CMB Observables and Their Cosmological Implications
By Wayne Hu, M. Fukugita, M. Zaldarriaga, Max Tegmark. 2000
159 citations recorded by the source corpus.
We show that recent measurements of the power spectrum of cosmic microwave background anisotropies by BOOMERanG and MAXIMA can be characterized by four observables, the position of the first acoustic peak l_1= 206 pm 6, the height of the first peak relative to COBE normalization H_1= 7.6 pm 1.4, the height of the second peak relative to the first H_2 = 0.38 pm 0.04, and the height of the third peak relative to the first H_3 = 0.43 pm 0.07. This phenomenological representation of the measurements complements more detailed likelihood analyses in multidimensional parameter space, clarifying the dependence on prior assumptions and the specific aspects of the data leading to the constraints. We illustrate their use in the flat LCDM family of models, where we find Omega_m h^{3.8} > 0.079 (or nearly equivalently, the age of the universe t_0 0.019, a matter density Omega_m h^2 0.85 from the peak heights (95% CL). With the aid of several external constraints, notably nucleosynthesis, the age of the universe and the cluster abundance and baryon fraction, we construct the allowed region in the (Omega_m,h) plane; it points to high h (0.6< h < 0.9) and moderate Omega_m (0.25 < Omega_m < 0.6).
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/d6c8fbf9d6a78b4c09bb7162e66b169d3a2e5f10
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In Astronomy and Astrophysics
- V. Poulin
- Tanvi Karwal
- Tristan L. Smith
- M. Kamionkowski
- M. Sloth
- Florian Niedermann
- C. Hirata
- Oliver Zahn
In Nuclear and High Energy Physics
- Tanvi Karwal
- V. Poulin
- Tristan L. Smith
- M. Sloth
- Florian Niedermann
- M. Kamionkowski
- Oliver Zahn
- C. Hirata
Citations in the corpus
- Resolving the Hubble tension with new early dark energy (2020, background): “The decay of the Weyl potential during the radiation dominated epoch leads to driving effects in the photon-baryon fluid [91].”
- Early Dark Energy can Resolve the Hubble Tension. (2018, background): “Within the context of ΛCDM, a simplified picture of the CMB power spectrum can be described by three angular scales: `eq (the projected Hubble horizon at matter-radiation equality), `s (the projected photon-baryon sound-horizon at decoupling), and `D (the projected Silk damping scale at decoupling) ”
- The Atacama Cosmology Telescope: cosmological parameters from three seasons of data (2013, unknown): “Extra relativistic energy density damps the small-scale CMB power — see [94] for a concise recent review, and the discussions in [9, 79, 96, 97, 116, 177].”