Results of the summarizing process for the arXiv paper: 2309.07834v1

We present the survey design and initial results of the ALMA Cycle 9 program of DUALZ, which aims to establish a joint ALMA and JWST public legacy field targeting the massive galaxy cluster Abell 2744. The DUALZ program features a contiguous $4'\times6'$ ALMA 30-GHz-wide mosaic in Band 6, covering areas with surface brightness $\mu>2$ down to a sensitivity of $\sigma=32.7$ $\mu$Jy. Through a blind search, we have identified 69 dust continuum sources at signal-to-noise ratio (S/N) greater than or equal to 5.0. These sources have a median redshift of $z=2.30$ and an intrinsic flux at 1.2 mm wavelength ($S_{\rm 1.2mm}^{\rm int}$) of $0.24$ mJy. Of these sources, 27 have been spectroscopically confirmed using the latest NIRSpec observations, while photometric redshift estimates are available for the remaining sources based on comprehensive data from \hst, NIRCam, and ALMA. In addition to the continuum sources, we have also identified a \cii158 $\mu$m line emitter at redshift $z=6.3254\pm0.0004$, which has been confirmed through NIRSpec spectroscopy. The counterparts of the 1.2-mm continuum sources observed with NIRCam exhibit undisturbed morphologies, indicating that triggers for faint millimeter emission are less catastrophic than mergers. We have also discovered eight \hst-dark galaxies and two JWST-dark galaxy candidates among the ALMA continuum sources as well as marginal dust emission from an X-ray-detected galaxy at a spectroscopic redshift of $z_{\rm spec}=10.07$, suggesting active coevolution between its central black hole and host galaxy up to high redshifts ($z\sim10$). We have assessed the infrared luminosity function up to this redshift range and found it consistent with predictions from galaxy formation models.

• ALMA Cycle 9 program of DUALZ aims to establish a joint ALMA and JWST public legacy field targeting the massive galaxy cluster Abell 2744
• DUALZ program features a contiguous $4'\times6'$ ALMA 30-GHz-wide mosaic in Band 6
• Identified 69 dust continuum sources with S/N greater than or equal to 5.0, with median redshift of $z=2.30$ and intrinsic flux at 1.2 mm wavelength ($S_{\rm 1.2mm}^{\rm int}$) of $0.24$ mJy
• Spectroscopically confirmed 27 sources using NIRSpec observations, while photometric redshift estimates available for remaining sources based on \hst, NIRCam, and ALMA data
• Discovered a \cii158 $\mu$m line emitter at redshift $z=6.3254\pm0.0004$, confirmed through NIRSpec spectroscopy
• Observed undisturbed morphologies in counterparts of the observed continuum sources with NIRCam, indicating less catastrophic triggers for faint millimeter emission compared to mergers
• Discovered eight \hst-dark galaxies and two JWST-dark galaxy candidates among the ALMA continuum sources
• Detected marginal dust emission from an X-ray-detected galaxy at a spectroscopic redshift of $z_{\rm spec}=10.07$, suggesting active coevolution between its central black hole and host galaxy up to high redshifts ($z\sim10$)
• Assessed infrared luminosity function up to this redshift range and found it consistent with predictions from galaxy formation models

The ALMA Cycle 9 program of DUALZ is a project that wants to study a big group of galaxies called Abell 2744 using two telescopes, ALMA and JWST. They made a picture of the galaxies using ALMA and found 69 sources of dust in them. They also used another telescope called NIRSpec to confirm the existence of 27 sources and estimate the distance of the others. They found a special kind of light called \\cii158 $\\mu$m coming from one galaxy at a very far distance. They also saw that some galaxies look normal even though they have dust inside them. They found eight galaxies that are hard to see with regular telescopes and two more that will be studied by JWST in the future. They also found dust emission from a galaxy that has an active black hole in it, even though it is very far away. Finally, they looked at how many bright infrared lights there are in these galaxies and compared it to what they expected based on models."

Exploring Abell 2744 with ALMA and JWST: DUALZ Program Initial Results

The massive galaxy cluster Abell 2744, located in the constellation of Sculptor, has been the focus of a joint ALMA and JWST public legacy field program called DUALZ. This survey design aims to explore this region of space through a contiguous $4'\times6'$ ALMA 30-GHz-wide mosaic in Band 6. The survey covers areas with surface brightness $\mu>2$, reaching down to a sensitivity of $\sigma=32.7$ $\mu$Jy.

Blind Search Identifies 69 Dust Continuum Sources

Through a blind search, 69 dust continuum sources have been identified at signal-to-noise ratio (S/N) greater than or equal to 5.0. These sources have an average redshift of $z=2.30$ and an intrinsic flux at 1.2 mm wavelength ($S_{\rm 1.2mm}^{\rm int}$) of $0.24$ mJy each on average. Of these sources, 27 have been spectroscopically confirmed using NIRSpec observations while photometric redshift estimates are available for the remaining sources based on comprehensive data from \hst, NIRCam, and ALMA observations.

Line Emitter Confirmed Through Spectroscopy

In addition to the continuum sources, one \cii158 $\mu$m line emitter was identified at redshift $z=6.3254\pm0