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/

Zendy Plus

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

Zendy Tools

Zendy Open

We present multi-band observations of an extremely dusty star-forming lensedgalaxy (HERS1) at $z=2.553$. High-resolution maps of \textit{HST}/WFC3, SMA,and ALMA show a partial Einstein-ring with a radius of$\sim$3$^{\prime\prime}$. The deeper HST observations also show the presence ofa lensing arc feature associated with a second lens source, identified to be atthe same redshift as the bright arc based on a detection of the [NII] 205$\mu$memission line with ALMA. A detailed model of the lensing system is constructedusing the high-resolution HST/WFC3 image, which allows us to study the sourceplane properties and connect rest-frame optical emission with properties of thegalaxy as seen in sub-millimeter and millimeter wavelengths. Corrected forlensing magnification, the spectral energy distribution fitting results yieldan intrinsic star formation rate of about $1000\pm260$ ${\rmM_{\odot}}$yr$^{-1}$, a stellar mass ${\rm M_*}=4.3^{+2.2}_{-1.0}\times10^{11}{\rm M_{\odot}}$, and a dust temperature ${\rm T}_{\rm d}=35^{+2}_{-1}$ K. Theintrinsic CO emission line ($J_{\rm up}=3,4,5,6,7,9$) flux densities and COspectral line energy distribution are derived based on the velocity-dependentmagnification factors. We apply a radiative transfer model using the largevelocity gradient method with two excitation components to study the gasproperties. The low-excitation component has a gas density $n_{\rmH_2}=10^{3.1\pm0.6}$ cm$^{-3}$ and kinetic temperature ${\rm T}_{\rmk}=19^{+7}_{-5}$ K and a high-excitation component has $n_{\rmH_2}=10^{2.8\pm0.3}$ cm$^{-3}$ and ${\rm T}_{\rm k}=550^{+260}_{-220}$ K.Additionally, HERS1 has a gas fraction of about $0.4\pm0.2$ and is expected tolast 250 Myr. These properties offer a detailed view of a typicalsub-millimeter galaxy during the peak epoch of star-formation activity.

Massive molecular gas reservoir in a luminous sub-millimeter galaxy during cosmic noon