Disk Sizes in a ΛCDM Universe
نویسندگان
چکیده
منابع مشابه
Disk Galaxy Formation in a Λcdm Universe
We describe hydrodynamical simulations of galaxy formation in a Λ cold dark matter (CDM) cosmology performed using a subresolution model for star formation and feedback in a multiphase interstellar medium (ISM). In particular, we demonstrate the formation of a well-resolved disk galaxy. The surface brightness profile of the galaxy is exponential, with a B-band central surface brightness of 21.0...
متن کاملDisk Sizes in a Λ CDM Universe
We introduce a model which uses semi-analytic techniques to trace formation and evolution of galaxy disks in their cosmological context. For the first time we model the growth of gas and stellar disks separately. In contrast to previous work we follow in detail the angular momentum accumulation history through the gas cooling, merging and star formation processes. Our model successfully reprodu...
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We study the formation and evolution of voids in the dark matter distribution using various simulations of the popular Λ Cold Dark Matter cosmogony. We identify voids by requiring them to be regions of space with a mean overdensity of −0.8 or less – roughly the equivalent of using a Spherical Overdensity group finder for haloes. Each of the simulations contains thousands of voids. The distribut...
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The large–scale structure (LSS) in the Universe comprises a complicated filamentary network of matter. We study this network using a high–resolution simulation of structure formation of a Λ Cold Dark Matter cosmology. We investigate the distribution of matter between neighbouring large haloes whose masses are comparable to massive clusters of galaxies. We identify a total of 228 filaments betwe...
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We compare the highly clustered populations of very high redshift galaxies with proto-clusters identified numerically in a standard ΛCDM universe (Ω0 = 0.3, λ0 = 0.7) simulation. We evolve 2563 dark matter particles in a comoving box of side 150h−1Mpc. By the present day there are 63 cluster sized objects of mass in excess of 10hM⊙ in this box. We trace these clusters back to higher redshift fi...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2008
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921308027890