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

We impose the first strong-lensing constraints on a wide class of modifiedgravity models where an extra field that modifies gravity also couples tophotons (either directly or indirectly through a coupling with baryons) andthus modifies lensing. We use the nonsingular isothermal ellipsoid (NIE)profile as an effective potential, which produces flat galactic rotationcurves. If a concrete modified gravity model gives a flat rotation curve, thenthe parameter $\Gamma$ that characterizes the lensing effect must take somedefinite value. We find that $\Gamma = 1.24\pm0.65$ at $1\sigma$, consistentwith general relativity ($\Gamma = 1$). This constrains the parameter space insome recently proposed models.

Strong lensing constraints on modified gravity models