Dark Kinetic Heating of Exoplanets and Brown Dwarfs

• DOI: 10.48550/arxiv.2405.02393
• Publication Date: 2024-05-03
• Authors: Javier F. Acevedo; Rebecca K. Leane; Aidan Reilly
• Keywords: Earth and Planetary Astrophysics (astro-ph.EP); High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); Astrophysics - Solar and Stellar Astrophysics; FOS: Physical sciences; Astrophysics - High Energy Astrophysical Phenomena; Solar and Stellar Astrophysics (astro-ph.SR); Astrophysics - Earth and Planetary Astrophysics

Dark kinetic heating of neutron stars has been previously studied as a promising dark matter detection avenue. Kinetic occurs when is sped up to relativistic speeds in the gravitational well high-escape velocity objects, and deposits energy after becoming captured by object, thereby increasing its temperature. We show that can be significant even objects with low-escape velocities, such exoplanets brown dwarfs, discovery potential searches. This occur if there long-range force, creating "dark escape velocity", leading rates substantially larger than those expected from stars. consequently set constraints on sector parameters using Wide-field Infrared Survey Explorer JWST data Super-Jupiter WISE 0855-0714, map out future sensitivity scattering cross section below $10^{-40}~{\rm cm}^2$. compare other lower Earth, Sun, white finding complementary signals are possible depending particle physics parameters.