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  1. pure.port.ac.uk

    galaxies. We show that main-sequence stars are colder, less luminous and more ephemeral than general relativity predicts. Furthermore, the circular velocities of objects orbiting inside galaxies are slower and the lensing of light is weaker. We discuss the prospects for testing these theories using the novel phenomena presented here in light of ...
    Author:Jeremy Sakstein, Kazuya KoyamaPublished:2015
  2. worldscientific.com

    The Vainshtein mechanism is of paramount importance in many alternative theories of gravity. It hides deviations from general relativity (GR) in the solar system while allowing them to drive the ac...
    Author:Jeremy Sakstein, Kazuya KoyamaPublished:2015
  3. semanticscholar.org

    The Vainshtein mechanism is of paramount importance in many alternative theories of gravity. It hides deviations from general relativity (GR) in the solar system while allowing them to drive the acceleration of the cosmic expansion. Recently, a class of theories have emerged where the mechanism is broken inside astrophysical objects. In this essay, we look for novel probes of these theories by ...
  4. inspirehep.net

    Testing the Vainshtein mechanism using stars and galaxies. Jeremy Sakstein (Portsmouth U., ICG), Kazuya Koyama (Portsmouth U., ICG) Nov 13, 2015. 7 pages. ... In this essay, we look for novel probes of these theories by deriving the modified properties of stars and galaxies. We show that main-sequence stars are colder, less luminous and more ...
  5. Ghost-free theories beyond the Horndeski class exhibit a partial breaking of the Vainshtein mechanism inside non-relativistic sources of finite extent. We exploit this breaking to identify new and novel astrophysical probes of these theories. Non-relativistic objects feel a gravitational force that is weaker than that predicted by general relativity. The new equation of hydrostatic equilibrium ...
    Author:Kazuya Koyama, Jeremy SaksteinPublished:2015
  6. researchportal.port.ac.uk

    Testing the Vainshtein mechanism using stars and galaxies. Jeremy Sakstein, Kazuya Koyama. Institute of Cosmology & Gravitation; Research output: Contribution to journal › Article › peer-review. 139 Downloads (Pure) Overview; Projects (1) Original language: English: Journal: International Journal of Modern Physics D:
  7. VAINSHTEIN MECHANISM Theories that screen using the Vainshtein mechanism are abundant in the literature (see [4] for example) and galileons are the most common paradigm by far. These are de ned in the decoupling limit by the following La-grangian2: L= M pl 2 X i L i 2(i 2) + ˚T+ T @ ˚@ ˚ M4; (1) where T is the energy-momentum tensor in the ...
  8. researchgate.net

    Compared with the staple, rotation-curve tests, MOND is here tested in a wider population of galaxies, through a different phenomenon, using relativistic test objects, and is probed to several ...
  9. Ghost-free theories beyond the Horndeski class exhibit a partial breaking of the Vainshtein mechanism inside non-relativistic sources of finite extent. We... Skip to main content. Due to a planned power outage on Friday, 1/14, between 8am-1pm PST, some services may be impacted.

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