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 have observed two of the six Frontier Fields galaxy clusters, MACSJ0416.1-2403 and Abell 2744, using the Gemini Multi-Conjugate Adaptive OpticsSystem (GeMS) and the Gemini South Adaptive Optics Imager (GSAOI). With0.08"-0.10" FWHM our data are nearly diffraction-limited over a 100"x100" widearea. GeMS/GSAOI complements the Hubble Space Telescope (HST) redwards of1.6microns with twice the angular resolution. We reach a 5 sigma depth of Ks =25.6 mag (AB) for compact sources. In this paper we describe the observations,the data processing and the initial public data release. We provide fullycalibrated, co-added images matching the native GSAOI pixel scale as well asthe larger plate scales of the HST release, adding to the legacy value of theFrontier Fields. Our work demonstrates that even for fields at high galacticlatitude, where natural guide stars are rare, current multi-conjugated adaptiveoptics technology at 8m-telescopes has opened a new window on the distantUniverse. Observations of a third Frontier Field, Abell 370, are planned.

Gemini Frontier Fields: Wide-field Adaptive Optics $K_s$-band Imaging of the Galaxy Clusters MACS J0416.1-2403 and Abell 2744