Velocities hasten to tell us about the Universe

Abstract

The peculiar velocities of galaxies are driven by gravity, and hence hold the promise of probing details of how gravity forms structures. In particular it is possible to constrain cosmological parameters and to test extensions to the standard model, such as modifications to the theory of gravity or the existence of primordial density perturbations which are non-Gaussian. This constraining power has been frustrated by systematic effects, but we appear to be entering an era when velocity measurements may finally be living up to their promise.

arXiv commentA review article of 6 pages and 8 figures

References in corpus (25)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Cosmological Results from High-z Supernovae
• The Cosmic Energy Inventory
• The PSCz Catalogue
• Where Are the Baryons? II: Feedback Effects
• Consistently Large Cosmic Flows on Scales of 100 Mpc/h: a Challenge for the Standard LCDM Cosmology
• The IRAS 1.2 Jy Survey: Redshift Data
• Cosmic flows in the nearby universe from Type Ia Supernovae
• Evidence of Galaxy Cluster Motions with the Kinematic Sunyaev-Zel'dovich Effect
• Dynamics of Cosmic Flows
• Simulations of the Microwave Sky
• Local Gravity versus Local Velocity: Solutions for $\beta$ and nonlinear bias
• A Non Parametric Model for the Cosmic Velocity Field
• The cosmological bulk flow: consistency with $\Lambda$CDM and $z\approx 0$ constraints on ${\sigma }_8$ and $\gamma$
• Kinematical and chemical vertical structure of the Galactic thick disk II. A lack of dark matter in the solar neighborhood
• Detection of warm and diffuse baryons in large scale structure from the cross-correlation of gravitational lensing and the thermal Sunyaev-Zeldovich effect
• Redshift-distance Survey of Early-type Galaxies: the ENEARc Cluster Sample
• The peculiar velocity field: constraining the tilt of the Universe
• Measuring the dark flow with public X-ray cluster data
• Cosmic bulk flows on 50 {h}^{-1}Mpc scales: A Bayesian hyper-parameter method and multishells likelihood analysis
• An estimation of local bulk flow with the maximum-likelihood method
• Prospects for galaxy-mass relations from the 6dF Galaxy Survey
• A comparison of the galaxy peculiar velocity field with the PSCz gravity field-- A Bayesian hyper-parameter method
• Probing the Large-Scale Velocity Field with Clusters of Galaxies
• Independent constraints on local non-Gaussianity from the peculiar velocity and density fields

Cited by in corpus (4)

• Cosmic filaments in galaxy cluster outskirts: quantifying finding filaments in redshift space
• Peculiar velocity measurement in a clumpy universe
• Modified Gravity and Large Scale Flows, a Review
• Squared-field cross-correlation between kinetic Sunyaev-Zel'dovich effect and 21-cm intensity mapping