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 report the discovery of an ultra-faint Milky Way satellite galaxy in theconstellation of Pegasus. The concentration of stars was detected by applyingour overdensity detection algorithm to the SDSS-DR 10 and confirmed with deeperphotometry from the Dark Energy Camera at the 4-m Blanco telescope. Fittingmodel isochrones indicates that this object, Pegasus III, features an old andmetal-poor stellar population ([Fe/H]$\sim-2.1$) at a heliocentric distance of$205\pm20$ kpc. The new stellar system has an estimated half-light radius of$r_h=78^{+30}_{-24}$ pc and a total luminosity of $M_{V}\sim-4.1\pm0.5$ thatplaces it into the domain of dwarf galaxies on the size--luminosity plane.Pegasus III is spatially close to the MW satellite Pisces II. It is possiblethat the two might be physically associated, similar to the Leo IV and Leo Vpair. Pegasus III is also well aligned with the Vast Polar Structure, whichsuggests a possible physical association.

A Hero's Dark Horse: Discovery of an Ultra-Faint Milky Way Satellite in Pegasus