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 present the rest-1500\AA\ UV luminosity functions (LF) for star-forminggalaxies during the cosmic \textit{high noon} -- the peak of cosmic starformation rate at $1.5<z<3$. We use deep NUV imaging data obtained as part ofthe \textit{Hubble} Ultra-Violet Ultra Deep Field (UVUDF) program, along withexisting deep optical and NIR coverage on the HUDF. We select F225W, F275W andF336W dropout samples using the Lyman break technique, along with samples inthe corresponding redshift ranges selected using photometric redshifts andmeasure the rest-frame UV LF at $z\sim1.7,2.2,3.0$ respectively, using themodified maximum likelihood estimator. We perform simulations to quantify thesurvey and sample incompleteness for the UVUDF samples to correct the effectivevolume calculations for the LF. We select galaxies down to$M_{UV}=-15.9,-16.3,-16.8$ and fit a faint-end slope of$\alpha=-1.20^{+0.10}_{-0.13}, -1.32^{+0.10}_{-0.14}, -1.39^{+0.08}_{-0.12}$ at$1.4<z<1.9$, $1.8<z<2.6$, and $2.4<z<3.6$, respectively. We compare the starformation properties of $z\sim2$ galaxies from these UV observations withresults from H\alpha\ and UV$+$IR observations. We find a lack of high SFRsources in the UV LF compared to the H\alpha\ and UV$+$IR, likely due to dustySFGs not being properly accounted for by the generic $IRX-\beta$ relation usedto correct for dust. We compute a volume-averaged UV-to-H\alpha\ ratio by\textit{abundance matching} the rest-frame UV LF and H\alpha\ LF. We find anincreasing UV-to-H\alpha\ ratio towards low mass galaxies ($M_\star \lesssim5\times10^9$ M$_\odot$). We conclude that this could be due to a largercontribution from starbursting galaxies compared to the high-mass end.

UVUDF: UV Luminosity Functions at the cosmic high-noon