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 a sample of four emission-line galaxies at $z=6.11-6.35$ that wereserendipitously discovered using the commissioning data for the JWST/NIRCamwide-field slitless spectroscopy (WFSS) mode. One of them (at $z=6.11$) hasbeen reported previously while the others are new discoveries. These sourcesare selected by the secure detections of both [O III] $\lambda$5007 andH$\alpha$ lines with other fainter lines tentatively detected in some cases(e.g., [O II] $\lambda$3727, [O III] $\lambda$4959). In the [O III]/H$\beta$ -[N II]/H$\alpha$ Baldwin-Phillips-Terlevich diagram, these galaxies occupy thesame parameter space as that of $z\sim2$ star-forming galaxies, indicating thatthey have been enriched rapidly to sub-solar metallicities ($\sim$0.4$Z_{\odot}$), similar to galaxies with comparable stellar masses at much lowerredshifts. The detection of strong H$\alpha$ lines suggests a higher ionizingphoton production efficiency within galaxies in the early Universe. We findbrightening of the [O III] $\lambda$5007 line luminosity function (LF) from$z=3$ to 6, and weak or no redshift evolution of the H$\alpha$ line LF from$z=2$ to 6. Both LFs are under-predicted at $z\sim6$ by a factor of $\sim$10 incertain cosmological simulations. This further indicates a global Ly$\alpha$photon escape fraction of 7-10% at $z\sim6$, slightly lower than previousestimates through the comparison of the UV-derived star-formation rate densityand Ly$\alpha$ luminosity density. Our sample recovers $66^{+128}_{-44}$% of$z=6.0-6.6$ galaxies in the survey volume with stellar masses greater than$5\times10^8$ $M_{\odot}$, suggesting the ubiquity of strong H$\alpha$ and [OIII] line emitters in the Epoch of Reionization, which will be furtheruncovered in the era of JWST.

astrophysical journal/the astrophysical journal

First Sample of H$\alpha$+[O III] $\lambda$5007 Line Emitters at $z > 6$  Through JWST/NIRCam Slitless Spectroscopy: Physical Properties and Line  Luminosity Functions