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Related papers: The Circumgalactic Medium of the Milky Way is Half…

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The circumgalactic medium (CGM) of the Milky Way is mostly obscured by nearby gas in position-velocity space because we reside inside the Galaxy. Substantial biases exist in most studies on the Milky Way's CGM that focus on easier-to-detect…

From our position embedded within the Milky Way's interstellar medium (ISM), we have limited ability to detect gas at low relative velocities in the extended Galactic halo because those spectral lines are blended with much stronger signals…

Astrophysics of Galaxies · Physics 2021-05-21 Hannah V. Bish , Jessica K. Werk , Joshua Peek , Yong Zheng , Mary Putman

The Milky Way galaxy is surrounded by a circumgalactic medium (CGM) that may play a key role in galaxy evolution as the source of gas for star formation and a repository of metals and energy produced by star formation and nuclear activity.…

Astrophysics of Galaxies · Physics 2020-11-03 P. Kaaret , D. Koutroumpa , K. D. Kuntz , K. Jahoda , J. Bluem , H. Gulick , E. Hodges-Kluck , D. M. LaRocca , R. Ringuette , A. Zajczyk

Hot, million degree gas appears to pervade the Milky way halo, containing a large fraction of the Galactic missing baryons. This circumgalactic medium (CGM) is probed effectively in X-rays, both in absorption and in emission. The CGM also…

Astrophysics of Galaxies · Physics 2017-03-08 Anjali Gupta , Smita Mathur , Yair Krongold

Observational evidence shows that low-redshift galaxies are surrounded by extended haloes of multiphase gas, the so-called 'circumgalactic medium' (CGM). To study the survival of relatively cool gas (T < 10^5 K) in the CGM, we performed a…

Astrophysics of Galaxies · Physics 2017-06-28 L. Armillotta , F. Fraternali , J. K. Werk , J. X. Prochaska , F. Marinacci

We present a study exploring the nature and properties of the Circum-Galactic Medium (CGM) and its connection to the atomic gas content in the interstellar medium (ISM) of galaxies as traced by the HI 21cm line. Our sample includes 45 low-z…

We combine the Santa-Cruz Semi-Analytic Model (SAM) for galaxy formation and evolution with the circumgalactic medium (CGM) model presented in Faerman et al. (2020) to explore the CGM properties of $L^{*}$ galaxies. We use the SAM to…

Astrophysics of Galaxies · Physics 2022-03-30 Yakov Faerman , Viraj Pandya , Rachel S. Somerville , Amiel Sternberg

We analyze the physical properties of gas in the circumgalactic medium (CGM) of 132 Milky Way (MW)-like central galaxies at $z=0$ from the cosmological magneto-hydrodynamical simulation TNG50, part of the IllustrisTNG project. The…

Astrophysics of Galaxies · Physics 2023-01-18 Rahul Ramesh , Dylan Nelson , Annalisa Pillepich

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

Surrounding the Milky Way (MW) is the circumgalactic medium (CGM), an extended reservoir of hot gas that has significant implications for the evolution of the MW. We used the HaloSat all-sky survey to study the CGM's soft X-ray emission in…

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)…

Over the past decade, Lyman-alpha and metal line absorption observations have established the ubiquity of a gas-rich circumgalactic medium (CGM) around star-forming galaxies at z~0.2 potentially tracing half of the missing baryonic mass…

Astrophysics of Galaxies · Physics 2019-03-19 D. J. Pisano , A. Fox , D. French , J. C. Howk , N. Lehner , F. J. Lockman , K. Jones

The circumgalactic medium (CGM) plays a crucial role in galaxy evolution as it fuels star formation, retains metals ejected from the galaxies, and hosts gas flows in and out of galaxies. For Milky Way-type and more massive galaxies, the…

The circumgalactic medium (CGM) remains one of the least constrained components of galaxies and as such has significant potential for advancing galaxy formation theories. In this work, we vary the extragalactic ultraviolet background for a…

Astrophysics of Galaxies · Physics 2016-08-31 Lauren Corlies , David Schiminovich

The circumgalactic medium (CGM) of star-forming dwarf galaxies plays a key role in regulating the galactic baryonic cycle. We investigate how susceptible the CGM of dwarf satellite galaxies is to ram pressure stripping (RPS) in Milky…

Astrophysics of Galaxies · Physics 2024-10-10 Jingyao Zhu , Stephanie Tonnesen , Greg L. Bryan , Mary E. Putman

The gas surrounding galaxies outside their disks or interstellar medium and inside their virial radii is known as the circumgalactic medium (CGM). In recent years this component of galaxies has assumed an important role in our understanding…

Astrophysics of Galaxies · Physics 2017-09-28 Jason Tumlinson , Molly S. Peeples , Jessica K. Werk

The circumgalactic medium (CGM) is the most massive baryonic component of a spiral galaxy, shock heated to about $10^6$K for an $\rm L^{\star}$ galaxy. The CGM of the Milky Way has been well-characterized through X-ray absorption line…

Astrophysics of Galaxies · Physics 2023-06-28 Smita Mathur , Sanskriti Das , Anjali Gupta , Yair Krongold

The circumgalactic medium (CGM) is a multi-phase, dynamic interface between galaxy and the intergalactic medium, providing crucial diagnostics of galaxy evolution. However, direct evidence for a hot (million-Kelvin) CGM around present-day…

Astrophysics of Galaxies · Physics 2026-01-26 Lin He , Zhiyuan Li

The recent detection of optical emission lines from the circumgalactic medium (CGM) in combined, large samples of low-redshift, normal galaxy spectra hints at the potential to map the cool ($\sim$ 10$^4$ K) CGM in individual, representative…

Astrophysics of Galaxies · Physics 2024-10-10 Huanian Zhang , Dennis Zaritsky

Galaxy halos appear to be missing a large fraction of their baryons, most probably hiding in the circumgalactic medium (CGM), a diffuse component within the dark matter halo that extends far from the inner regions of the galaxies. A…

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