Extended ΛCDM model
نویسندگان
چکیده
منابع مشابه
Modified Gravity Theories: Distinguishing from ΛCDM Model
The method and probability of distinguishing between the Λ cold dark matter (ΛCDM) model and modified gravity are studied from future observations for the growth rate of cosmic structure (Euclid redshift survey). We compare the mock observational data to the theoretical cosmic growth rate by modified gravity models, including the extended Dvali–Gabadadze–Porrati (DGP) model, kinetic gravity bra...
متن کاملThe Earliest Epoch of Reionisation in the Standard ΛCDM Model
We show that the earliest possible reionisation of the universe is approximately at z ≃ 13.5 and the optical depth is τ ≃ 0.17 in the conventionally accepted Λ cold dark matter (ΛCDM) model with adiabatic fluctuations of a flat spectrum normalised to the cosmic microwave background. This is just consistent with the reionisation found by WMAP (the apparently earlier reionisation epoch of the WMA...
متن کاملVoids in a ΛCDM Universe
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...
متن کاملModelling SCUBA sources in a ΛCDM cosmology: hot starbursts or cold extended galactic dust?
Previous modelling has demonstrated that it is difficult to reproduce the SCUBA source counts within the framework of standard hierarchical structure formation models if the sources are assumed to be the high-redshift counterparts of local ultraluminous infrared galaxies with dust temperatures in the range 40 – 60 K. Here, we show that the counts are more easily reproduced in a model in which t...
متن کاملChallenges for ΛCDM and MOND
The Universe on large scales is well described by the ΛCDM cosmological model. There however remain some heavy clouds on our global understanding, especially on galaxy scales, which we review here. While some of these clouds might perhaps disappear through small compensatory adjustments of the model, such as changing the mass of the dark matter particles or accounting better for baryonic physic...
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ژورنال
عنوان ژورنال: Astroparticle Physics
سال: 2019
ISSN: 0927-6505
DOI: 10.1016/j.astropartphys.2018.10.002