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The metallicity distribution of HI systems in the EAGLE cosmological simulation
Alireza Rahmati, Benjamin D. Oppenheimer
The metallicity of strong HI systems, spanning from damped Lyman-alpha absorbers (DLAs) to Lyman-limit systems (LLSs) is explored between z = 5->0 using the EAGLE high-resolution c…
Probing the Metal Enrichment of the Intergalactic Medium at Using the Hubble Space Telescope
Zheng Cai, Xiaohui Fan, Romeel Dave +2
We test the galactic outflow model by probing associated galaxies of four strong intergalactic CIV absorbers at --6 using the Hubble Space Telescope (HST) ACS ramp narrowband…
The multiphase circumgalactic medium traced by low metal ions in EAGLE zoom simulations
Benjamin D. Oppenheimer, Joop Schaye, Robert A. Crain +2
We explore the circumgalactic metal content traced by commonly observed low ion absorbers, including C II, Si II, Si III, Si IV, and Mg II. We use a set of cosmological hydrodynami…
Flickering AGN can explain the strong circumgalactic O VI observed by COS-Halos
Benjamin D. Oppenheimer, Marijke Segers, Joop Schaye +2
Proximity zone fossils (PZFs) are ionization signatures around recently active galactic nuclei (AGN) where metal species in the circumgalactic medium remain over-ionized after the…
Metals in the circumgalactic medium are out of ionization equilibrium due to fluctuating active galactic nuclei
Marijke C. Segers, Benjamin D. Oppenheimer, Joop Schaye +1
We study the effect of a fluctuating active galactic nucleus (AGN) on the abundance of circumgalactic OVI in galaxies selected from the EAGLE simulations. We follow the time-variab…
The Warm Circum-Galactic Medium: 10^5-6 K Gas Associated with a Single Galaxy Halo or with an Entire Group of Galaxies?
John Stocke, Brian Keeney, Charles Danforth +3
In preparation for a Hubble Space Telescope (HST) observing project using the Cosmic Origins Spectrograph (COS), the positions of all AGN targets having high-S/N far-UV G130M spect…