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Photometric IGM tomography with Subaru/HSC: the large-scale structure of Ly α emitters and IGM transmission in the COSMOS field at z ˜ 5
- Source :
- Monthly Notices of the Royal Astronomical Society. 523:1772-1798
- Publication Year :
- 2023
- Publisher :
- Oxford University Press (OUP), 2023.
-
Abstract
- 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<br />Comment: 27 pages, 21 figures, accepted by MNRAS, full tables available as online supplementary material
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 523
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....e038cafa98b478b04e39baa664011983