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| Paper: |
Constraining Gravitational Theories by Observing Magnetic White Dwarfs |
| Volume: |
334, 14th European Workshop on White Dwarfs |
| Page: |
265 |
| Authors: |
Preuss, O.; Jordan, S.; Haugan, M.P.; Solanki, S.K. |
| Abstract: |
Under the assumption of a specific nonminimal coupling of torsion to electromagnetism, spacetime is birefringent in the presence of a gravitational field leading to depolarization of light emitted from extended astrophysical sources. We use polarimetric data of the magnetic white dwarf RE J0317-853 to set for the very first time constraints on the essential coupling constant for this effect, giving k2 ≤ (22m)2. |
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