A quasar-anchored protocluster at z = 6.6 in the ASPIRE survey: I. properties of (O iii) emitters in a 10 Mpc overdensity structure
A SPectroscopic survey of bIased halos in the Reionization Era is a quasar legacy survey primarily using JWST to target a sample of 25 z > 6 quasars with NIRCam slitless spectroscopy and imaging. The first study in this series found evidence of a strong overdensity of galaxies around J0305−3150,...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2025 March 10
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| In: |
The astrophysical journal
Year: 2025, Volume: 981, Issue: 2, Pages: 1-15 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/adb1bd |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.3847/1538-4357/adb1bd Verlag, kostenfrei, Volltext: https://dx.doi.org/10.3847/1538-4357/adb1bd 
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| Author Notes: | Jaclyn B. Champagne, Feige Wang, Haowen Zhang, Jinyi Yang, Xiaohui Fan, Joseph F. Hennawi, Fengwu Sun, Eduardo Bañados, Sarah E.I. Bosman, Tiago Costa, Anna-Christina Eilers, Ryan Endsley, Xiangyu Jin, Hyunsung D. Jun, Mingyu Li, Xiaojing Lin, Weizhe Liu, Federica Loiacono, Alessandro Lupi, Chiara Mazzucchelli, Maria Pudoka, Klaudia Protušovà, Sofía Rojas-Ruiz, Wei Leong Tee, Maxime Trebitsch, Bram P. Venemans, Ming-Yang Zhuang, and Siwei Zou |
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| 245 | 1 | 2 | |a A quasar-anchored protocluster at z = 6.6 in the ASPIRE survey |b I. properties of (O iii) emitters in a 10 Mpc overdensity structure |c Jaclyn B. Champagne, Feige Wang, Haowen Zhang, Jinyi Yang, Xiaohui Fan, Joseph F. Hennawi, Fengwu Sun, Eduardo Bañados, Sarah E.I. Bosman, Tiago Costa, Anna-Christina Eilers, Ryan Endsley, Xiangyu Jin, Hyunsung D. Jun, Mingyu Li, Xiaojing Lin, Weizhe Liu, Federica Loiacono, Alessandro Lupi, Chiara Mazzucchelli, Maria Pudoka, Klaudia Protušovà, Sofía Rojas-Ruiz, Wei Leong Tee, Maxime Trebitsch, Bram P. Venemans, Ming-Yang Zhuang, and Siwei Zou |
| 246 | 3 | 3 | |a A quasar-anchored protocluster at z equal 6.6 in the ASPIRE survey |
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| 500 | |a Im Titel erscheint "O iii" in eckigen Klammern | ||
| 500 | |a Online verfügbar: 04. März 2025 | ||
| 500 | |a Gesehen am 15.09.2025 | ||
| 520 | |a A SPectroscopic survey of bIased halos in the Reionization Era is a quasar legacy survey primarily using JWST to target a sample of 25 z > 6 quasars with NIRCam slitless spectroscopy and imaging. The first study in this series found evidence of a strong overdensity of galaxies around J0305−3150, a luminous quasar at z = 6.61, within a single NIRCam pointing obtained in JWST Cycle 1. Here we present the first results of a JWST Cycle 2 mosaic that covers 35 arcmin2 with NIRCam imaging/wide-field slitless spectroscopy of the same field to investigate the spatial extent of the putative protocluster. The F356W grism data target [O iii]+Hβ at 5.3 < z < 7 and reveal a population of 124 line emitters down to a flux limit of 1.2 × 10−18 erg s−1 cm−2. Fifty-three of these galaxies lie at 6.5 < z < 6.8 spanning 10 cMpc on the sky, corresponding to an overdensity within a 2500 cMpc3 volume of 12.5 ± 2.6, anchored by the quasar. Comparing to the [O iii] luminosity function from the Emission line galaxies and Intergalactic Gas in the Epoch of Reionization project, we find a dearth of faint [O iii] emitters at log(L/erg s−1) < 42.3, which we suggest is consistent with either bursty star formation causing galaxies to scatter around the grism detection limit or modest suppression from quasar feedback. While we find a strong filamentary overdensity of [O iii] emitters consistent with a protocluster, we suggest that we could be insensitive to a population of older, more massive Lyman break galaxies with weak nebular emission on scales >10 cMpc. | ||
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