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Models of galaxy formation in a CDM universe predict that massive galaxies are surrounded by a hot, quasi-hydrostatic circumgalactic corona of slowly cooling gas, predominantly accreted from the IGM. This prediction is borne out by the…

宇宙学与河外天体物理 · 物理学 2015-06-15 Robert A. Crain , Ian G. McCarthy , Joop Schaye , Carlos S. Frenk , Tom Theuns

It has been hypothesized that photons from young, massive star clusters are responsible for maintaining the ionization of diffuse warm ionized gas seen in both the Milky Way and other disk galaxies. For a theoretical investigation of the…

星系天体物理 · 物理学 2020-07-22 Erin Kado-Fong , Jeong-Gyu Kim , Eve C. Ostriker , Chang-Goo Kim

A tightly correlated star formation rate-stellar mass relation of star forming galaxies, or star-forming sequence (SFS), is a key feature in galaxy property-space that is predicted by modern galaxy formation models. We present a flexible…

We report the results of high-resolution (~0.2 pc) CO(1-0) and CS(2-1) observations of the central regions of three star-forming molecular clouds in the far-outer Galaxy (~16 kpc from the Galactic Center): WB89 85 (Sh 2-127), WB89 380, and…

天体物理学 · 物理学 2016-08-30 J. Brand , J. G. A. Wouterloot , A. L. Rudolph , E. J. de Geus

Recent observational studies suggest that the interplay between internal and environmental mechanisms, in particular, the combined action of stellar bars and ram pressure stripping (RPS) may influence central star formation activity in…

The discovery of gravitationally lensed stellar clusters at high redshift with the James Webb Space Telescope (JWST) has revealed extremely compact, massive star-forming systems in galaxies at $z > 6$, providing a new window into early…

星系天体物理 · 物理学 2026-05-13 Floor van Donkelaar , Lucio Mayer , Pedro R. Capelo , Debora Sijacki , Angela Adamo

The mechanism by which galaxies stop forming stars and get rid of their interstellar medium (ISM) remains elusive. Here, we study a sample of more than two thousand elliptical galaxies in which dust emission has been detected. This is the…

Splash bridges are formed from the direct inelastic collision of gas-rich galaxies. Recent multi-wavelength observations of the Taffy galaxies, UGC 12914/15, have revealed complicated gas structures in the bridge. We have upgraded the…

星系天体物理 · 物理学 2020-01-15 Travis Yeager , Curt Struck

We explore the relation between dust and several fundamental properties of simulated galaxies using the Dusty SAGE semi-analytic model. In addition to tracing the standard galaxy properties, Dusty SAGE also tracks cold dust mass in the…

星系天体物理 · 物理学 2021-03-01 Dian P. Triani , Manodeep Sinha , Darren J. Croton , Eli Dwek , Camilla Pacifici

Ram pressure stripping of galaxies in clusters can yield gas deficient disks. Previous numerical simulations based on various approaches suggested that, except for near edge-on disk orientations, the amount of stripping depends very little…

宇宙学与河外天体物理 · 物理学 2015-05-13 P. Jachym , J. Koppen , J. Palous , F. Combes

We investigate the properties of the interstellar medium (ISM) at ~100 pc scales in a sample of 27 nearby luminous infrared galaxies (LIRGs) spanning the entire merger sequence. In particular, we study the relations between star-formation…

Observations have established that the diffuse intergalactic medium (IGM) at z ~ 3 is enriched to ~0.1-1% solar metallicity and that the hot gas in large clusters of galaxies (ICM) is enriched to 1/3-1/2 solar metallicity at z=0. Metals in…

天体物理学 · 物理学 2009-11-06 Anthony Aguirre , Lars Hernquist , Joop Schaye , Neal Katz , David H. Weinberg , Jeffrey Gardner

What is the nature of a star forming clump? Observations reveal these to be chaotic environments being modified and influenced by many physical processes. However, numerical simulations often define these initial star forming clumps to be…

星系天体物理 · 物理学 2023-06-07 James Wurster , Connar Rowan

I review the properties of the interstellar medium in the Magellanic Clouds and Local Group dwarf galaxies. The more massive, star-forming galaxies show a complex, multi-phase ISM full of shells and holes ranging from very cold phases (a…

天体物理学 · 物理学 2007-05-23 Eva K. Grebel

High spatial and spectral resolution observations of the atomic interstellar medium in nearby dwarf galaxies reveal evidence for warm and cold neutral gas, just like the phases in our own Galaxy. The cold or quiescent phase (about 20% of…

天体物理学 · 物理学 2009-04-13 L. M. Young , L. van Zee , R. C. Dohm-Palmer , K. Y. Lo

We analyze the radial pressure profiles, the ICM clumping factor and the Sunyaev-Zel'dovich (SZ) scaling relations of a sample of simulated galaxy clusters and groups identified in a set of hydrodynamical simulations based on an updated…

Galaxies falling into galaxy clusters can leave imprints on both the corona of galaxies and the intracluster medium (ICM) of galaxy clusters. Throughout this infall process, the galaxy's atmosphere is subjected to ram pressure from a…

星系天体物理 · 物理学 2025-10-10 Yung-Hsuan Tseng , Hsiang-Yi Karen Yang , Ryan Farber , Mateusz Ruszkowski

In many gravitational interactions between galaxies, gas and stars that have been torn from either or both of the precursor galaxies can collect in 'tidal tails'. Star formation begins anew in these regions to produce 'tidal dwarf…

天体物理学 · 物理学 2017-05-10 Jonathan Braine , Ute Lisenfeld , Pierre-Alain Duc , Stephane Leon

There exist extremely massive spiral galaxies in isolated environments, with stellar masses several times that of the Milky Way, yet their star formation rates (SFRs) are comparable to or even lower than that of the Milky Way. In this…

星系天体物理 · 物理学 2025-10-21 Yu Huang , Jiangtao Li , Yan Jiang , Ping Zhou , Jianghui Xu , Liyuan Lu , Yang Yang

We examine the thermodynamic state and cooling of the low-$z$ Circum-Galactic Medium (CGM) in five FIRE-2 galaxy formation simulations of Milky Way-mass galaxies. We find that the CGM in these simulations is generally multiphase and…

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