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 past decade has seen impressive progress in the detection of $z>7$galaxies with the Hubble Space Telescope, however little is known about theirproperties. The James Webb Space Telescope will revolutionise the high-$z$field by providing NIR (i.e., rest-frame optical) data of unprecedented depthand spatial resolution. Measuring galaxy quantities such as resolved stellarages or gas metallicity gradients traditionally requires spectroscopy, asbroad-band imaging filters are generally too coarse to fully isolatediagnostics such as the 4000 \r{A} (rest-frame) break, continuum emission fromaged stars, and key emission lines (e.g., [OII], [OIII], H$\beta$). However, inthis paper, we show that adding NIRCam images through a strategically chosenmedium-band filter to common wide-band filters sets adopted by ERS and GTOprograms delivers tighter constraints on these galactic properties. Toconstrain the choice of filter, we perform a systematic investigation of whichcombinations of wide-band filters from ERS and GTO programs and singlemedium-band filters offer the tightest constraints on several galaxy propertiesat redshifts $z\sim7-11$. We employ the JAGUAR extragalactic catalogs toconstruct statistical samples of physically-motivated mock photometry andconduct SED-fitting procedures to evaluate the accuracy of galaxy property (andphoto-$z$) recovery with a simple star-formation history model. We find thatadding $>4.1 \mu$m medium filters at comparable depth to the broad-band filterscan significantly improve photo-$z$s and yield close to order-of-magnitudeimprovements in the determination of quantities such as stellar ages,metallicities, SF-related quantities and emission line fluxes at $z\sim8$. Forresolved sources, the proposed approach enables spatially-resolveddetermination of these quantities that would be prohibitive with slitspectroscopy.

Improving $z\sim7-11$ Galaxy Property Estimates with JWST/NIRCam Medium-Band Photometry