Detection of z ~ 2.3 Cosmic Voids from 3D Ly α Forest Tomography in the COSMOS Field

Krolewski, Alex; Lee, Khee-Gan; White, Martin; Hennawi, Joseph F.; Schlegel, David J.; Nugent, Peter E.; Lukić, Zarija; Stark, Casey W.; Koekemoer, Anton M.; Fèvre, Olivier Le; Lemaux, Brian C.; Maier, Christian; Rich, R. Michael; Salvato, Mara; Tasca, Lidia

doi:10.3847/1538-4357/aac829

Title: Detection of z ~ 2.3 Cosmic Voids from 3D Ly α Forest Tomography in the COSMOS Field

Journal Article · 02 July 2018 · The Astrophysical Journal (Online)

DOI: https://doi.org/10.3847/1538-4357/aac829 · OSTI ID:1526532

^[1];

^[2];

^[3];

^[4];

^[2];

^[3]; Lukić, Zarija ^[2];

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^[6]; Fèvre, Olivier Le ^[7]; Lemaux, Brian C. ^[8];

^[9]; Rich, R. Michael ^[10];

^[11]; Tasca, Lidia ^[7]

Univ. of California, Berkeley, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Santa Barbara, CA (United States)
Google Inc., Moutain View, CA (United States)
Space Telescope Science Inst., Baltimore, MD (United States)
Aix-Marseille Univ., and CNRS/IN2P3, Marseille (France)
Aix-Marseille Univ., and CNRS/IN2P3, Marseille (France); Univ. of California, Davis, CA (United States)
Univ. of Vienna (Austria)
Univ. of California, Los Angeles, CA (United States)
Max Planck Inst. fur Extraterrestrische Physik, Garching (Germany)

We present the most distant detection of cosmic voids (z ~ 2.3) and the first detection of three-dimensional voids in the Lyα forest. We used a 3D tomographic map of the absorption with an effective comoving spatial resolution of 2.5 h^-1 Mpc and a volume of 3.15 × 10⁵ h³ Mpc³, which was reconstructed from moderate-resolution Keck I/LRIS spectra of 240 background Lyman-break galaxies and quasars in a 0.16 deg² footprint in the COSMOS field. Voids were detected using a spherical overdensity finder calibrated from hydrodynamical simulations of the intergalactic medium (IGM). This allows us to identify voids in the IGM corresponding to voids in the underlying matter density field, yielding a consistent volume fraction of voids in both data (19.5%) and simulations (18.2%). We fit excursion set models to the void radius function and compare the radially averaged stacked profiles of large voids (r > 5 h^-1 Mpc) to stacked voids in mock observations and the simulated density field. Comparing with 432 coeval galaxies with spectroscopic redshifts in the same volume as the tomographic map, we find that the tomography-identified voids are underdense in galaxies by 5.95σ compared to random cells.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Aeronautics and Space Administration (NASA)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1526532

Alternate ID(s):: OSTI ID: 1594744

Journal Information:: The Astrophysical Journal (Online), Journal Name: The Astrophysical Journal (Online) Journal Issue: 1 Vol. 861; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Simulating nonlinear cosmological structure formation with massive neutrinos Banerjee, Arka; Dalal, Neal Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 11 https://doi.org/10.1088/1475-7516/2016/11/015	journal	November 2016
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THE MOSFIRE DEEP EVOLUTION FIELD (MOSDEF) SURVEY: REST-FRAME OPTICAL SPECTROSCOPY FOR ∼1500 H -SELECTED GALAXIES AT $1.37\leqslant z\leqslant 3.8$ Kriek, Mariska; Shapley, Alice E.; Reddy, Naveen A. The Astrophysical Journal Supplement Series, Vol. 218, Issue 2 https://doi.org/10.1088/0067-0049/218/2/15	journal	May 2015
Testing gravity using cosmic voids Cai, Yan-Chuan; Padilla, Nelson; Li, Baojiu Monthly Notices of the Royal Astronomical Society, Vol. 451, Issue 1 https://doi.org/10.1093/mnras/stv777	journal	June 2015
Multipole analysis of redshift-space distortions around cosmic voids Hamaus, Nico; Cousinou, Marie-Claude; Pisani, Alice Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 07 https://doi.org/10.1088/1475-7516/2017/07/014	journal	July 2017
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First Data Release of the COSMOS Ly α Mapping and Tomography Observations: 3D Ly α Forest Tomography at 2.05 < z < 2.55 Lee, Khee-Gan; Krolewski, Alex; White, Martin The Astrophysical Journal Supplement Series, Vol. 237, Issue 2 https://doi.org/10.3847/1538-4365/aace58	journal	August 2018
TARDIS. I. A Constrained Reconstruction Approach to Modeling the z ∼ 2.5 Cosmic Web Probed by Ly α Forest Tomography Horowitz, Benjamin; Lee, Khee-Gan; White, Martin The Astrophysical Journal, Vol. 887, Issue 1 https://doi.org/10.3847/1538-4357/ab4d4c	journal	December 2019
Three- and two-point spatial correlations of intergalactic medium at $z\sim 2$ using projected quasar triplets Maitra, Soumak; Srianand, Raghunathan; Petitjean, Patrick arXiv https://doi.org/10.48550/arxiv.1907.02086	text	January 2019
Three- and two-point spatial correlations of intergalactic medium at z ∼ 2 using projected quasar triplets Maitra, Soumak; Srianand, Raghunathan; Petitjean, Patrick Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 3 https://doi.org/10.1093/mnras/stz2828	journal	October 2019
Searching for the shadows of giants: characterizing protoclusters with line of sight Lyman-α absorption Miller, Joel S. A.; Bolton, James S.; Hatch, Nina Monthly Notices of the Royal Astronomical Society, Vol. 489, Issue 4 https://doi.org/10.1093/mnras/stz2504	journal	September 2019
Mapping Quasar Light Echoes in 3D with Ly α Forest Tomography Schmidt, Tobias M.; Hennawi, Joseph F.; Lee, Khee-Gan The Astrophysical Journal, Vol. 882, Issue 2 https://doi.org/10.3847/1538-4357/ab2fcb	journal	September 2019
Dark Energy Survey year 1 results: the relationship between mass and light around cosmic voids Fang, Y.; Hamaus, N.; Jain, B. Monthly Notices of the Royal Astronomical Society, Vol. 490, Issue 3 https://doi.org/10.1093/mnras/stz2805	journal	October 2019
Dark Energy Survey Year 1 results: The relationship between mass and light around cosmic voids Fang, Y.; Hamaus, N.; Jain, B. arXiv https://doi.org/10.48550/arxiv.1909.01386	text	January 2019

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