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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The photometry profile of the integrated Sachs-Wolfe (ISW) effect recentlyobtained by the Planck consortium by stacking patches of Cosmic MicrowaveBackground (CMB) sky maps around a large number of cosmic voids, contains acold ring at about half the void's effective radius surrounded by a hot ringnear the void's boundary. The source of the temperature structure is assumed tobe the ISW effect but the exact cause of the ringed structure is not currentlywell understood, particularly the outer hot ring. Numerical simulations havesuggested that hot/cold ring structures can be produced by motions associatedwith nonlinear growths of cosmic structures whose gravitational potentialsproduce the ISW effect. We have recently developed the embedded lens theory andthe Fermat potential formalism which can be used to model the ISW effect causedby intervening individual lens inhomogeneities evolving arbitrarily. Thistheory only requires knowledge of the void's projected mass profile as afunction of the passing CMB photons' impact radius and the rate of change ofthat mass distribution at passage. We present two simple embedded void lensmodels with evolving mass densities and investigate the ISW effect caused bythese lenses. Both models posses expanding mass shells which produce hot ringsaround central cold regions, consistent with the recent observations. By addinga small over-density at the void's center we can produce the slight positivetemperature excess hinted at in Planck's photometric results. We conclude thatthe embedded lens theory and the Fermat potential formalism is well suited formodeling the ISW effect.

Probing the integrated Sachs-Wolfe effect using embedded lens models