Constraints on Cosmic Acceleration Using Large-scale Structure Formation
نویسندگان
چکیده
منابع مشابه
Cosmic Ray Acceleration during Large Scale Structure Formation
Clusters of galaxies are storage rooms of cosmic rays. They confine the hadronic component of cosmic rays over cosmological time scales due to diffusion, and the electron component due to energy losses. Hadronic cosmic rays can be accelerated during the process of structure formation, because of the supersonic motion of gas in the potential wells created by dark matter. At the shock waves that ...
متن کاملLarge-scale peculiar motions and cosmic acceleration
Observers with small, but finite, peculiar velocities relative to the Hubble flow can measure a negative deceleration parameter, although the universe may be actually decelerating. The effect is local but it can affect large enough scales to give the impression that the whole universe had recently entered an accelerated phase. We outline the key features of the accelerating mechanism and discus...
متن کاملProbing Newton’s constant on vast scales: Dvali-Gabadadze-Porrati gravity, cosmic acceleration, and large scale structure
The nature of the fuel that drives today’s cosmic acceleration is an open and tantalizing mystery. The brane-world theory of Dvali, Gabadadze, and Porrati ~DGP! provides a context where late-time acceleration is driven not by some energy-momentum component ~dark energy!, but rather is the manifestation of the excruciatingly slow leakage of gravity off our four-dimensional world into an extra di...
متن کاملProbing Newton’s Constant on Vast Scales: DGP Gravity, Cosmic Acceleration and Large Scale Structure
The nature of the fuel that drives today’s cosmic acceleration is an open and tantalizing mystery. The braneworld theory of Dvali, Gabadadze, and Porrati (DGP) provides a context where late-time acceleration is driven not by some energy-momentum component (dark energy), but rather is the manifestation of the excruciatingly slow leakage of gravity off our four-dimensional world into an extra dim...
متن کاملConstraints on gravity on cosmic scales with upcoming large-scale structure surveys.
We consider how upcoming, prospective large-scale structure surveys, measuring galaxy weak lensing and position in tandem with the cosmic microwave background temperature anisotropies, constrain cosmic scale modifications to general relativity. In such theories, both the homogeneous expansion history and the growth of large-scale structure can have signatures of the modification. We consider an...
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 and High Technology
سال: 2011
ISSN: 1225-2336
DOI: 10.3938/phit.20.057