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 the results of 300 pc resolution ALMA imaging of the [OIII] 88$\mu$m line and dust continuum emission from a $z = 8.312$ Lyman break galaxyMACS0416_Y1. The velocity-integrated [OIII] emission has three peaks which arelikely associated with three young stellar clumps of MACS0416_Y1, while thechannel map shows a complicated velocity structure with little indication of aglobal velocity gradient unlike what was found in [CII] 158 $\mu$m at a largerscale, suggesting random bulk motion of ionized gas clouds inside the galaxy.In contrast, dust emission appears as two individual clumps apparentlyseparating or bridging the [OIII]/stellar clumps. The cross correlationcoefficient between dust and ultraviolet-related emission (i.e., [OIII] andultraviolet continuum) is unity on a galactic scale, while it drops at < 1 kpc,suggesting well mixed geometry of multi-phase interstellar media on sub-kpcscales. If the cutoff scale characterizes different stages of star formation,the cutoff scale can be explained by gravitational instability of turbulentgas. We also report on a kpc-scale off-center cavity embedded in the dustcontinuum image. This could be a superbubble producing galactic-scale outflows,since the energy injection from the 4 Myr starburst suggested by a spectralenergy distribution analysis is large enough to push the surrounding mediacreating a kpc-scale cavity.

The 300 pc resolution imaging of a z = 8.31 galaxy: Turbulent ionized gas and potential stellar feedback 600 million years after the Big Bang