Tidal Love numbers of novel and admixed celestial objects

Collier, Michael; Croon, Djuna; Leane, Rebecca K.

Abstract

A subfraction of dark matter or new particles trapped inside celestial objects can significantly alter their macroscopic properties. We investigate the new physics imprint on celestial objects by using a generic framework to solve the Tolman-Oppenheimer-Volkoff (TOV) equations for up to two fluids. We test the impact of populations of new particles on celestial objects, including the sensitivity to self-interaction sizes, new particle mass, and net population mass. Applying our setup to neutron stars and boson stars, we find rich phenomenology for a range of these parameters, including the creation of extended atmospheres. These atmospheres are detectable by their impact on the tidal Love number, which can be measured at upcoming gravitational wave experiments such as Advanced LIGO, the Einstein Telescope, and LISA. We release our calculation framework as a publicly available code, allowing the TOV equations to be generically solved for arbitrary new physics models in novel and admixed celestial objects.

Citation

Collier, M., Croon, D., & Leane, R. K. (2022). Tidal Love numbers of novel and admixed celestial objects. Physical Review D, 106(12), Article 123027. https://doi.org/10.1103/physrevd.106.123027

• Journal Article Type: Article
• Acceptance Date: Dec 13, 2022
• Online Publication Date: Dec 27, 2022
• Publication Date: Dec 15, 2022
• Deposit Date: Jul 31, 2024
• Publicly Available Date: Aug 1, 2024
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 106
• Issue: 12
• Article Number: 123027
• DOI: https://doi.org/10.1103/physrevd.106.123027
• Public URL: https://durham-repository.worktribe.com/output/2641881