2014/10/01 by Kanhaiya Lal Pandey, Pandey, Kanhaiya L., Tirthankar Roy Choudhury +5 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena
paper · pdf · doi:10.48550/arxiv.1410.0368
openalex publication_date 2014/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the impact of the extra density fluctuations induced by primordial magnetic fields on the reionization history in the redshift range: 6 < z < 10. We perform a comprehensive MCMC physical analysis allowing the variation of parameters related to primordial magnetic fields (strength, B0, and power-spectrum index n\scriptscriptstyle \rm B), reionization, and ΛCDM cosmological model. We find that magnetic field strengths in the range: B0 ≃ 0.05-0.3 nG (for nearly scale-free power spectra) can significantly alter the reionization history in the above redshift range and can relieve the tension between the WMAP and quasar absorption spectra data. Our analysis puts upper-limits on the magnetic field strength B0 < 0.358, 0.120, 0.059 nG (95 % c.l.) for n\scriptscriptstyle \rm B = -2.95, -2.9, -2.85, respectively. These represent the strongest magnetic field constraints among those available from other cosmological observables.