Conservative Spin Magnitude Change in Orbital Evolution in General Relativity
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913726195564544 |
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| author | Alaverdian, Mark Bern, Zvi Kosmopoulos, Dimitrios Luna, Andres Roiban, Radu Scheopner, Trevor Teng, Fei |
| author_facet | Alaverdian, Mark Bern, Zvi Kosmopoulos, Dimitrios Luna, Andres Roiban, Radu Scheopner, Trevor Teng, Fei |
| contents | We show that physical scattering observables for compact spinning objects in general relativity can depend on additional degrees of freedom in the spin tensor beyond those described by the spin vector alone. The impulse, spin kick, and leading-order waveforms exhibit such a nontrivial dependence. A signal of this additional structure is the change in the magnitude of the spin vector under conservative Hamiltonian evolution, similar to our previous studies in electrodynamics. These additional degrees of freedom describe dynamical mass multipoles of compact objects and decouple for black holes. We also show that the conservative impulse, spin kick and change of the additional degrees of freedom are encoded in the eikonal phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_10928 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Conservative Spin Magnitude Change in Orbital Evolution in General Relativity Alaverdian, Mark Bern, Zvi Kosmopoulos, Dimitrios Luna, Andres Roiban, Radu Scheopner, Trevor Teng, Fei High Energy Physics - Theory General Relativity and Quantum Cosmology We show that physical scattering observables for compact spinning objects in general relativity can depend on additional degrees of freedom in the spin tensor beyond those described by the spin vector alone. The impulse, spin kick, and leading-order waveforms exhibit such a nontrivial dependence. A signal of this additional structure is the change in the magnitude of the spin vector under conservative Hamiltonian evolution, similar to our previous studies in electrodynamics. These additional degrees of freedom describe dynamical mass multipoles of compact objects and decouple for black holes. We also show that the conservative impulse, spin kick and change of the additional degrees of freedom are encoded in the eikonal phase. |
| title | Conservative Spin Magnitude Change in Orbital Evolution in General Relativity |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2407.10928 |