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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The Event Horizon Telescope (EHT) is a project to assemble a Very LongBaseline Interferometry (VLBI) network of mm wavelength dishes that can resolvestrong field General Relativistic signatures near a supermassive black hole. Asplanned, the EHT will include enough dishes to enable imaging of the predictedblack hole "shadow", a feature caused by severe light bending at the black holeboundary. The center of M87, a giant elliptical galaxy, presents one of themost interesting EHT targets as it exhibits a relativistic jet, offering theadditional possibility of studying jet genesis on Schwarzschild radius scales.Fully relativistic models of the M87 jet that fit all existing observationalconstraints now allow horizon-scale images to be generated. We performrealistic VLBI simulations of M87 model images to examine detectability of theblack shadow with the EHT, focusing on a sequence of model images with achanging jet mass load radius. When the jet is launched close to the blackhole, the shadow is clearly visible both at 230 and 345 GHz. The EHT array witha resolution of 20-30$\mu$as resolution ($\sim$2-4 Schwarzschild radii) is ableto image this feature independent of any theoretical models and we show thatimaging methods used to process data from optical interferometers areapplicable and effective for EHT data sets. We demonstrate that the EHT is alsocapable of tracing real-time structural changes on a few Schwarzschild radiiscales, such as those implicated by VHE flaring activity of M87. Whileinclusion of ALMA in the EHT is critical for shadow imaging, generally thearray is robust against loss of a station.

Imaging the Supermassive Black Hole Shadow and Jet Base of M87 with the Event Horizon Telescope