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Related papers: The Circumgalactic Medium

200 papers

The circumgalactic medium (CGM) plays a pivotal role in regulating gas flows around galaxies and thus shapes their evolution. However, the details of how galaxies and their CGM co-evolve remain poorly understood. We present a new…

The circumgalactic medium (CGM) is one of the frontiers of galaxy formation and intimately connected to the galaxy via accretion of gas on to the galaxy and gaseous outflows from the galaxy. Here we analyse the magnetic field in the CGM of…

The circumgalactic medium (CGM) is known to contain multiphase gas in various stages of evolution and interaction with the galaxy. In order to characterize its detailed behavior on short timescales, we use a subregion of the TNG100…

Astrophysics of Galaxies · Physics 2026-05-08 Daniel DeFelippis , Shy Genel , Greg L. Bryan

The circumgalactic medium (CGM), as the gas repository for star formation, might contain the answer to the mysterious galaxy quenching and bimodal galaxy population origin. We measured the X-ray emission of the hot CGM around star-forming…

Despite its crucial role in galaxy evolution, the complex circumgalactic medium (CGM) remains underexplored. Although it is known to be multi-phase, the importance of the molecular gas phase to the total CGM mass budget is, to date,…

This paper examines how the circumgalactic medium (CGM) evolves as a function of time by comparing results from different absorption-line surveys that have been conducted in the vicinities of galaxies at different redshifts. Despite very…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Hsiao-Wen Chen

The circumgalactic medium (CGM) is the diffuse gas surrounding a galaxy's halo, and it plays a vital role in the galactic baryon cycle. However, its mass distribution across the virial phase and the cooler, denser atomic phase, remains…

Astrophysics of Galaxies · Physics 2025-11-04 Rajsekhar Mohapatra , Alankar Dutta , Prateek Sharma

Spurred by rich, multi-wavelength observations and enabled by new simulations, ranging from cosmological to sub-pc scales, the last decade has seen major theoretical progress in our understanding of the circumgalactic medium. We review key…

Astrophysics of Galaxies · Physics 2023-01-26 Claude-Andre Faucher-Giguere , S. Peng Oh

The intergalactic medium (IGM) comprises all the matter that lies between galaxies. Hosting the vast majority ($\gtrsim 90\%$) of the baryons in the Universe, the IGM is a critical reservoir and probe for cosmology and astrophysics,…

Cosmology and Nongalactic Astrophysics · Physics 2025-04-18 Nicolas Tejos

The circumgalactic medium (CGM) is closely linked to galaxy formation and evolution, but difficult to characterize observationally and typically poorly resolved in cosmological simulations. We use spherically-symmetric, idealized,…

Astrophysics of Galaxies · Physics 2020-02-12 Cassandra Lochhaas , Greg L. Bryan , Yuan Li , Miao Li , Drummond Fielding

The circumgalactic medium (CGM), i.e. the gaseous haloes around galaxies, is both the reservoir of gas that fuels galaxy growth and the repository of gas expelled by galactic winds. Most cosmological, hydrodynamical simulations focus their…

Astrophysics of Galaxies · Physics 2019-04-12 Freeke van de Voort , Volker Springel , Nir Mandelker , Frank C. van den Bosch , Rüdiger Pakmor

The presence of cold ($T \lesssim 10^4$ K) gas in the circumgalactic medium (CGM) of galaxies has been confirmed both in observations and high-resolution simulations, but its origin still represents a puzzle. Possible mechanisms are cold…

Astrophysics of Galaxies · Physics 2024-02-14 Davide Decataldo , Sijing Shen , Lucio Mayer , Bernhard Baumschlager , Piero Madau

Galaxies evolve through a dynamic exchange of material with their immediate surrounding environment, the so-called circumgalactic medium (CGM). Understanding the physics of gas flows and the nature of the CGM is thus fundamental to studying…

Astrophysics of Galaxies · Physics 2024-10-16 C. Di Cesare , M. Ginolfi , L. Graziani , R. Schneider , M. Romano , G. Popping

Galaxies are surrounded by extended gaseous halos which store significant fractions of chemical elements. These are syntethized by the stellar populations and later ejected into the circumgalactic medium (CGM) by different mechanism, of…

Astrophysics of Galaxies · Physics 2018-01-10 Rubens E. G. Machado , Patricia B. Tissera , Gastão B. Lima Neto , Laerte Sodré

We present a study exploring the impact of a starburst on the properties of the surrounding circum-galactic medium (CGM): gas located beyond the galaxy's stellar body and extending out to the virial radius (200 kpc). We obtained ultraviolet…

Cosmology and Nongalactic Astrophysics · Physics 2014-09-16 Sanchayeeta Borthakur , Timothy Heckman , David Strickland , Vivienne Wild , David Schiminovich

The majority of baryons reside beyond the optical extent of a galaxy in the circumgalactic and intergalactic media (CGM/IGM). Gaseous halos are inextricably linked to the appearance of their host galaxies through a complex story of…

The circumgalactic medium (CGM) of typical galaxies is crucial to our understanding of the cycling of gas into, through and out of galaxies. One way to probe the CGM is to study gas around galaxies detected via the absorption lines they…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Celine Peroux , Nicolas Bouche , Varsha P. Kulkarni , Donald G. York

The interstellar medium (ISM) is a key ingredient in galaxy formation and evolution as it provides the molecular gas reservoir which fuels star formation and supermassive black hole accretion. Yet the ISM is one of the least studied aspects…

Astrophysics of Galaxies · Physics 2009-01-23 T. R. Greve

We assess the fraction of the Milky Way's circumgalactic medium (CGM) eluding detection due to its velocity being similar to gas in the disk. This is achieved using synthetic observations of the CGM in a simulated MW-mass galaxy that shows…

Astrophysics of Galaxies · Physics 2017-11-02 Y. Zheng , M. E. Putman , J. E. G. Peek , M. R. Joung

The gas needed to sustain star formation in galaxies is supplied by the circumgalactic medium (CGM), which in turn is affected by accretion from large scales. In a series of two papers, we examine the interplay between a galaxy's ambient…

Astrophysics of Galaxies · Physics 2021-11-17 Shengdong Lu , Dandan Xu , Sen Wang , Zheng Cai , Chuan He , C. Kevin Xu , Xiaoyang Xia , Shude Mao , Volker Springel , Lars Hernquist