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Non-uniqueness of the Quasinormal Mode Expansion of Electromagnetic Lorentz Dispersive Materials

Autor: Gras, Alexandre, Lalanne, Philippe, Duruflé, Marc

Any optical structure possesses resonance modes and its response to an excitation can be decomposed onto the quasinormal and numerical modes of discretized Maxwell's operator. In this paper, we consider a dielectric permittivity that is a N-pole Lore

Externí odkaz: http://arxiv.org/abs/1910.09429

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Atmospheric radiation boundary conditions for high frequency waves in time-distance helioseismology

Autor: Fournier, Damien, Leguebe, Michael, Hanson, Chris S., Gizon, Laurent, Barucq, Helene, Chabassier, Juliette, Durufle, Marc

Publikováno v: A&A 608, A109 (2017)

The temporal covariance between seismic waves measured at two locations on the solar surface is the fundamental observable in time-distance helioseismology. Above the acoustic cut-off frequency ($\sim$5.3~mHz), waves are not trapped in the solar inte

Externí odkaz: http://arxiv.org/abs/1709.02156

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Computational helioseismology in the frequency domain: acoustic waves in axisymmetric solar models with flows

Autor: Gizon, Laurent, Barucq, Hélène, Duruflé, Marc, Hanson, Chris S., Leguèbe, Michael, Birch, Aaron C., Chabassier, Juliette, Fournier, Damien, Hohage, Thorsten, Papini, Emanuele

Publikováno v: A&A 600, A35 (2017)

Local helioseismology has so far relied on semi-analytical methods to compute the spatial sensitivity of wave travel times to perturbations in the solar interior. These methods are cumbersome and lack flexibility. Here we propose a convenient framewo

Externí odkaz: http://arxiv.org/abs/1611.01666

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