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

The Next Generation Virgo Cluster Survey (NGVS) is a deep $u^*giz$ surveytargeting the Virgo cluster of galaxies at 16.5~Mpc. This survey provideshigh-quality photometry over an $\sim$ 100 deg$^2$ region straddling theconstellations of Virgo and Coma Berenices. This sightline through the MilkyWay is noteworthy in that it intersects two of the most prominent substructuresin the Galactic halo: the Virgo Over-Density (VOD) and Sagittarius stellarstream (close to its bifurcation point). In this paper, we use deep $u^*gi$imaging from the NGVS to perform tomography of the VOD and Sagittarius streamusing main-sequence turnoff (MSTO) stars as a halo tracer population. The VOD,whose centroid is known to lie at somewhat lower declinations ($\alpha \sim190^\circ$, $\delta \sim -5^\circ$) than is covered by the NGVS, isnevertheless clearly detected in the NGVS footprint at distances between $\sim$8 and 25~kpc. By contrast, the Sagittarius stream is found to slice directlyacross the NGVS field at distances between 25 and 40~kpc, with a densitymaximum at $\simeq$~35~kpc. No evidence is found for new substructures beyondthe Sagittarius stream, at least out to a distance of $\sim$~90 kpc --- thelargest distance to which we can reliably trace the halo using MSTO stars. Wefind clear evidence for a distance gradient in the Sagittarius stream acrossthe $\sim 30$~deg of sky covered by the NGVS and its flanking fields. Wecompare our distance measurements along the stream to those predicted byleading stream models.

The Next Generation Virgo Cluster Survey. XIX. Tomography of Milky Way Substructures in the NGVS Footprint