Galaxy peculiar velocities and evolution-bias
نویسندگان
چکیده
منابع مشابه
Galaxy peculiar velocities and evolution-bias
Galaxy bias can be split into two components: a formation-bias based on the locations of galaxy creation, and an evolution-bias that details their subsequent evolution. In this letter we consider evolution-bias in the peaks model. In this model, galaxy formation takes place at local maxima in the density field, and we analyse the subsequent peculiar motion of these galaxies in a linear model of...
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We investigate the peculiar velocities predicted for galaxy clusters by theories in the cold dark matter family. A widely used hypothesis identiies rich clusters with high peaks of a suitably smoothed version of the linear density uctuation eld. Their peculiar velocities are then obtained by extrapolating the similarly smoothed linear peculiar velocities at the positions of these peaks. We test...
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Galaxy cluster peculiar velocities can be inferred from high–sensitivity, high–resolution multiple–frequency observations in the 30 to 400 GHz range. While galaxy cluster counts and power spectra are sensitive to the growth factor, peculiar velocities are sensitive to the time–derivative of the growth factor and are hence complementary. Using linear perturbation theory, we forecast constraints ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2008
ISSN: 1745-3925,1745-3933
DOI: 10.1111/j.1745-3933.2008.00437.x