PASSAGES: The Discovery of a Strongly Lensed Protocluster Core Candidate at Cosmic Noon
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917980559900672 |
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| author | Foo, Nicholas Harrington, Kevin C. Frye, Brenda Kamieneski, Patrick S. Yun, Min S. Pascale, Massimo Yoon, Ilsang Noble, Allison Windhorst, Rogier A. Cohen, Seth H. Lowenthal, James D. Kaasinen, Melanie Pampliega, Belén Alcalde Liu, Daizhong Cooper, Olivia Diaz, Carlos Garcia Diaz, Anastasio Diego, Jose Garuda, Nikhil Jiménez-Andrade, Eric F. Leimbach, Reagen Vishwas, Amit Wang, Q. Daniel Zhou, Dazhi Zitrin, Adi |
| author_facet | Foo, Nicholas Harrington, Kevin C. Frye, Brenda Kamieneski, Patrick S. Yun, Min S. Pascale, Massimo Yoon, Ilsang Noble, Allison Windhorst, Rogier A. Cohen, Seth H. Lowenthal, James D. Kaasinen, Melanie Pampliega, Belén Alcalde Liu, Daizhong Cooper, Olivia Diaz, Carlos Garcia Diaz, Anastasio Diego, Jose Garuda, Nikhil Jiménez-Andrade, Eric F. Leimbach, Reagen Vishwas, Amit Wang, Q. Daniel Zhou, Dazhi Zitrin, Adi |
| contents | Investigating the processes by which galaxies rapidly build up their stellar mass during the peak of their star formation ($z=2$--$3$) is crucial to advancing our understanding of the assembly of large-scale structures. We report the discovery of one of the most gas- and dust-rich protocluster core candidates, PJ0846+15 (J0846), from the Planck All-Sky Survey to Analyze Gravitationally lensed Extreme Starbursts (PASSAGES) sample. The exceedingly high total apparent star formation rate of up to ($μ$SFR) $\sim 93600\,\mathrm{M}_\odot\,\text{yr}^{-1}$ is a result of a foreground cluster lens magnifying at least 11 dusty star-forming galaxies between $z=2.660$--$2.669$. Atacama Large Millimeter Array (ALMA) observations revealed 18 CO(3--2) emission-line detections, some of which are multiply-imaged systems, lensed by a foreground cluster at $z=0.77$. We present the first multi-wavelength characterization of this field, constructing a lens model that predicts that these 11 systems (magnification factor, $μ\simeq1.5$--$25$) are contained within a projected physical extent of $280\times150$ kpc, with a velocity dispersion of $σ_{v}=246\pm72$ km s$^{-1}$ and a total intrinsic star formation rate of up to (SFR) $\sim10400\,\mathrm{M}_\odot\,\text{yr}^{-1}$. J0846 is one of the most unique, lensed, protocluster core candidates ever reported, and offers a magnified glimpse into the rapid buildup of massive local galaxy clusters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_05617 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | PASSAGES: The Discovery of a Strongly Lensed Protocluster Core Candidate at Cosmic Noon Foo, Nicholas Harrington, Kevin C. Frye, Brenda Kamieneski, Patrick S. Yun, Min S. Pascale, Massimo Yoon, Ilsang Noble, Allison Windhorst, Rogier A. Cohen, Seth H. Lowenthal, James D. Kaasinen, Melanie Pampliega, Belén Alcalde Liu, Daizhong Cooper, Olivia Diaz, Carlos Garcia Diaz, Anastasio Diego, Jose Garuda, Nikhil Jiménez-Andrade, Eric F. Leimbach, Reagen Vishwas, Amit Wang, Q. Daniel Zhou, Dazhi Zitrin, Adi Astrophysics of Galaxies Investigating the processes by which galaxies rapidly build up their stellar mass during the peak of their star formation ($z=2$--$3$) is crucial to advancing our understanding of the assembly of large-scale structures. We report the discovery of one of the most gas- and dust-rich protocluster core candidates, PJ0846+15 (J0846), from the Planck All-Sky Survey to Analyze Gravitationally lensed Extreme Starbursts (PASSAGES) sample. The exceedingly high total apparent star formation rate of up to ($μ$SFR) $\sim 93600\,\mathrm{M}_\odot\,\text{yr}^{-1}$ is a result of a foreground cluster lens magnifying at least 11 dusty star-forming galaxies between $z=2.660$--$2.669$. Atacama Large Millimeter Array (ALMA) observations revealed 18 CO(3--2) emission-line detections, some of which are multiply-imaged systems, lensed by a foreground cluster at $z=0.77$. We present the first multi-wavelength characterization of this field, constructing a lens model that predicts that these 11 systems (magnification factor, $μ\simeq1.5$--$25$) are contained within a projected physical extent of $280\times150$ kpc, with a velocity dispersion of $σ_{v}=246\pm72$ km s$^{-1}$ and a total intrinsic star formation rate of up to (SFR) $\sim10400\,\mathrm{M}_\odot\,\text{yr}^{-1}$. J0846 is one of the most unique, lensed, protocluster core candidates ever reported, and offers a magnified glimpse into the rapid buildup of massive local galaxy clusters. |
| title | PASSAGES: The Discovery of a Strongly Lensed Protocluster Core Candidate at Cosmic Noon |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2504.05617 |