John O'Meara

Chief Scientist

United States

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About

John O'Meara is the Chief Scientist at the W.M. Keck Observatory in the United States. His research primarily focuses on the circumgalactic medium, galaxy formation, and the effects of galactic outflows, as highlighted in his recent publications. His work includes investigations into the dynamics and composition of gas in and around galaxies, specifically at varying redshifts. O'Meara's contributions to understanding the interactions between star-forming galaxies and their environments are influential in the field of astrophysics.

Articles (13)

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2025

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2025

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2024

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2023

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2023

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2023

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2023

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2022

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2022

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2022

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2022

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2021

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2021

Collaborators (10)

Brian O'Shea

Professor

Michigan State University

UNITED STATES

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Brooke Simmons

University of Lancaster

UNITED KINGDOM

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Sanchayeeta Borthakur

Associate Professor

Arizona State University

UNITED STATES

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Ayan Acharyya

Johns Hopkins University

UNITED STATES

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Assistant Professor

Middlebury College

UNITED STATES

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John O'Meara

Research Interests

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Articles (13)

Tilsotua: Reproducing Slitmask Sky Positions for use with the LRIS Multislit Archive

Spatially Resolved Circumgalactic Medium around a Star-forming Galaxy Driving a Galactic Outflow at z ≈ 0.8

The COS CGM Compendium. V. The Dichotomy of O vi Associated with Low- and High-metallicity Cool Gas at z < 1

The CGM2 Survey: Quenching and the Transformation of the Circumgalactic Medium

The Bimodal Absorption System Imaging Campaign (BASIC). I. A Dual Population of Low-metallicity Absorbers at z < 1

A Candidate Dual QSO at Cosmic Noon

CGM2 + CASBaH: The Mass Dependence of H i Lyα–Galaxy Clustering and the Extent of the CGM

KODIAQ-Z: Metals and Baryons in the Cool Intergalactic and Circumgalactic Gas at 2.2 ≲ z ≲ 3.6

The CGM2 Survey: Circumgalactic O vi from Dwarf to Massive Star-forming Galaxies

On the Kinematics of Cold, Metal-enriched Galactic Fountain Flows in Nearby Star-forming Galaxies

Constraining the Size of the Circumgalactic Medium Using the Transverse Autocorrelation Function of C iv Absorbers in Paired Quasar Spectra

The H i Column Density Distribution of the Galactic Disk and Halo

CGM2 I: The Extent of the Circumgalactic Medium Traced by Neutral Hydrogen

Collaborators (10)

Brian O'Shea

Brooke Simmons

Sanchayeeta Borthakur

Ayan Acharyya

Matthew Wilde

Nicolas Lehner

J. Christopher Howk

Kathy Cooksey

Jessica Werk

Eilat Glikman

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