#### Filter Results:

- Full text PDF available (76)

#### Publication Year

1982

2019

- This year (5)
- Last 5 years (28)
- Last 10 years (54)

#### Supplemental Content

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

If we assume that the cosmic energy density will remain constant or strictly increase in the future, then the possible fates for the universe can be divided into four categories based on the time… (More)

Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235(Dated: September 18, 2014)We examine the cosmological consequences of an alternative to the standard expression for… (More)

The generalized Chaplygin gas is characterized by the equation of state p=-A/{rho}{sup {alpha}}, with {alpha}>-1 and w>-1. We generalize this model to allow for the cases where {alpha}<-1 or w<-1.… (More)

Abstract We examine in more detail specific models which yield a little rip cosmology, i.e., a universe in which the dark energy density increases without bound but the universe never reaches a… (More)

Abstract We consider dark matter (DM) that interacts with ordinary matter exclusively through an electromagnetic anapole, which is the only allowed electromagnetic form factor for Majorana fermions.… (More)

We examine k-essence models in which the Lagrangian p is a function only of the derivatives of a scalar field phi and does not depend explicity on phi. The evolution of phi for an arbitrary… (More)

We study the effect on the cosmic microwave background (CMB) anisotropy and large scale structure (LSS) power spectrum of a scattering interaction between cold dark matter and baryons. This… (More)

We examine models in which the dark energy density increases with time (so that the equation-of-state parameter w satisfies w < -1), but w approaches -1 asymptotically, such that there is no future… (More)

Energy injected into the cosmic microwave background at redshifts z{approx} (equivalent to){sigma}{sub 0}, the bound is f(m{sub X}/MeV){sup -1}[({sigma}{sub 0}/6x10{sup -27} cm{sup 3}s{sup… (More)

Cosmic microwave background (CMB) observations suggest the possibility of an extra dark radiation component, while the current evidence from big bang nucleosynthesis (BBN) is more ambiguous. Dark… (More)