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Pinpointing the cosmic web between massive galaxy clusters I. The incidence of HI and OVI as WHIM tracers
Karen Martínez-Acosta, Nicolas Tejos, Ismael Pessa +6
At redshift z<1, the CDM paradigm predicts that 40-50\% of baryons reside in the warm-hot intergalactic medium (WHIM) within cosmic web filaments. Characterizing the physi…
PIFFLE: Characterizing the Foreground Contributions from 4 Decades in Halo Mass to the FRB20230907D Dispersion Measure
Qi Guo, Khee-Gan Lee, Sunil Simha +10
We characterize the foreground environment of FRB20230907D, localized to a galaxy at , which has an observed dispersion measure of ${\rm DM}_{\rm obs}=1031~{\rm pc~cm^{-3}…
Evidence for Enhancement in the Rate of Fast Radio Bursts Toward Galaxy Clusters
Mawson W. Sammons, Airene Ahuja, Matt Dobbs +25
Massive galaxy clusters can introduce gravitational lensing and populations of suppressed star formation member galaxies into the line of sight, potentially changing the distributi…
Measurement of the Dispersion$\unicode{x2013}$Galaxy Cross-Power Spectrum with the Second CHIME/FRB Catalog
Haochen Wang, Kiyoshi Masui, Shion Andrew +18
The dispersion of extragalactic fast radio bursts (FRBs) can serve as a powerful probe of the diffuse plasma between and surrounding galaxies, which contains most of the Universe's…
Measuring the Mean Free Path of HI Ionizing Photons at with DESI Y1 Quasars
Anning Gao, Jason X. Prochaska, Zheng Cai +31
The mean free path of ionizing photons () in the intergalactic medium (IGM) is a crucial quantity in modelling the ionization state of IGM and the extragalact…
Modeling the Cosmic Dispersion Measure in the D < 120 Mpc Local Universe
Yuxin Huang, Khee-Gan Lee, Noam I. Libeskind +3
The Local Universe (D < 120 Mpc) has been intensely studied for decades, with highly complete galaxy redshift surveys now publicly available. These data have driven density reconst…
A census of baryons in the Universe from localized fast radio bursts
J. -P. Macquart, J. X. Prochaska, M. McQuinn +13
More than three quarters of the baryonic content of the Universe resides in a highly diffuse state that is difficult to observe, with only a small fraction directly observed in gal…
The Stacked Lyman-Alpha Emission Profile from the Circum-Galactic Medium of z~2 Quasars
Fabrizio Arrigoni Battaia, Joseph F. Hennawi, Sebastiano Cantalupo +1
In the context of the FLASHLIGHT survey, we obtained deep narrow band images of 15 quasars with GMOS on Gemini-South in an effort to measure Ly emission from circum- an…
Towards the statistical detection of the warm-hot intergalactic medium in inter-cluster filaments of the cosmic web
Nicolas Tejos, J. Xavier Prochaska, Neil H. M. Crighton +6
Modern analyses of structure formation predict a universe tangled in a 'cosmic web' of dark matter and diffuse baryons. These theories further predict that at low-z, a significant…
Lyman-alpha Forest Tomography from Background Galaxies: The First Megaparsec-Resolution Large-Scale Structure Map at z>2
Khee-Gan Lee, Joseph F. Hennawi, Casey Stark +21
We present the first observations of foreground Lyman- forest absorption from high-redshift galaxies, targeting 24 star-forming galaxies (SFGs) with within a $5'…