Work

Imprints of dark stars in the 21-cm signal

Year: 2024

Type: conference-paper

Abstract: A strongly self-interacting component of dark matter can lead to formation of compact objects. These objects (dark stars) can in principle be detected by emission of gravitational waves from coalescence with black holes or other neutron stars or via gravitational lensing. However, in the case where dark matter admits annihilations, these compact dark matter made objects can have significant impact on the cosmic reionization and the 21-cm signal. We demonstrate that even if dark matter very small annihilations, dark stars could inject a substantial amount of photons that would interact with the intergalactic medium. For dark matter parameters compatible with current observational constraints, dark stars could modify the observed reionization signal in a significant way.

Source: International Conference on High Energy Physics (ICHEP)

DOI: 10.22323/1.476.0655

Authors: Boris Betancourt Kamenetskaia, Alejandro Ibarra, Chris Kouvaris

Institutions: Max Planck Institute for Physics, Technical University of Munich, National Technical University of Athens

Language: English

Topic: Dark Matter and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Deutsche Forschungsgemeinschaft

Awards: G1897041155, G4066435496, G4090823411, EXC 2094: ORIGINS: Vom Ursprung des Universums bis zu den ersten Bausteinen des Lebens