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PublicaciónCan solar g-modes be identified from ground-based velocity measurements
The question of whether or not solar g-modes can be detected and identified from ground observations is addressed. The limitation imposed by the Earth's...
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PublicaciónChromospheric Resonances above Sunspots and Potential Seismological Applications
Oscillations in sunspot umbrae exhibit remarkable differences between the photosphere and chromosphere. We evaluate two competing scenarios proposed for...