Hot Gas In and Around Elliptical Galaxies

Abstract

We review the origin, evolution and physical nature of hot gas in elliptical galaxies and associated galaxy groups. Unanticipated recent X-ray observations with Chandra and XMM indicate much less cooling than previously expected. Consequently, many long-held assumptions need to be reexamined or discarded and new approaches must be explored. Chief among these are the role of heating by active galactic nuclei, the influence of radio lobes on the hot gas, details of the cooling process, possible relation between the hot and colder gas in elliptical galaxies, and the complexities of stellar enrichment of the hot gas.

46 pages, 5 figures

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• The Hot Interstellar Medium
• Polytropic dark halos of elliptical galaxies
• The Highly Self-Absorbed Blazar, PKS\,1351$-$018
• Nonthermal afterglow of the binary neutron star merger GW170817: a more natural modeling of electron energy distribution leads to a qualitatively different new solution
• Narrow Band X-ray Photometry as a Tool for Studying Galaxy and Cluster Mass Distributions
• XMM-Newton X-ray and Optical Monitor far UV observations of NGC 7070A and ESO 2400100 shell galaxies
• Chandra survey of nearby highly inclined disk galaxies -- V: emission structure and origin of galactic coronae
• Superdisks and the structural asymmetry of radio galaxies
• The Afterglows of Ultraluminous Quasars
• Significant H I and Metal Differences around the z = 0.83 Lens Galaxy Towards the Doubly Lensed Quasar SBS 0909+532
• Suppression of Star Formation in the Hosts of Low-Excitation Radio Galaxies
• Connecting Star Formation Quenching with Galaxy Structure and Supermassive Black Holes through Gravitational Heating of Cooling Flows
• Global structure and dynamics of slowly rotating accretion flows
• Spectral Energy Distribution Mapping of Two Elliptical Galaxies on sub-kpc scales
• The Size of the Cooling Region of Hot Gas in Two Elliptical Galaxies
• The Energetics of Launching the Most Powerful Jets in Quasars: A Study of 3C82
• The infalling elliptical galaxy M89: The chemical composition of the AGN disturbed hot atmosphere
• Galactic Traversability: A New Concept for Extragalactic SETI
• X-ray Halos around Massive Galaxies: Data and Theory
• Gravitational and distributed heating effects of a cD galaxy on the hydrodynamical structure of its host cluster
• The Energetics of the Central Engine in the Powerful Quasar, 3C298
• A multi-wavelength study of nuclear activity and environment of a low power radio galaxy CTD 86
• X-ray properties of massive compact relic galaxies
• Refracted Gravity Solutions from Small to Large Scales
• Connections between Central Intensity Ratio and hot gas properties of early-type galaxies
• The AGN fuelling/feedback cycle in nearby radio galaxies -- IV. Molecular gas conditions and jet-ISM interaction in NGC3100
• Relationships Between Stellar Velocity Dispersion and the Atmospheres of Early-Type Galaxies
• A unified framework for hot accretion flows with finite angular momentum: from Bondi-like to disc-like regimes
• A Parameter Space Exploration of High Resolution Numerically Evolved Early Type Galaxies Including AGN Feedback and Accurate Dynamical Treatment of Stellar Orbits
• A non-uniform metal distribution in the ram-pressure stripped circumgalactic medium of M86
• The mass-dependent interplay of active galacitc nuclei and supernova feedback in shaping the $L_{\mathrm{X}}$--$T$ relation of early-type galaxies
• Radial Distributions of Star Formation and Gas-phase Metallicity in Spiral-Elliptical Galaxy Pairs