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

One of the key limitations of large-scale structure surveys of the currentand future generation, such as Euclid, LSST-Rubin or Roman, is the influence offeedback processes on the distribution of matter in the Universe. This effect,called baryonic feedback, modifies the matter power spectrum on non-linearscales much stronger than any cosmological parameter of interest. Constrainingthese modifications is therefore key to unlock the full potential of theupcoming surveys, and we propose to do so with the help of Fast Radio Bursts(FRBs). FRBs are short, astrophysical radio transients of extragalactic origin.Their burst signal is dispersed by the free electrons in thelarge-scale-structure, leading to delayed arrival times at differentfrequencies characterised by the dispersion measure (DM). Since the dispersionmeasure is sensitive to the integrated line-of-sight electron density, it is adirect probe of the baryonic content of the Universe. We investigate how FRBscan break the degeneracies between cosmological and feedback parameters bycorrelating the observed Dispersion Measure with the weak gravitational lensingsignal of a Euclid-like survey. In particular we use a simple one-parametermodel controlling baryonic feedback, but we expect similar findings for morecomplex models. Within this model we find that $\sim 10^4$ FRBs are sufficientto constrain the baryonic feedback 10 times better than cosmic shear alone.Breaking this degeneracy will tighten the constraints considerably, for examplewe expect a factor of two improvement on the sum of neutrino masses

Calibrating baryonic feedback with weak lensing and fast radio bursts