نتایج جستجو برای: galaxy evolution
تعداد نتایج: 389980 فیلتر نتایج به سال:
Lyman-$\alpha$ (Ly$\alpha$) emitting galaxies are powerful tools to probe the late stages of cosmic reionization. The observed sudden drop in Ly$\alpha$ fraction at $z>6$ is often interpreted as a sign reionization, since intergalactic medium (IGM) more neutral and opaque photons. Crucially, this interpretation observations only valid under assumption that themselves experience minimal evolutio...
We simulate the formation and evolution of the local galaxy population starting from initial conditions with a smoothed linear density field which matches that derived from the IRAS 1.2 Jy galaxy survey. Our simulations track the formation and evolution of all dark matter haloes more massive than 1011M⊙ out to a distance of 8000 km s −1 from the Milky Way. We implement prescriptions similar to ...
Star clusters are found in ∼40% of the Local Group galaxies. Their properties are reviewed. The impact of galaxy environment on the evolution and survival of star clusters is discussed. Possible evidence for cluster formation triggered by galaxy interactions, gradients in cluster size, metallicity and stellar content with galactocentric radius and variations as a function of galaxy type are bri...
High redshift galaxy clusters have traditionally been a fruitful place to study galaxy evolution. I review various search strategies for finding clusters at z > 1. Most efforts to date have concentrated on the environments of distant AGN. I illustrate these with data on the cluster around 3C 324 (z = 1.2) and other, more distant systems, and discuss possibilities for future surveys with large t...
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