A new study brings a fresh chance to detect small-scale primordial fluctuations and the nature of dark matter in early stages of the Universe, using simple global 21 cm signal experiments rather than expensive interferometer arrays.
This is a preview of subscription content, access via your institution
Access options
Access Nature and 54 other Nature Portfolio journals
Get Nature+, our best-value online-access subscription
$32.99 / 30 days
cancel any time
Subscribe to this journal
Receive 12 digital issues and online access to articles
$119.00 per year
only $9.92 per issue
Rent or buy this article
Prices vary by article type
from$1.95
to$39.95
Prices may be subject to local taxes which are calculated during checkout
References
Park, H. et al. Nat. Astron. https://doi.org/10.1038/s41550-025-02637-0 (2025).
Xu, Y., Yue, B. & Chen, X. Astrophys. J. 923, 98 (2021).
Polidan, R. S. et al. Adv. Space Res. 74, 528–546 (2024).
Chen, X. et al. Philos. Trans. R. Soc. A 382, 20230094 (2024).
Burns, J. et al. Preprint at https://arxiv.org/abs/2103.08623 (2021).
Alexander, J. K., Kaiser, M. L., Novaco, J. C., Grena, F. R. & Weber, R. R. Astron. Astrophys. 40, 365–371 (1975).
Mesinger, A., Furlanetto, S. & Cen, R. Mon. Not. R. Astron. Soc. 411, 955–972 (2011).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Competing interests
The author declares no competing interests.
Rights and permissions
About this article
Cite this article
Yue, B. Traces of small dark structures in the global 21 cm signal. Nat Astron 9, 1607–1608 (2025). https://doi.org/10.1038/s41550-025-02692-7
Published:
Version of record:
Issue date:
DOI: https://doi.org/10.1038/s41550-025-02692-7
