Detection of dilute axion stars with stimulated decay
arXiv:2407.08436 · doi:10.1103/PhysRevD.111.023011
Abstract
The anomalous orbits of trans-Neptunian objects can be accounted for by the planet 9 hypothesis. One intriguing possibility is that planet 9 could be a dilute axion star captured by the solar system, with the ratio of the axion star to dark matter being approximately 1/10. Although dilute axion stars can emit monochromatic signals through two-photon decay, the spontaneous decay signal is too weak to be detected by radio telescopes. However, we find that stimulated decay of the dilute axion star, which explains planet 9, can occur by directing a radio beam with a power of 50MW into the star. The resulting echo can be detected by terrestrial telescopes such as SKA, FAST, ngLOBO, and LOFAR. Therefore, the dilute axion star can be distinguished from other planet 9 candidates, such as a primordial black hole or a free-floating planet captured by the solar system.
7 pages, 3 figures; accepted for publication in Physical Review D
References in corpus (17)
- Bose-Einstein Condensation of Dark Matter Axions
- Constraints on Earth-mass primordial black holes from OGLE 5-year microlensing events
- No large population of unbound or wide-orbit Jupiter-mass planets
- Dilute and dense axion stars
- Relativistic axions from collapsing Bose stars
- The Planet Nine Hypothesis
- Quantum Radiation of Oscillons
- Boson Stars and Oscillatons: A Review
- Novel cosmological bounds on thermally-produced axion-like particles
- Merger of Dark Matter Axion Clumps and Resonant Photon Emission
- Collisional interactions between self-interacting non-relativistic boson stars: effective potential analysis and numerical simulations
- Recurrent Axinovae and their Cosmological Constraints
- Possible evidence of QCD axion stars in HSC and OGLE microlensing events
- Soliton Merger Rates and Enhanced Axion Dark Matter Decay
- Stimulated decay of collapsing axion stars and fast radio bursts
- Listening for echo from the stimulated axion decay with the 21 CentiMeter Array
- Can Planet 9 be an Axion Star?