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

Exploiting the sensitivity and spatial resolution of the Atacama LargeMillimeter/submillimeter Array (ALMA), we have studied the morphology and thephysical scale of the interstellar medium - both gas and dust - in SGP38326, anunlensed pair of interacting starbursts at $z= 4.425$. SGP38326 is the mostluminous star bursting system known at $z > 4$ with an IR-derived ${\rm SFR\sim 4300 \,} M_\odot \, {\rm yr}^{-1}$. SGP38326 also contains a molecular gasreservoir among the most massive ever found in the early Universe, and it isthe likely progenitor of a massive, red-and-dead elliptical galaxy at $z \sim3$. Probing scales of $\sim 0.1"$ or $\sim 800 \, {\rm pc}$ we find that thesmooth distribution of the continuum emission from cool dust grains contrastswith the more irregular morphology of the gas, as traced by the [CII] finestructure emission. The gas is also extended over larger physical scales thanthe dust. The velocity information provided by the resolved [CII] emissionreveals that the dynamics of the two components of SGP38326 are compatible withdisk-like, ordered rotation, but also reveals an ISM which is turbulent andunstable. Our observations support a scenario where at least a subset of themost distant extreme starbursts are highly dissipative mergers of gas-richgalaxies.

Witnessing the birth of the red sequence: ALMA high-resolution imaging of [CII] and dust in two interacting ultra-red starbursts at z = 4.425