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- Max Planck Institute for Solar System ResearchDE4 papers
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10 papers · 1 filter
Measuring a Kaluza-Klein radius smaller than the Planck length
Frank Reifler, Randall Morris
Hestenes has shown that a bispinor field on a Minkowski space-time is equivalent to an orthonormal tetrad of one-forms together with a complex scalar field. More recently, the Dira…
The Space Infrared Interferometric Telescope (SPIRIT): High-resolution imaging and spectroscopy in the far-infrared
David Leisawitz, Charles Baker, Amy Barger +53
We report results of a recently-completed pre-Formulation Phase study of SPIRIT, a candidate NASA Origins Probe mission. SPIRIT is a spatial and spectral interferometer with an ope…
Dynamic fibrils in H-alpha and C IV
A. G. de Wijn, B. De Pontieu
Aim: To study the interaction of the solar chromosphere with the transition region, in particular active-region jets in the transition region and their relation to chromospheric fi…
Dynamics of the solar chromosphere. V. High-frequency modulation in ultraviolet image sequences from TRACE
A. G. de Wijn, R. J. Rutten, T. D. Tarbell
We search for signatures of high-frequency oscillations in the upper solar photosphere and low chromosphere in the context of acoustic heating of outer stellar atmospheres. We use…
Geometric Origin of Physical Constants in a Kaluza-Klein Tetrad Model
Frank Reifler, Randall Morris
An important feature of Kaluza-Klein theories is their ability to relate fundamental physical constants to the radii of higher dimensions. In previous Kaluza-Klein theory, which un…
Hestenes' Tetrad and Spin Connections
Frank Reifler, Randall Morris
Defining a spin connection is necessary for formulating Dirac's bispinor equation in a curved space-time. Hestenes has shown that a bispinor field is equivalent to an orthonormal t…