A Quasar-Anchored Protocluster at z=6.6 in the ASPIRE Survey: I. Properties of [OIII] Emitters in a 10 Mpc Overdensity Structure

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; Sofia Rojas-Ruiz; Wei Leong Tee; Maxime Trebitsch; Bram P. Venemans; Ming-Yang Zhuang; Siwei Zou

arXiv · 2410.03826

A Quasar-Anchored Protocluster at z=6.6 in the ASPIRE Survey: I. Properties of [OIII] Emitters in a 10 Mpc Overdensity Structure

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Abstract

ASPIRE (A SPectroscopic survey of bIased halos in the Reionization Era) is a quasar legacy survey primarily using \textit{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 arcmin$^2$ with NIRCam imaging/WFSS of the same field to investigate the spatial extent of the putative protocluster. The F356W grism data targets [OIII]+H$\beta$ at $5.3 10$ cMpc.

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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, Sofia Rojas-Ruiz, Wei Leong Tee, Maxime Trebitsch, Bram P. Venemans, Ming-Yang Zhuang, Siwei Zou. 2024-10-04. A Quasar-Anchored Protocluster at z=6.6 in the ASPIRE Survey: I. Properties of [OIII] Emitters in a 10 Mpc Overdensity Structure. https://arxiv.org/abs/2410.03826

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