Gravity-driven Lyα blobs from cold streams into galaxies
نویسندگان
چکیده
منابع مشابه
Gravity-driven Lyα blobs from cold streams into galaxies
We use high-resolution cosmological hydrodynamical adaptive mesh refinement (AMR) simulations to predict the characteristics of Lyα emission from the cold gas streams that fed galaxies in massive haloes at high redshift. The Lyα luminosity in our simulations is powered by the release of gravitational energy as gas flows from the intergalactic medium into the halo potential wells. The ultraviole...
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Recent hydrodynamic simulations of galaxy formation reveal streams of cold (T ∼ 10 K) gas flowing into the centers of dark matter halos as massive as 10M⊙ at redshifts z ∼ 1–3. In this paper we show that if > ∼ 10% of the gravitational binding energy of the gas is radiated away, then the simulated cold flows are spatially extended Lyα sources with luminosities, Lyα line widths, and number densi...
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Over the past decade, mysterious blobs of Lyα emission by hydrogen have been discovered in the vicinity of galaxies at early cosmic times . Although a number of possible models were proposed to explain these blobs , none appeared to be consistent with all available data. In a seemingly unrelated frontier, the latest computer simulations of galaxy formation reveal streams of cold (∼ 10 K) gas fe...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2010
ISSN: 0035-8711
DOI: 10.1111/j.1365-2966.2010.16941.x