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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We analyse HST WFC3/$H_{160}$-band observations of a sample of 48ALMA-detected submillimeter galaxies (SMGs) in the Extended Chandra Deep FieldSouth field, to study their stellar morphologies and sizes. We detect79$\pm$17% of the SMGs in the $H_{160}$-band imaging with a median sensitivityof 27.8 mag, and most (80%) of the non-detections are SMGs with 870$\mu$mfluxes of $S_{870} < $3 mJy. With a surface brightness limit of $\mu_H \sim $26mag arcsec$^{-2}$, we find that 82$\pm$9% of the $H_{160}$-band detected SMGsat $z =$ 1-3 appear to have disturbed morphologies, meaning they are visuallyclassified as either irregulars or interacting systems, or both. By determininga S\'ersic fit to the $H_{160}$ surface-brightness profiles we derive a medianS\'ersic index of $n = $1.2$\pm$0.3 and a median half-light radius of $r_e =$4.4$^{+1.1}_{-0.5}$ kpc for our SMGs at $z = $1-3. We also find significantdisplacements between the positions of the $H_{160}$-component and 870$\mu$memission in these systems, suggesting that the dusty star-burst regions andless-obscured stellar distribution are not co-located. We find significantdifferences in the sizes and the S\'ersic index between our $z = $2-3 SMGs and$z \sim $2 quiescent galaxies, suggesting a major transformation of the stellarlight profile is needed in the quenching processes if SMGs are progenitors ofthe red-and-dead $z\sim$2 galaxies. Given the short-lived nature of SMGs, wepostulate that the majority of the $z = $2-3 SMGs with $S_{870} \gtrsim $2 mJyare early/mid-stage major mergers.

An ALMA Survey of Submillimeter Galaxies in the Extended Chandra Deep Field South: Near-infrared morphologies and stellar sizes