J
Jeremy Sakstein
Researcher at University of Pennsylvania
Publications - 89
Citations - 5697
Jeremy Sakstein is an academic researcher from University of Pennsylvania. The author has contributed to research in topics: Dark energy & General relativity. The author has an hindex of 32, co-authored 77 publications receiving 4435 citations. Previous affiliations of Jeremy Sakstein include Institute of Cosmology and Gravitation, University of Portsmouth & University of Portsmouth.
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Towards viable cosmological models of disformal theories of gravity
TL;DR: In this article, the late-time cosmological dynamics of disformal gravity are investigated using dynamical systems methods and it is shown that in the general case there are no stable attractors that screen fifth forces locally and simultaneously describe a dark energy dominated universe.
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Stellar oscillations in modified gravity
TL;DR: In this paper, the authors derived the equations of motion governing linear, adiabatic, radial perturbations of stars in scalar-tensor theories, and investigated these effects numerically using both polytropic Lane-Emden stars and models coming from modified gravity stellar structure simulations.
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Astrophysical Tests of Modified Gravity: Stellar and Gaseous Rotation Curves in Dwarf Galaxies
Vinu Vikram,Vinu Vikram,Jeremy Sakstein,Jeremy Sakstein,Jeremy Sakstein,Charles H.F. Davis,Andrew Neil +6 more
TL;DR: In this paper, the authors exploit the chameleon theory of gravity to obtain new constraints on the model parameters using the measured rotation curves of six low surface brightness galaxies, and find that the constraints from Cepheid variable stars are currently more competitive than the bounds obtained here but they are able to rule out self-screening parameters.
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Solar system constraints on disformal gravity theories
TL;DR: In this article, the authors derive the solution for a static isolated mass in generic disformal gravity theories and transform it into the parameterised post-Newtonian form, and derive the constraints placed on such theories by local tests of gravity.
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Pixelated Dark Energy
TL;DR: In this article, the authors study the phenomenology of a string construction with a quantum mechanically stable dark energy and show that the cosmological constant scales as Θ(Lambda \sim 1/N) in the pixel number.