5 papers
Can WIMPs Survive the Legacy of a Magnetised Early Universe?
MarÃa Olalla Olea-Romacho, Malcolm Fairbairn, Pranjal Ralegankar
Primordial magnetic fields (PMFs) can seed additional small-scale matter fluctuations, leading to the formation of dense, early-collapsing dark matter structures known as minihalos…
Gravothermalizing into primordial black holes, boson stars, and cannibal stars
Pranjal Ralegankar, Daniele Perri, Takeshi Kobayashi
Very little is known about the cosmological history from after the end of inflation until Big Bang Nucleosynthesis. Various well-motivated models predict that the universe could ha…
Constraints on Primordial Magnetic Fields from the Lyman-α forest
Mak PaviÄeviÄ, Vid IrÅ¡iÄ, Matteo Viel +5
We present the first constraints on primordial magnetic fields from the Lyman- forest using full cosmological hydrodynamic simulations. At the scales and redshifts probed by th…
Matter power spectrum induced by primordial magnetic fields: from the linear to the non-linear regime
Pranjal Ralegankar, Enrico Garaldi, Matteo Viel
Linear theory predicts that primordial magnetic fields (PMFs) enhance the matter power spectrum on small scales. However, the linear approximation breaks down on sufficiently small…
Primordial magnetic fields: consistent initial conditions and impact on high-z structures
Pranjal Ralegankar, Mak PaviÄeviÄ, Matteo Viel
Primordial magnetic fields (PMFs) can enhance matter power spectrum on small scales ( Mpc) and still agree with bounds from cosmic microwave background (CMB) and Faraday…