CMB WITH QUINTESSENCE: ANALYTIC APPROACH AND CMBFAST
نویسندگان
چکیده
منابع مشابه
CMB with Quintessence: Analytic Approach and CMBFAST
A particular kind of quintessence is considered, with equation of motion pQ/ρQ = −1, corresponding to a cosmological term with time-dependence Λ(t) = Λ(t0)(R(t0)/R(t)) which we examine initially for 0 ≤ P < 3. Energy conservation is imposed, as is consistency with big-bang nucleosynthesis, and the range of allowed P is thereby much restricted to 0 ≤ P < 0.2. The position of the first Doppler pe...
متن کاملCoupled Quintessence and Cmb
We revise the stability of the tracking solutions and briefly review the potentials of quintessence models. We discuss the evolution of linear perturbations for V (φ) = V0 exp(λφ2/2) potential in which the scalar field is non-minimally coupled to cold dark matter. We consider the effects of this coupling on both cosmic microwave background temperature anisotropies and matter perturbations. We f...
متن کاملCoupling of quintessence to pseudoscalar of electromagnetism and CMB polarization
We present the full set of power spectra of cosmic microwave background (CMB) temperature and polarization anisotropies due to the coupling between quintessence and pseudoscalar of electromagnetism. This coupling induces the rotation of the polarization plane of CMB photons, thus resulting in non-vanishing B mode and parity-violating TB and EB modes. Using the 2003 flight of BOOMERANG (B03) dat...
متن کاملAnalytic Approach to CMB Beam Systematics: Effect on Inflation Science, Lensing Extraction and Cosmic Birefringence
The CMB’s B-mode polarization provides a handle on several cosmological parameters most notably the tensor-to-scalar ratio, r, and is sensitive to parameters which govern the growth of large scale structure (LSS) and evolution of the gravitational potential. These imprint CMB temperature anisotropy and cause E-to-B-mode polarization conversion via gravitational lensing. The CMB has also the pot...
متن کاملAnalytic marginalization over CMB calibration and beam uncertainty
With the increased accuracy and angular scale coverage of the recent CMB experiments it has become important to include calibration and beam uncertainties when estimating cosmological parameters. This requires an integration over possible values of the calibration and beam size, which can be performed numerically but greatly increases computation times. We present a fast and general method for ...
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: Modern Physics Letters A
سال: 2001
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732301003097