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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present new measurements of the evolution of the galaxy stellar massfunctions (GSMF) and UV luminosity functions (UV LF) for galaxies from $z=6-9$within the Frontier Field cluster MACSJ0416.1-2403 and its parallel field. Toobtain these results, we derive the stellar masses of our sample by fittingsynthetic stellar population models to their observed spectral energydistribution with the inclusion of nebular emission lines. This is the deepestand farthest in distance mass function measured to date and probes down to alevel of M$_{*} = 10^{6.8}M_{\odot}$. The main result of this study is that thelow-mass end of our GSMF to these limits and redshifts appears to becomesteeper from $-1.98_{-0.07}^{+0.07}$ at $z=6$ to $-2.38_{-0.88}^{+0.72}$ at$z=9$, steeper than previously observed mass functions at slightly lowerredshifts, and we find no evidence of turnover in the mass range probed. Wefurthermore demonstrate that the UV LF for these system also appears to show asteepening at the highest redshifts, without any evidence of turnover in theluminosity range probed. Our $M_{\mathrm{UV}}-M_{*}$ relation exhibit shallowerslopes than previously observed and are in accordance with a constantmass-to-light ratio. Integrating our GSMF, we find that the stellar massdensity increases by a factor of $\sim15_{-6}^{+21}$ from $z=9$ to $z=6$. Weestimate the dust-corrected star formation rates (SFRs) to calculate thespecific star formation rates ($\mathrm{sSFR}=\mathrm{SFR/M_{*}}$) of oursample, and find that for a fixed stellar mass of $5\times10^{9}M_{\odot}$,sSFR $\propto(1+z)^{2.01\pm0.16}$. Finally, from our new measurements, weestimate the UV luminosity density ($\rho_{\textrm{UV}}$) and find that ourresults support a smooth decline of $\rho_{\textrm{UV}}$ towards highredshifts.

Evolution of the galaxy stellar mass functions and UV luminosity functions at $z=6-9$ in the Hubble Frontier Fields