English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Detection of the global 21 cm signal arising from neutral hydrogen canrevolutionize our understanding of the standard evolution of the universe afterrecombination. 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 themost well-motivated. Hawking emission from low-mass PBHs can have substantialeffect on the thermal and ionization history of the early universe, and that inturn can have an imprint on the global 21 cm signal. Recently EDGES has claimeda global 21 cm signal, though SARAS 3 has rejected that claim. In this work, weinvestigate the sensitivities on non-spinning and spinning PBHs arising from anEDGES-like measurement of the global 21 cm signal, and find that thesensitivities will be competitive with those arising from other astrophysicalobservables. We show that the sensitivities can be significantly strengtheneddepending on various uncertain astrophysical parameters. Besides, we alsoderive projections on the PBH density from the absorption trough expectedduring the Dark Ages. Our work shows that the near future unambiguous detectionof the global 21 cm absorption troughs can be an excellent probe of PBH DM.

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