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

Braneworld gravity is a model that endows physical space with an extradimension. In the type II Randall-Sundrum braneworld gravity model, the extradimension modifies the spacetime geometry around black holes, and changespredictions for the formation and survival of primordial black holes. Wedevelop a comprehensive analytical formalism for far-field black hole lensingin this model, using invariant quantities to compute all geometric opticslensing observables. We then make the first analysis of wave optics inbraneworld lensing, working in the semi-classical limit. We show that waveoptics offers the only realistic way to observe braneworld effects in blackhole lensing. We point out that if primordial braneworld black holes exist,have mass M, and contribute a fraction f of the dark matter, then roughly 3e5 xf (M/1e-18 Msun)^(-1) of them lie within our Solar System. These objects, whichwe call "attolenses," would produce interference fringes in the energy spectraof gamma-ray bursts at energies ~100 (M/1e-18 Msun)^(-1) MeV (which will soonbe accessible with the GLAST satellite). Primordial braneworld black holesspread throughout the universe could produce similar interference effects; theprobability for "attolensing" may be non-negligible. If interference fringeswere observed, the fringe spacing would yield a simple upper limit on M.Detection of a primordial black hole with M <~ 1e-19 Msun would challengegeneral relativity and favor the braneworld model. Further work on lensingtests of braneworld gravity must proceed into the physical optics regime, whichawaits a description of the full spacetime geometry around braneworld blackholes.Comment: 13 pages, 3 figures; accepted in PRD; expanded discussion of  prospects for observing attolensing with GLAS

Formalism for testing theories of gravity using lensing by compact objects. III. Braneworld gravity