Raising the reionization optical depth with inflationary CMB features

arXiv:2606.20795 · astro-ph.CO · Submitted 2026-06-18 · Read on arXiv

Tanisha Jhaveri, Wayne Hu, Vivian Miranda

astro-ph.CO

Submitted: 2026-06-18

Code: https://github.com/lesgourg/class_public

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Anisotropy — 14× in this paper · explained in 3 episodes
• Robustness — 4× in this paper · explained in 5 episodes
• Consistency — 3× in this paper · explained in 3 episodes
• South Pole Telescope — 2× in this paper
• ACT Data — 1× in this paper · explained in 1 episode
• Atacama Cosmology Telescope — 1× in this paper
• Cosmic Linear Anisotropy Solving System — 1× in this paper
• Dark Energy Spectroscopic Instrument — 1× in this paper
• Generalization — 1× in this paper · explained in 13 episodes
• Gravitational Lensing — 1× in this paper · explained in 2 episodes

Sources

• Wilkinson Microwave Anisotropy Probe (WMAP) First Year Observations: TE Polarization
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Planck 2013 results. XVI. Cosmological parameters
• Planck 2015 results. XIII. Cosmological parameters
• Planck 2018 results. VI. Cosmological parameters
• Reionization optical depth determination from Planck HFI data with ten percent accuracy
• Planck intermediate results. LI. Features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• Turning a negative neutrino mass into a positive optical depth
• Dispu$\tau$able: the high cost of a low optical depth
• The Complete CEERS Early Universe Galaxy Sample: A Surprisingly Slow Evolution of the Space Density of Bright Galaxies at z ~ 8.5-14.5
• Early results from GLASS-JWST. III: Galaxy candidates at z$\sim$9-15
• Overview of the JWST Advanced Deep Extragalactic Survey (JADES)
• A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
• Planck 2018 results. VII. Isotropy and Statistics of the CMB
• Evidence for horizon-scale power from CMB polarization
• Reionization optical depth and CMB-BAO tension in punctuated inflation
• Updated Constraints on Infrared Cutoff Models and Implications for Large-Scale CMB Anomalies
• Inflationary vs. Reionization Features from Planck 2015 Data
• Generalized Slow Roll for Large Power Spectrum Features

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