دورية أكاديمية
Early Results from GLASS-JWST. XIV. A Spectroscopically Confirmed Protocluster 650 Million Years after the Big Bang
| العنوان: | Early Results from GLASS-JWST. XIV. A Spectroscopically Confirmed Protocluster 650 Million Years after the Big Bang |
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| المؤلفون: | Takahiro Morishita, Guido Roberts-Borsani, Tommaso Treu, Gabriel Brammer, Charlotte A. Mason, Michele Trenti, Benedetta Vulcani, Xin Wang, Ana Acebron, Yannick Bahé, Pietro Bergamini, Kristan Boyett, Marusa Bradac, Antonello Calabrò, Marco Castellano, Wenlei Chen, Gabriella De Lucia, Alexei V. Filippenko, Adriano Fontana, Karl Glazebrook, Claudio Grillo, Alaina Henry, Tucker Jones, Patrick L. Kelly, Anton M. Koekemoer, Nicha Leethochawalit, Ting-Yi Lu, Danilo Marchesini, Sara Mascia, Amata Mercurio, Emiliano Merlin, Benjamin Metha, Themiya Nanayakkara, Mario Nonino, Diego Paris, Laura Pentericci, Piero Rosati, Paola Santini, Victoria Strait, Eros Vanzella, Rogier A. Windhorst, Lizhi Xie |
| المصدر: | The Astrophysical Journal Letters, Vol 947, Iss 2, p L24 (2023) |
| بيانات النشر: | IOP Publishing, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Astrophysics |
| مصطلحات موضوعية: | Galaxies, Galaxy clusters, Reionization, Protoclusters, Astrophysics, QB460-466 |
| الوصف: | We present the spectroscopic confirmation of a protocluster at z = 7.88 behind the galaxy cluster Abell 2744 (hereafter A2744-z7p9OD). Using JWST NIRSpec, we find seven galaxies within a projected radius of 60 kpc. Although the galaxies reside in an overdensity around ≳20× greater than a random volume, they do not show strong Ly α emission. We place 2 σ upper limits on the rest-frame equivalent width 0.45 (68% C i ). Using an empirical M _UV – M _halo relation for individual galaxies, we estimate that the total halo mass of the system is ≳4 × 10 ^11 M _⊙ . Likewise, the line-of-sight velocity dispersion is estimated to be 1100 ± 200 km s ^−1 . Using an empirical relation, we estimate the present-day halo mass of A2744-z7p9OD to be ∼2 × 10 ^15 M _⊙ , comparable to the Coma cluster. A2744-z7p9OD is the highest redshift spectroscopically confirmed protocluster to date, demonstrating the power of JWST to investigate the connection between dark-matter halo assembly and galaxy formation at very early times with medium-deep observations at |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2041-8213 2041-8205 |
| Relation: | https://doaj.org/toc/2041-8205 |
| DOI: | 10.3847/2041-8213/acb99e |
| URL الوصول: | https://doaj.org/article/4ad59ae461ed42e9a71d1601289e2496 |
| رقم الأكسشن: | edsdoj.4ad59ae461ed42e9a71d1601289e2496 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20418213 20418205 |
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| DOI: | 10.3847/2041-8213/acb99e |