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

Motivated by recent observations of the Sagittarius stream, we devise a rapidalgorithm to generate faithful representations of the centroids of stellartidal streams formed in a disruption of a progenitor of an arbitrary mass in anarbitrary potential. Our method works by releasing swarms of test particles atthe Lagrange points around the satellite and subsequently evolving them in acombined potential of the host and the progenitor. We stress that the action ofthe progenitor's gravity is crucial to making streams that look almostindistinguishable from the N-body realizations, as indeed ours do. The methodis tested on mock stream data in three different Milky Way potentials withincreasing complexity, and is shown to deliver unbiased inference on theGalactic mass distribution out to large radii. When applied to the observationsof the Sagittarius stream, our model gives a natural explanation of thestream's apocentric distances and the differential orbital precession. We,therefore, provide a new independent measurement of the Galactic massdistribution beyond 50 kpc. The Sagittarius stream model favours a light MilkyWay with the mass 4.1 +/- 0.4 x 10^11 M_sun at 100 kpc, which can beextrapolated to 5.6 +/- 1.2 x 10^11 M_sun at 200 kpc. Such a low mass for theMilky Way Galaxy is in good agreement with estimates from the kinematics ofhalo stars and from the satellite galaxies (once Leo I is removed from thesample). It entirely removes the "Too Big To Fail Problem".

"Skinny Milky Way, Please", says Sagittarius