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  1. We develop a probe of gravity which compares high mass clusters, where Chameleon effects are weak, to low mass clusters, where the effects can be strong. We utilize the escape velocity edges in the radius/velocity phase space to infer the gravitational potential profiles on scales of 0.3-1 virial radii.
    Author:Alejo Stark, Christopher J. Miller, Nicholas Kern, Daniel Gifford, Gong Bo Zhao, Baojiu Li, Kazuya K...Published:2016
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  3. link.aps.org

    able from the phase space of galaxy clusters, and detail how we do this in N-body simulations. A brief descrip-tion of the N-body simulations we used is also provided. Sec. IV is devoted to putting together both our theo-retical expectations and observables. More specifically, we describe how our test probes gravity in the scale of galaxy ...
  4. durham-repository.worktribe.com

    Probing theories of gravity with phase space-inferred potentials of galaxy clusters Alejo Stark,1 Christopher J. Miller,1,2 Nicholas Kern,3 Daniel Gifford,1 Gong-Bo Zhao,4,5 Baojiu Li,6 Kazuya Koyama,5 and Robert C. Nichol5 1Department of Astronomy, University of Michigan, Ann Arbor, Michigan 48109, USA 2Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
  5. researchgate.net

    The dynamical mass or potential can also be inferred from the escape velocity edges in the radius/velocity phase space, which can be compared with the lensing-inferred mass profile, or the ...
  6. semanticscholar.org

    A general framework to test gravity using galaxy clusters I : modelling the dynamical mass of haloes in f(R) gravity. ... Probing theories of gravity with phase space-inferred potentials of galaxy clusters. Alejo Stark C. Miller +5 authors R. Nichol. Physics. 2016; Modified theories of gravity provide us with a unique opportunity to generate ...
  7. researchportal.port.ac.uk

    Probing theories of gravity with phase space-inferred potentials of galaxy clusters. Alejo Stark, Christopher J. Miller, Nicholas Kern, Daniel Gifford, Gong-Bo Zhao, Baojiu Li, Kazuya Koyama, Robert C. Nichol. Institute of Cosmology & Gravitation; Research output: Contribution to journal › Article › peer-review.
  8. semanticscholar.org

    FIG. 1. The z ¼ 0 gravitational potential ratio between high and low mass bins of synthetic galaxy clusters for the GR (black), the FR5 (left) parametrization of fðRÞ gravity (green), and the FR6 (right) parametrization (red). The points are the average of the square of the observed escape velocities for each bin in radius and mass. The errors are 1σ on the mean from bootstrap resampling ...
  9. link.springer.com

    Galaxy clusters have been also employed to probe a broader part of the theory space of scalar-tensor theories, beyond a conformal coupling. In particular, the so-called Beyond Hortndeski theories have been shown to exhibit an intriguing breaking of the Vainshtein mechanism within compact matter sources such as stars or galaxy clusters.
  10. link.aps.org

    We develop a probe of gravity which compares high mass clusters, where Chameleon effects are weak, to low mass clusters, where the effects can be strong. We utilize the escape velocity edges in the radius/velocity phase space to infer the gravitational potential profiles on scales of 0.3-1 virial radii.

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