منابع مشابه
Dark Matter and Metal Abundances in Elliptical Galaxies from X-ray Observations of the Hot ISM
I review the results of recent analysis and interpretation of X-ray observations of elliptical galaxies, focusing on elemental abundances and dark matter. The hot ISM is characterized by subsolar Fe abundances and solar Si-to-Fe ratios; and, I compare these with stellar abundances and discuss implications of these measurements. From models constructed to explain X-ray temperatures and their cor...
متن کاملDecoupled hot gas flows in elliptical galaxies
We present the results of a new set of hydrodynamical simulations of hot gas flows in model elliptical galaxies with the following characteristics: the spatial luminosity distribution approaches a power law form at small radii, in accordance with the results of recent ground based observations, and with the Hubble Space Telescope; the dark matter has a peaked profile too, as indicated by high r...
متن کاملSimulating the Hot X-ray Emitting Gas in Elliptical Galaxies
We study the chemo-dynamical evolution of elliptical galaxies and their hot X-ray emitting gas using high-resolution cosmological simulations. Our Tree N-body/SPH code includes a self-consistent treatment of radiative cooling, star formation, supernovae feedback, and chemical enrichment. We present a series of ΛCDM cosmological simulations which trace the spatial and temporal evolution of heavy...
متن کاملThe changing ISM of massive elliptical galaxies and cosmic evolution of radio galaxies and quasars
The recently discovered apparent dramatic expansion in the effective radii of massive elliptical galaxies from z ≃ 2 to z ≃ 0.1 has been interpreted in terms of either galaxy mergers or the rapid loss of cold gas due to AGN feedback. In examining the latter case we have quantified the extent of the expansion, which is uncertain observationally, in terms of the star formation parameters and time...
متن کاملCool ISM in Elliptical Galaxies . I . A Survey of Molecular Gas Leslie
We present preliminary results from a survey of CO emission from members of a volume-limited sample of non-cluster elliptical galaxies. Our intent is to compare the gas properties of these ellipticals to a sample of lenticulars selected – 2 – using similar criteria. The data, although still sparse, suggest that the cool gas in ellipticals shows the same puzzling upper mass cutoff found in the l...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2009
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921310009282