Photometric IGM tomography with Subaru/HSC: the large-scale structure of Ly α emitters and IGM transmission in the COSMOS field at z ˜ 5

Autor:	Koki Kakiichi, Joseph F Hennawi, Yoshiaki Ono, Akio K Inoue, Masami Ouchi, Richard S Ellis, Romain A Meyer, Sarah I Bosman
Rok vydání:	2023
Předmět:	Space and Planetary Science Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj:	Monthly Notices of the Royal Astronomical Society. 523:1772-1798
ISSN:	1365-2966 0035-8711
DOI:	10.1093/mnras/stad1376
Popis:	We present a novel technique called "photometric IGM tomography" to map the intergalactic medium (IGM) at $z\simeq4.9$ in the COSMOS field. It utilizes deep narrow-band (NB) imaging to photometrically detect faint Ly$\alpha$ forest transmission in background galaxies across the Subaru/Hyper-Suprime Cam (HSC)'s $1.8\rm\,sq.\,deg$ field of view and locate Ly$\alpha$ emitters (LAEs) in the same cosmic volume. Using ultra-deep HSC images and Bayesian spectral energy distribution fitting, we measure the Ly$\alpha$ forest transmission at $z\simeq4.9$ along a large number ($140$) of background galaxies selected from the DEIMOS10k spectroscopic catalogue at $4.98 Comment: 27 pages, 21 figures, accepted by MNRAS, full tables available as online supplementary material
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e038cafa98b478b04e39baa664011983 https://doi.org/10.1093/mnras/stad1376 Zobrazit plný text záznamu