Axion oscillations in binary systems: angle-action surgery
| Autor: | Vincent Desjacques, Evgeni Grishin, Yonadav Barry Ginat |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
010504 meteorology & atmospheric sciences FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences Binary pulsar General Relativity and Quantum Cosmology High Energy Physics - Phenomenology (hep-ph) Pulsar 0103 physical sciences Tensor 010303 astronomy & astrophysics Axion Harmonic oscillator 0105 earth and related environmental sciences Physics High Energy Astrophysical Phenomena (astro-ph.HE) Time evolution Scalar (physics) Astronomy and Astrophysics Mass ratio Astrophysics - Astrophysics of Galaxies High Energy Physics - Phenomenology Space and Planetary Science Quantum electrodynamics Astrophysics of Galaxies (astro-ph.GA) Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | Scalar, tensor waves induce oscillatory perturbations in Keplerian systems that can be probed with measurements of pulsar timing residuals. In this paper, we consider the imprint of coherent oscillations produced by ultralight axion dark matter on the Roemer time delay. We use the angle-action formalism to calculate the time evolution of the observed signal and its dependence on the orbital parameters and the axion phase. We derive exact analytical expressions for arbitrary binary pulsar mass ratio and eccentricity, alleviating the need for long numerical integrations. We emphasize the similarity of the expected signal-to-noise ratio with the response of a harmonic oscillator to an external oscillatory driving. We validate our theoretical predictions with numerical simulations. Our results furnish a useful benchmark for numerical codes and analysis procedures and, hopefully, will motivate the search for such imprints in real data. 15 pages, 5 figures (v2): moderate revision. matches the published manuscript (v3): references added |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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