Analytic self-force calculations in the post-Newtonian regime: eccentric orbits on a Schwarzschild background
| Autor: | Hopper, Seth, Kavanagh, Chris, Ottewill, Adrian C. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 93, 044010 (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.93.044010 |
| Popis: | We present a method for solving the first-order field equations in a post-Newtonian (PN) expansion. Our calculations generalize work of Bini and Damour and subsequently Kavanagh et al., to consider eccentric orbits on a Schwarzschild background. We derive expressions for the retarded metric perturbation at the location of the particle for all $\ell$-modes. We find that, despite first appearances, the Regge-Wheeler gauge metric perturbation is $C^0$ at the particle for all $\ell$. As a first use of our solutions, we compute the gauge-invariant quantity $\langle U \rangle$ through 4PN while simultaneously expanding in eccentricity through $e^{10}$. By anticipating the $e\to 1$ singular behavior at each PN order, we greatly improve the accuracy of our results for large $e$. We use $\langle U \rangle$ to find 4PN contributions to the effective one body potential $\hat Q$ through $e^{10}$ and at linear order in the mass-ratio. Comment: 20 pages, 2 figures, Updated with minor changes, mostly to references |
| Databáze: | arXiv |
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