![]() Then, we focus on a particular type of hypothetical particles-axions. We summarize regimes and rates of particle capturing as well as possible astrophysical consequences. Dark matter particles can be collected inside compact objects resulting in additional heating or collapse. We review several aspects of astroparticle physics studies related to observations and properties of these celestial bodies. Among astronomical sources, used in interests of fundamental physics, compact objects-neutron stars and white dwarfs-play a leading role. In such cases, astrophysical studies can help to expand the range of values significantly. ![]() Sometimes, laboratory experiments can test required regions of parameter space, but more often natural limitations lead to poorly restrictive upper limits. Probing the existence of hypothetical particles beyond the Standard model often deals with extreme parameters: large energies, tiny cross-sections, large time scales, etc. We also discuss the readout and electronics systems needed to scale-up such detectors to the ton-scale and beyond. These advancements include: the use of negative ion drift, electron counting with high-definition electronic readout, time projection chambers with optical readout, and the possibility for nuclear recoil tracking in high-density gases such as argon. We also outline the R\
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