RECORD
Dark Energy Probes in Light of the CMB
Astrophysics · Submitted 7 Jul 2004
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The single most important complement to the CMB for measuring the dark energy equation of state at z~0.5 is a determination of the Hubble constant to better than a few percent.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
CMB observables have largely fixed the expansion history of the universe in the deceleration regime and provided two self-calibrated absolute standards for dark energy studies: the sound horizon at recombination as a standard ruler and the amplitude of initial density fluctuations. We review these inferences and expose the testable assumptions about recombination and reionization that underly them. Fixing the deceleration regime with CMB observables, deviations in the distance and growth observables appear most strongly at z=0 implying that accurate calibration of local and CMB standards may be more important than redshift range or depth. The single most important complement to the CMB for measuring the dark energy equation of state at z~0.5 is a determination of the Hubble constant to better than a few percent. Counterintuitively, with fixed fractional distance errors and relative standards such as SNe, the Hubble constant measurement is best achieved in the high redshift deceleration regime. Degeneracies between the evolution and current value of the equation of state or between its value and spatial curvature can be broken if percent level measurement and calibration of distance standards can be made at intermediate redshifts or the growth function at any redshift in the acceleration regime. We compare several dark energy probes available to a wide and deep optical survey: baryon features in galaxy angular power spectra and the growth rate from galaxy-galaxy lensing, shear tomography and the cluster abundance.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | CMB observables have largely fixed the expansion history of the universe in the deceleration regime and provided two self-calibrated absolute standards for dark energy studies: the sound horizon at recombination as a standard ruler and the amplitude of initial density fluctuations. | background 0.98 | 0.09 | 0.09 | asserted 1.00 |
| s1 | We review these inferences and expose the testable assumptions about recombination and reionization that underly them. | contribution 0.96 | 0.59 | 0.05 | asserted 0.74 |
| s2 | Fixing the deceleration regime with CMB observables, deviations in the distance and growth observables appear most strongly at z=0 implying that accurate calibration of local and CMB standards may be more important than redshift range or depth. | interpretation 0.75 | 0.50 | 0.30 | hedged possibility 0.53 |
| s3 | The single most important complement to the CMB for measuring the dark energy equation of state at z~0.5 is a determination of the Hubble constant to better than a few percent. | result 0.71 | 0.29 | 0.29 | asserted 0.99 |
| s4 | Counterintuitively, with fixed fractional distance errors and relative standards such as SNe, the Hubble constant measurement is best achieved in the high redshift deceleration regime. | result 0.67 | 0.31 | 0.10 | asserted 1.00 |
| s5 | Degeneracies between the evolution and current value of the equation of state or between its value and spatial curvature can be broken if percent level measurement and calibration of distance standards can be made at intermediate redshifts or the growth function at any redshift in the acceleration regime. | interpretation 0.65 | 0.17 | 0.15 | hedged possibility 0.51 |
| s6 | We compare several dark energy probes available to a wide and deep optical survey: baryon features in galaxy angular power spectra and the growth rate from galaxy-galaxy lensing, shear tomography and the cluster abundance. | contribution 0.79 | 0.37 | 0.05 | asserted 0.83 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
CMB observables have largely fixed the expansion history of the universe in the deceleration regime and provided two self-calibrated absolute standards for dark energy studies: the sound horizon at recombination as a standard ruler and the amplitude of initial density fluctuations. We review these inferences and expose the testable assumptions about recombination and reionization that underly them. Fixing the deceleration regime with CMB observables, deviations in the distance and growth observables appear most strongly at z=0 implying that accurate calibration of local and CMB standards may be more important than redshift range or depth. The single most important complement to the CMB for measuring the dark energy equation of state at z~0.5 is a determination of the Hubble constant to better than a few percent. Counterintuitively, with fixed fractional distance errors and relative standards such as SNe, the Hubble constant measurement is best achieved in the high redshift deceleration regime. Degeneracies between the evolution and current value of the equation of state or between its value and spatial curvature can be broken if percent level measurement and calibration of distance standards can be made at intermediate redshifts or the growth function at any redshift in the acceleration regime. We compare several dark energy probes available to a wide and deep optical survey: baryon features in galaxy angular power spectra and the growth rate from galaxy-galaxy lensing, shear tomography and the cluster abundance.
Human review
References
How the literature uses it
20 arXiv papers cite this in 25 sentences
Papers citing it · 19 sentences without a confident label
Uses its method or tool 1 paper
-
We calculate the sound horizon and redshift of recombination according to the fitting formulas given in [ref] .
Geometrical constraints on curvature from galaxy-lensing cross-correlations · Adding in BAO and CMB · 0.98
Cites it as background 5 papers
-
The main effects of dark energy and curvature on the CMB enter through the distance to recombination at $z_*≈1089$ [ref] and the matter density $$, which affect the angular scale and amplitude of the acoustic peaks [ref] .
Testing flatness of the universe with probes of cosmic distances and growth · Distances · 0.89
-
Importantly the measurement of the baryon acoustic oscillation(BAO) is the standard ruler which exhibit the distribution(not random) of the energy density fluctuation of the matter at a very large scale [ref] .
Pure Natural Quintessential Inflation and Dark Energy · Introduction · 0.86
-
The primary temperature and polarization anisotropies best measure the density ratio of matter to radiation (and of baryons to photons) around peak visibility, i.e., around hydrogen recombination [ref] .
Dark forces suppress structure growth · Generation of anisotropies at last scattering · 0.82
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.