PIRSA:16060011 Conference Cosmology

DOI10.48660/16060011

Conference/School: Cosmological Frontiers in Fundamental Physics 2016

Gluscevic, V. (2016). A new probe of primordial magnetic fields at high redshift. Perimeter Institute. https://pirsa.org/16060011

Gluscevic, Vera. A new probe of primordial magnetic fields at high redshift. Perimeter Institute, Jun. 14, 2016, https://pirsa.org/16060011 

@misc{ pirsa_PIRSA:16060011,
  doi = {10.48660/16060011},
  url = {https://pirsa.org/16060011},
  author = {Gluscevic, Vera},
  keywords = {Cosmology},
  language = {en},
  title = {A new probe of primordial magnetic fields at high redshift},
  publisher = {Perimeter Institute},
  year = {2016},
  month = {jun},
  note = {PIRSA:16060011 see, \url{https://pirsa.org}}
}

Abstract

I will present a novel method for probing extremely weak large-scale magnetic fields in the intergalactic medium prior to the epoch of reionization. This method relies on the effect of spin alignment of hydrogen atoms in a cosmological setting, and on the effect of magnetic precession of the atoms on the statistics of the 21–cm brightness–temperature fluctuations. It is intrinsically sensitive to magnetic fields weaker than 10^{-19} Gauss in physical units, and thus has a potential to reach many orders of magnitude below the current constraints on primordial magnetic fields. I will discuss the physical mechanism, lay out the estimator formalism that enables searches with future 21-cm tomographic surveys, and present forecasts for detecting magnetic fields in the high-redshift universe using this method.

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