Darkness without dark matter and energy – generalized unimodular gravity
نویسندگان
چکیده
منابع مشابه
Conformal Gravity: Dark Matter and Dark Energy
This short review examines recent progress in understanding dark matter, dark energy, and galactic halos using theory that departs minimally from standard particle physics and cosmology. Strict conformal symmetry (local Weyl scaling covariance), postulated for all elementary massless fields, retains standard fermion and gauge boson theory but modifies Einstein–Hilbert general relativity and the...
متن کاملConstraining TeVeS Gravity as Effective Dark Matter and Dark Energy
The phenomena customly described with the standard ΛCDM model are broadly reproduced by an extremely simple model in TeVeS, Bekenstein’s (2004) modification of General Relativity motivated by galaxy phenomenology. Our model can account for the acceleration of the universe seen in SNeIa distances without a cosmological constant, and the accelerations seen rotation curves of nearby spiral galaxie...
متن کاملSeparating dark physics from physical darkness: Minimalist modified gravity versus dark energy
The acceleration of the cosmic expansion may be due to a new component of physical energy density or a modification of physics itself. Mapping the expansion of cosmic scales and the growth of large scale structure in tandem can provide insights to distinguish between the two origins. Using Minimal Modified Gravity (MMG)—a single parameter gravitational growth index formalism to parametrize modi...
متن کاملDark Matter, Quantum Gravity, Vacuum Energy, and Lorentz Invariance
In earlier work , we introduced a theory which implies violation of Lorentz invariance for (i) fermions at extremely high energy and (ii) fundamental scalar bosons which have not yet been observed. On the other hand, the theory appears to be in agreement with even the most sensitive experimental and observational tests of Lorentz invariance that are currently available, since many features of t...
متن کاملModified Gravity: Cosmology without dark matter or a cosmological constant
We explore the cosmological consequences of Modified Gravity (MOG), and find that it provides, using a minimal number of parameters, good fits to data, including CMB temperature anisotropy, galaxy mass power spectrum, and supernova luminosity-distance observations. The MOG cosmology is flat and predicts an age of the universe of ∼ 34 billion years.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 2017
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2017.09.045