Results 71 to 80 of about 2,374,498 (256)

Analyzing Oxygen Ionization in the Circumgalactic Medium

Research Notes of the AAS, 2021
Abstract Galaxies are surrounded by low-density, highly-ionized clouds of gas, called the Circumgalactic Medium (CGM), which provides insight into galaxy evolution. CGM observations are sensitive to ionization levels, which requires studying ionization types: photoionization (PI), more density-dependent and associated with cooler gas ...
Sally Zhu, Rahul Sharma, Clayton J. Strawn   +2 more
openaire   +1 more source

The COS CGM Compendium. IV. Effects of Varying Ionization Backgrounds on\n Metallicity Determinations in the z < 1 Circumgalactic Medium [PDF]

, 2022
Justus Gibson, Nicolas Lehner, Benjamin D. Oppenheimer, J. Christopher Howk, Kathy L. Cooksey, Andrew J. Fox   +5 more
openalex   +2 more sources

The circumgalactic medium in Lyman-alpha: a new constraint on galactic outflow models [PDF]

, 2019
Galactic outflows are critical to our understanding of galaxy formation and evolution. However the details of the underlying feedback process remain unclear.
Chung, Andrew S., Ciardi, Benedetta, Dijkstra, Mark, Kakiichi, Koki, Naab, Thorsten   +4 more
core   +2 more sources

The SUPERCOLD-CGM Survey. I. Probing the Extended CO(4–3) Emission of the Circumgalactic Medium in a Sample of 10 Enormous Lyα Nebulae at z ∼ 2

The Astrophysical Journal, 2023
To understand how massive galaxies at high z coevolve with enormous reservoirs of halo gas, it is essential to study the coldest phase of the circumgalactic medium (CGM), which directly relates to stellar growth.
Jianrui Li, Bjorn H. C. Emonts, Zheng Cai, Jianan Li, Fabrizio Arrigoni Battaia, Jason X Prochaska, Ilsang Yoon, Matthew D. Lehnert, Craig Sarazin, Yunjing Wu, Mark Lacy, Brian Mason, Kyle Massingill   +12 more
doaj   +1 more source

Emission line ratios for the Circumgalactic Medium and the "Bimodal" Nature of Galaxies

, 2018
We find significantly different diagnostic emission line ratios for the circumgalactic gas associated with galaxies of stellar masses above and below $10^{10.4}$ M$_\odot$ using SDSS spectroscopy. Specifically, in a sample of 17,393 galaxies, intersected
Behroozi, Peter, Werk, Jessica, Zaritsky, Dennis, Zhang, Huanian   +3 more
core   +1 more source

An HST/COS legacy survey of high-velocity ultraviolet absorption in the Milky Way's circumgalactic medium and the Local Group [PDF]

, 2017
To characterize the absorption properties of this circumgalactic medium (CGM) and its relation to the LG we present the so-far largest survey of metal absorption in Galactic high-velocity clouds (HVCs) using archival ultraviolet (UV) spectra of ...
Bekhti, N. Ben, Charlton, J. C., Fechner, C., Fox, A. J., Ganguly, R., Howk, J. C., Lehner, N., Muzahid, S., Nuza, S. E., Richter, P., Wakker, B. P., Wendt, M.   +11 more
core   +3 more sources

Density and metallicity of the Milky-Way circumgalactic gas

, 2017
The halo of the Milky-Way circumgalactic gas extends up to the virial radius of the Galaxy, ~250 kpc. The halo properties may be deduced from X-ray spectroscopic observations and from studies of the ram-pressure stripping of satellite dwarf galaxies. The
Troitsky, Sergey
core   +1 more source

Probing the Circumgalactic Medium with Fast Radio Bursts: Insights from CAMELS [PDF]

Astrophysical Journal
Most diffuse baryons, including the circumgalactic medium (CGM) surrounding galaxies and the intergalactic medium (IGM) in the cosmic web, remain unmeasured and unconstrained.
Isabel Medlock, D. Nagai, Priyanka Singh, B. Oppenheimer, D. Anglés-Alcázar, F. Villaescusa-Navarro   +5 more
semanticscholar   +1 more source

Figuring Out Gas and Galaxies in Enzo (FOGGIE). IX. The Angular Momentum Evolution of Milky Way–like Galaxies and Their Circumgalactic Gas

The Astrophysical Journal
We investigate the coevolution of the angular momentum of Milky Way–like galaxies, their circumgalactic gas, and their dark matter halos using zoom-in simulations from the Figuring Out Gas and Galaxies in Enzo suite.
Raymond C. Simons, Molly S. Peeples, Jason Tumlinson, Brian W. O’Shea, Cassandra Lochhaas, Anna C. Wright, Ayan Acharyya, Ramona Augustin, Kathleen A. Hamilton-Campos, Britton D. Smith, Nicolas Lehner, Jessica K. Werk, Yong Zheng   +12 more
doaj   +1 more source

A Budget and Accounting of Metals at z~0: Results from the COS-Halos Survey

, 2014
We present a budget and accounting of metals in and around star-forming galaxies at $z\sim 0$. We combine empirically derived star formation histories with updated supernova and AGB yields and rates to estimate the total mass of metals produced by ...
Katz, Neal, Oppenheimer, Benjamin D., Peeples, Molly S., Prochaska, J. Xavier, Tumlinson, Jason, Weinberg, David H., Werk, Jessica K.   +6 more
core   +1 more source