Conveners
Cosmology I
- Arthur Kosowsky
I will review the results of our direct numerical simulations of magnetohydrodynamic turbulence in the early universe: I will discuss the stochastic background of gravitational waves and relic magnetic fields produced from the early-universe turbulence. These simulations do not make the simplifying assumptions of earlier analytic calculations. If the turbulence is assumed to have an...
In this talk, a discussion of gravitational wave calculations from an expanding universe will be presented. Details include changes to the dynamics of a cosmological first order phase transition, behaviors of the sources for gravitational wave production and the modified gravitational waves. Possible
applications to a non-standard cosmological history such as the existence of an early matter...
I explore the possibility of detecting gravitational waves generated by first order phase transitions in multiple dark sectors. Nnaturalness is taken as a sample model that features multiple additional sectors, many of which undergo phase transitions that produce gravitational waves. I examine the cosmological history of this framework and determine the gravitational wave profiles generated....
Understanding spin effects in the evolution of compact object binaries is essential to proper interpretation of waveforms from gravitational wave observatories such as LIGO. Spin degrees of freedom can be incorporated naturally into a post-Newtonian expansion during the binary’s inspiral phase. During this regime of a binary merger, there is a clear separation of scales between the radius of...
We study the gravitational wave background from a first order phase transition generated during standard and nonstandard cosmological histories. We analyze the hydrodynamic properties of the plasma to define a self-similar invariant velocity profile to be utilized in the Sound Shell Model for acoustic gravitational wave production. We show that the relevant equations in an expanding universe...
Oscillation in the bispectrum of density perturbations uniquely signifies the production of heavy fields during inflation, making it an important probe of physics at high energy scales. However, the magnitude of this non-gaussianity suffers Boltzmann-like suppression in models with minimal interaction between the inflaton and heavy fields, limiting the range of masses that can be probed close...
It is known that the Higgs potential in the Standard Model can drive successful inflation as long as the Higgs field couples non-minimally to gravity. It is then inevitable to take into account the loop corrections of the Standard Model particles to the Higgs potential in the Higgs inflation. In this talk, we discuss the one-loop corrections at finite temperature to the curvature perturbation...
