Early Results from GLASS-JWST. XIV. A Spectroscopically Confirmed Protocluster 650 Million Years after the Big Bang
Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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Early Results from GLASS-JWST. XIV. A Spectroscopically Confirmed Protocluster 650 Million Years after the Big Bang. / Morishita, Takahiro; Roberts-Borsani, Guido; Treu, Tommaso; Brammer, Gabriel; Mason, Charlotte A.; Trenti, Michele; Vulcani, Benedetta; Wang, Xin; Acebron, Ana; Bahe, Yannick; Bergamini, Pietro; Boyett, Kristan; Bradac, Marusa; Calabro, Antonello; Castellano, Marco; Chen, Wenlei; De Lucia, Gabriella; Filippenko, Alexei V.; Fontana, Adriano; Glazebrook, Karl; Grillo, Claudio; Henry, Alaina; Jones, Tucker; Kelly, Patrick L.; Koekemoer, Anton M.; Leethochawalit, Nicha; Lu, Ting-Yi; Marchesini, Danilo; Mascia, Sara; Mercurio, Amata; Merlin, Emiliano; Metha, Benjamin; Nanayakkara, Themiya; Nonino, Mario; Paris, Diego; Pentericci, Laura; Rosati, Piero; Santini, Paola; Strait, Victoria; Vanzella, Eros; Windhorst, Rogier A.; Xie, Lizhi.
I: Astrophysical Journal Letters, Bind 947, Nr. 2, 24, 01.04.2023.Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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T1 - Early Results from GLASS-JWST. XIV. A Spectroscopically Confirmed Protocluster 650 Million Years after the Big Bang
AU - Morishita, Takahiro
AU - Roberts-Borsani, Guido
AU - Treu, Tommaso
AU - Brammer, Gabriel
AU - Mason, Charlotte A.
AU - Trenti, Michele
AU - Vulcani, Benedetta
AU - Wang, Xin
AU - Acebron, Ana
AU - Bahe, Yannick
AU - Bergamini, Pietro
AU - Boyett, Kristan
AU - Bradac, Marusa
AU - Calabro, Antonello
AU - Castellano, Marco
AU - Chen, Wenlei
AU - De Lucia, Gabriella
AU - Filippenko, Alexei V.
AU - Fontana, Adriano
AU - Glazebrook, Karl
AU - Grillo, Claudio
AU - Henry, Alaina
AU - Jones, Tucker
AU - Kelly, Patrick L.
AU - Koekemoer, Anton M.
AU - Leethochawalit, Nicha
AU - Lu, Ting-Yi
AU - Marchesini, Danilo
AU - Mascia, Sara
AU - Mercurio, Amata
AU - Merlin, Emiliano
AU - Metha, Benjamin
AU - Nanayakkara, Themiya
AU - Nonino, Mario
AU - Paris, Diego
AU - Pentericci, Laura
AU - Rosati, Piero
AU - Santini, Paola
AU - Strait, Victoria
AU - Vanzella, Eros
AU - Windhorst, Rogier A.
AU - Xie, Lizhi
PY - 2023/4/1
Y1 - 2023/4/1
N2 - 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 greater than or similar to 20x greater than a random volume, they do not show strong Ly alpha emission. We place 2 sigma upper limits on the rest-frame equivalent width alpha emission, we constrain the volume-averaged neutral fraction of hydrogen in the intergalactic medium to be x (HI) > 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 greater than or similar to 4 x 10(11) M (circle dot). 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 similar to 2 x 10(15) M (circle dot), 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
AB - 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 greater than or similar to 20x greater than a random volume, they do not show strong Ly alpha emission. We place 2 sigma upper limits on the rest-frame equivalent width alpha emission, we constrain the volume-averaged neutral fraction of hydrogen in the intergalactic medium to be x (HI) > 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 greater than or similar to 4 x 10(11) M (circle dot). 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 similar to 2 x 10(15) M (circle dot), 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
KW - SIMILAR-TO 8
KW - IONIZED BUBBLE
KW - GALAXY PROTOCLUSTERS
KW - COSMIC REIONIZATION
KW - PHYSICAL-PROPERTIES
KW - NEUTRAL FRACTION
KW - ALPHA EMISSION
KW - SURVEY DESIGN
KW - I.
KW - EVOLUTION
U2 - 10.3847/2041-8213/acb99e
DO - 10.3847/2041-8213/acb99e
M3 - Letter
VL - 947
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 2
M1 - 24
ER -
ID: 355102346