Sensitivities on non-spinning and spinning primordial black hole dark matter with global 21 cm troughs

Understand

Detection of the global 21 cm signal arising from neutral hydrogen can revolutionize our understanding of the standard evolution of the universe after recombination.

• In addition, it can also be an excellent probe of Dark Matter (DM).
• Among all the DM candidates, Primordial Black Holes (PBHs) are one of the most well-motivated.
• Hawking emission from low-mass PBHs can have substantial effect on the thermal and ionization history of the early universe, and that in turn can have an imprint on the global 21 cm signal.