منابع مشابه
Action Principle Solutions for Galaxy Motions within 3000 Km S
The numerical action variational principle is used to find fully nonlinear solutions for the orbits of the mass tracers given their present redshifts and angular positions and the cosmological boundary condition that the peculiar velocities are small at high redshift. A solution predicts the distances of the mass tracers, and is tested by a comparison with measured distances. The current numeri...
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We analyze in detail the peculiar velocity field traced by 56 clusters within 120 hMpc in the “Streaming Motions of Abell Clusters” (SMAC) sample. The bulk flow of the SMAC sample is 687 ± 203 km s, toward l = 260◦ ± 13, b = 0◦ ± 11. We discuss possible systematic errors and show that no systematic effect is larger than half of the random error. The flow does not drop off significantly with dep...
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We present the results of our HI survey of six loose groups of galaxies analogous to the Local Group. The survey was conducted using the Parkes telescope and the Australia Telescope Compact Array to produce a census of all the gas-rich galaxies and analogs to the high-velocity clouds (HVCs) within these groups down to MHI< 10 M⊙ as a test of models of galaxy formation. We present the HI mass fu...
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We use a cosmological chemodynamical simulation to study how the group environment impacts the star formation properties of disk galaxies. The simulated group has a total mass of M ∼ 8 × 10 M⊙ and a total X-ray luminosity of LX ∼ 10 41 erg s. Our simulation suggests that ram pressure is not sufficient in this group to remove the cold disk gas from a Vrot ∼ 150 km s −1 galaxy. However, the major...
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Galaxy groups likely to be virialized are identified within the CNOC2 intermediate redshift galaxy survey using an iterative method. The resulting groups have a median velocity dispersion of about 200 km s−1. The virial mass-to-light ratios, using k-corrected and evolution-compensated luminosities, have medians in the range of 150 − 250hM⊙/L⊙. The number-velocity dispersion relation is in agree...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2017
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aa76db