Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity
The large-scale structure of the Universe supplies crucial information about the physical processes at play at early times. Unresolved maps of the intensity of 21 cm emission from neutral hydrogen HI at redshifts z~1-5 are the best hope of accessing the ultralarge-scale information, directly related...
| Asıl Yazarlar: | , , , |
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| Materyal Türü: | Journal article |
| Baskı/Yayın Bilgisi: |
2013
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| _version_ | 1826298708218609664 |
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| author | Camera, S Santos, MG Ferreira, P Ferramacho, L |
| author_facet | Camera, S Santos, MG Ferreira, P Ferramacho, L |
| author_sort | Camera, S |
| collection | OXFORD |
| description | The large-scale structure of the Universe supplies crucial information about the physical processes at play at early times. Unresolved maps of the intensity of 21 cm emission from neutral hydrogen HI at redshifts z~1-5 are the best hope of accessing the ultralarge-scale information, directly related to the early Universe. A purpose-built HI intensity experiment may be used to detect the large scale effects of primordial non-Gaussianity, placing stringent bounds on different models of inflation. We argue that it may be possible to place tight constraints on the non-Gaussianity parameter f_NL, with an error close to ~1. |
| first_indexed | 2024-03-07T04:50:57Z |
| format | Journal article |
| id | oxford-uuid:d4eee5ea-6dc3-4c51-b9e4-22f103b55bfc |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:50:57Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:d4eee5ea-6dc3-4c51-b9e4-22f103b55bfc2022-03-27T08:22:22ZCosmology on Ultralarge Scales with Intensity Mapping of the Neutral Hydrogen 21 cm Emission: Limits on Primordial Non-GaussianityJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d4eee5ea-6dc3-4c51-b9e4-22f103b55bfcSymplectic Elements at Oxford2013Camera, SSantos, MGFerreira, PFerramacho, LThe large-scale structure of the Universe supplies crucial information about the physical processes at play at early times. Unresolved maps of the intensity of 21 cm emission from neutral hydrogen HI at redshifts z~1-5 are the best hope of accessing the ultralarge-scale information, directly related to the early Universe. A purpose-built HI intensity experiment may be used to detect the large scale effects of primordial non-Gaussianity, placing stringent bounds on different models of inflation. We argue that it may be possible to place tight constraints on the non-Gaussianity parameter f_NL, with an error close to ~1. |
| spellingShingle | Camera, S Santos, MG Ferreira, P Ferramacho, L Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity |
| title | Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral
Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity |
| title_full | Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral
Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity |
| title_fullStr | Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral
Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity |
| title_full_unstemmed | Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral
Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity |
| title_short | Cosmology on Ultralarge Scales with Intensity Mapping of the Neutral
Hydrogen 21 cm Emission: Limits on Primordial Non-Gaussianity |
| title_sort | cosmology on ultralarge scales with intensity mapping of the neutral hydrogen 21 cm emission limits on primordial non gaussianity |
| work_keys_str_mv | AT cameras cosmologyonultralargescaleswithintensitymappingoftheneutralhydrogen21cmemissionlimitsonprimordialnongaussianity AT santosmg cosmologyonultralargescaleswithintensitymappingoftheneutralhydrogen21cmemissionlimitsonprimordialnongaussianity AT ferreirap cosmologyonultralargescaleswithintensitymappingoftheneutralhydrogen21cmemissionlimitsonprimordialnongaussianity AT ferramachol cosmologyonultralargescaleswithintensitymappingoftheneutralhydrogen21cmemissionlimitsonprimordialnongaussianity |