Oral Presentation

A comprehensive report of the MAMMOTH-Subaru survey detecting LAEs and LABs traced by IGM/AGN at Cosmic Noon

Author(s): Yongming Liang (ICRR/U. Tokyo), Nobunari Kashikawa (U. Tokyo), Zheng Cai (Tsinghua U.), Haibin Zhang (Tsinghua U.), Mingyu Li (Tsinghua U.), Ke Ma (Tsinghua U.), Xiaohui Fan (Steward/U. Arizona), Masami Ouchi (NAOJ/ICRR), Qiong Li (U. Michigan) et al.

Presenter: Yongming Liang (University of Tokyo/ICRR)

The Mapping the Most Massive Overdensity Through Hydrogen (MAMMOTH) project proposes to use groups of strong absorbers in the intergalactic medium (IGM), which are indicated by the SDSS/eBOSS quasar spectra, as the tracer of the underlying large-scale IGM environment. We perform NB387/NB400 and g-band imaging with Subaru/HSC to detect z=2.2/z=2.3 LAEs in the environments of dense IGM and/or grouping quasars using this novel technique, and the project is thus called MAMMOTH-Subaru survey. This survey provides us with narrowbands and g-band images in eight fields covering the sky area of ~12 deg^2. Therefore, we construct a catalog with >3,000 Lyman-alpha emitters (LAEs) and >100 Lyman-alpha blobs (LABs) in dense IGM regions at the Cosmic Noon. The unprecedented sample is impressive in both the number of galaxies and large survey areas with rich sightlines toward SDSS quasars. It allows us to perform unique discussions on the variation of LAE-IGM HI correlation (Liang et al. in prep.), the effect of cosmic variance on the LAE luminosity function (Ma et al. in prep.), the detection of unique LAB traced by IGM (Li et al. in prep.), the environment of LABs and their clustering (Zhang et al. in prep. a), and the diffuse Lya emission extended to~200 kpc by stacking the numerous LAEs (Zhang et al. in prep. b). This talk will comprehensively summarize the latest results from this series of works in the MAMMOTH-Subaru.