Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Philipp, Dennis"'
Autor:
Scheumann, Jan, Philipp, Dennis, Herrmann, Sven, Hackmann, Eva, Rievers, Benny, Ventura-Traveset, Javier, Mendes, Luis, Lämmerzahl, Claus
All experiments to date are in remarkable agreement with the predictions of Einstein's theory of gravity, General Relativity. Besides the classical tests, involving light deflection, orbit precession, signal delay, and the gravitational redshift, mod
Externí odkaz:
http://arxiv.org/abs/2311.12018
Publikováno v:
Phys. Rev. D 109, 044056 (2024)
Spacetime perturbations due to scalar, vector, and tensor fields on a fixed background geometry can be described in the framework of Teukolsky's equation. In this work, wave scattering is treated analytically, using the Green's function method and so
Externí odkaz:
http://arxiv.org/abs/2310.12917
One of geodesy's main tasks is to determine the gravity field of the Earth. High precision clocks have the potential to provide a new tool in a global determination of the Earth's gravitational potential based on the gravitational redshift. Towards t
Externí odkaz:
http://arxiv.org/abs/2310.11576
Autor:
Stoja, Endri, Konstandin, Simon, Philipp, Dennis, Wilke, Robin N., Betancourt, Diego, Bertuch, Thomas, Jenne, Juergen, Umathum, Reiner, Guenther, Matthias
Publikováno v:
Stoja, E., Konstandin, S., Philipp, D. et al. Improving magnetic resonance imaging with smart and thin metasurfaces. Sci Rep 11, 16179 (2021)
Over almost five decades of development and improvement, Magnetic Resonance Imaging (MRI) has become a rich and powerful, non-invasive technique in medical imaging, yet not reaching its physical limits. Technical and physiological restrictions constr
Externí odkaz:
http://arxiv.org/abs/2105.09634
Publikováno v:
Phys. Rev. D 101, 064032 (2020)
The Earth's geoid is one of the most essential and fundamental concepts to provide a gravity field-related height reference in geodesy and associated sciences. To keep up with the ever-increasing experimental capabilities and to consistently interpre
Externí odkaz:
http://arxiv.org/abs/1912.10159
We derive exact expressions for the relativistic redshift between an Earth-bound observer, that is meant to model a standard clock on the Earth's surface, and various (geodesic) observers in the Schwarzschild spacetime. We assume that the observers e
Externí odkaz:
http://arxiv.org/abs/1711.01237
Autor:
Philipp, Dennis, Wöske, Florian, Biskupek, Liliane, Hackmann, Eva, Mai, Enrico, List, Meike, Lämmerzahl, Claus, Rievers, Benny
Publikováno v:
Advances in Space Research, Volume 62, Issue 4, 2018, Pages 921-934
Accurate orbit modeling plays a key role in contemporary and future space missions such as GRACE and its successor GRACE-FO, GNSS, and altimetry missions. To fully exploit the technological capabilities and correctly interpret measurements, relativis
Externí odkaz:
http://arxiv.org/abs/1708.04609
Publikováno v:
Phys. Rev. D 95, 104037 (2017)
We present a definition of the geoid that is based on the formalism of general relativity without approximations; i.e. it allows for arbitrarily strong gravitational fields. For this reason, it applies not only to the Earth and other planets but also
Externí odkaz:
http://arxiv.org/abs/1702.08412
Akademický článek
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Publikováno v:
''Relativistic Geodesy: Foundations and Applications'', D. Puetzfeld and C. Laemmerzahl (eds.), Fundamental Theories of Physics 196, pages 419-451, Springer 2019, DOI: 10.1007/978-3-030-11500-5_13, ISBN 978-3-030-11500-5 (online)
Within the theory of General Relativity, we study the solution and range of applicability of the standard geodesic deviation equation in highly symmetric spacetimes. In the Schwarzschild spacetime, the solution is used to model satellite orbit conste
Externí odkaz:
http://arxiv.org/abs/1604.07173