Periodic gravitational lensing by oscillating boson stars
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915636483981312 |
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| author | Yang, Xing-Yu Chen, Tan Cai, Rong-Gen |
| author_facet | Yang, Xing-Yu Chen, Tan Cai, Rong-Gen |
| contents | We show that oscillating (real-scalar) boson stars can act as strictly periodic gravitational lenses and generically host an \emph{oscillating radial caustic}. Sources near this caustic cross it every half period, producing achromatic phase-locked photometric spikes synchronized with an astrometric wobble, providing a promising target for time-domain astronomy. Event-number estimation indicates a measurable discovery space with current astrometric and high-cadence photometric surveys. These predictions rely only on the dynamics of long-lived real-scalar condensates, therefore offering a clean test of self-gravitating quantum fields in curved spacetime. The framework extends naturally to self-interacting real scalars (including axion-like particles) and to ultralight vector bosons. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_19606 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Periodic gravitational lensing by oscillating boson stars Yang, Xing-Yu Chen, Tan Cai, Rong-Gen General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Physics - Phenomenology We show that oscillating (real-scalar) boson stars can act as strictly periodic gravitational lenses and generically host an \emph{oscillating radial caustic}. Sources near this caustic cross it every half period, producing achromatic phase-locked photometric spikes synchronized with an astrometric wobble, providing a promising target for time-domain astronomy. Event-number estimation indicates a measurable discovery space with current astrometric and high-cadence photometric surveys. These predictions rely only on the dynamics of long-lived real-scalar condensates, therefore offering a clean test of self-gravitating quantum fields in curved spacetime. The framework extends naturally to self-interacting real scalars (including axion-like particles) and to ultralight vector bosons. |
| title | Periodic gravitational lensing by oscillating boson stars |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.19606 |