Cosmology and Nongalactic Astrophysics · arXiv:1105.1773 v2 · submitted 9 May 2011
Primordial non-Gaussianity from the 21 cm Power Spectrum during the Epoch of Reionization
The paper says
“We show that experiments such as SKA and MWA could measure f_NL values of order 10.”
from the abstract · picked out as the main claim by a classifier
Reviews
Reviews by people
No person has reviewed this paper on Pith yet. A scientist listed on Pith can review it for a fee, and their review is published here whatever it concludes.
The paper
Abstract
Primordial non-Gaussianity is a crucial test of inflationary cosmology. We consider the impact of non-Gaussianity on the ionization power spectrum from 21 cm emission during the epoch of reionization. We focus on the power spectrum on large scales at redshifts of 7 to 8 and explore the expected constraint on the local non-Gaussianity parameter f_NL for current and next-generation 21 cm experiments. We show that experiments such as SKA and MWA could measure f_NL values of order 10. This can be improved by an order of magnitude with a fast-Fourier transform telescope like Omniscope.
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. No sentence in this record was written by a model.
abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: hedged possibility 0.94
What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.12 · human participants 0.01 · controlled comparison 0.04 · randomized assignment 0.01 · states quantitative result 0.96 · compares with prior results 0.18 · mentions code or data availability 0.02
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| Primordial non-Gaussianity is a crucial test of inflationary cosmology. | background 1.00 | 0.03 | 0.03 | asserted 1.00 |
| We consider the impact of non-Gaussianity on the ionization power spectrum from 21 cm emission during the epoch of reionization. | contribution 1.00 | 0.70 | 0.04 | unclear 0.62 |
| We focus on the power spectrum on large scales at redshifts of 7 to 8 and explore the expected constraint on the local non-Gaussianity parameter f_NL for current and next-generation 21 cm experiments. | contribution 0.87 | 0.64 | 0.11 | asserted 0.61 |
| We show that experiments such as SKA and MWA could measure f_NL values of order 10. | result 1.00 | 0.80 | 0.50 | hedged possibility 0.94 |
| This can be improved by an order of magnitude with a fast-Fourier transform telescope like Omniscope. | result 0.81 | 0.61 | 0.24 | hedged possibility 0.71 |
What kind of paper the classifier reports this is: theoretical result 0.93 · evidence from simulation or computation 0.46
What was examined, and what was not
Sources read
- arXiv listing abstract v2
Not examined
- full text
- figures and tables
- references and citing sentences
- relations to other papers
Levels run
- P abstract
Not run
- S sections
- T body sentences
- C citations
- R cross-paper relations
How the labels were made
Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,242 input tokens, $0.0002 reported.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
Cited by 3 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- The 21 cm signal and the interplay between dark matter annihilations and astrophysical processes astro-ph.CO · Mar 2016
- Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity astro-ph.CO · May 2013
- The Hunt for Primordial Interactions in the Large Scale Structures of the Universe astro-ph.CO · Jun 2019
How the literature uses it
10 arXiv papers cite this in 14 sentences
Papers citing it · 13 sentences without a confident label
Cites it as background 1 paper
-
The feasibility study to constrain the primordial non-Gaussianity parameters through 21 cm observations has been performed with considering the various aspects of 21 cm signatures of the primordial non-Gaussianity [ref] .
Probing primordial non-Gaussianity with 21 cm fluctuations from minihalos · Introduction · 0.81
Challenges and discussion
Know something about this paper? Leave a comment.
Come back by email
A short list of the week's newly reviewed papers. Nothing is sent until you confirm from your inbox, and every email has a link that stops it. No account.
No comments yet.
Sign in to comment