Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations
ABSTRACT: We study the effects of a class of features of the potential of slow-roll inflationary models corresponding to a step symmetrically dumped by an even power negative exponential factor, which we call local features. Local-type features differ from other branch-type features considered previ...
- Autores:
-
Gallego Cadavid, Alexander
Romano, Antonio Enea
Gariazzo, Stefano
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2016
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/44324
- Acceso en línea:
- https://hdl.handle.net/10495/44324
- Palabra clave:
- Cosmología
Cosmology
Radiación de fondo
Radiation background
Ondas electromagnéticas
Electromagnetic waves
Análisis espectral
Spectrum analysis
Radiación de Fondo Cósmico de Microondas (CMB)
Potencial de inflación
- Rights
- openAccess
- License
- https://creativecommons.org/licenses/by/4.0/
| id |
UDEA2_bd2b3e8ea5ee7b6cf1e6912f2e8cc968 |
|---|---|
| oai_identifier_str |
oai:bibliotecadigital.udea.edu.co:10495/44324 |
| network_acronym_str |
UDEA2 |
| network_name_str |
Repositorio UdeA |
| repository_id_str |
|
| dc.title.spa.fl_str_mv |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations |
| title |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations |
| spellingShingle |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations Cosmología Cosmology Radiación de fondo Radiation background Ondas electromagnéticas Electromagnetic waves Análisis espectral Spectrum analysis Radiación de Fondo Cósmico de Microondas (CMB) Potencial de inflación |
| title_short |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations |
| title_full |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations |
| title_fullStr |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations |
| title_full_unstemmed |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations |
| title_sort |
Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations |
| dc.creator.fl_str_mv |
Gallego Cadavid, Alexander Romano, Antonio Enea Gariazzo, Stefano |
| dc.contributor.author.none.fl_str_mv |
Gallego Cadavid, Alexander Romano, Antonio Enea Gariazzo, Stefano |
| dc.contributor.researchgroup.spa.fl_str_mv |
COSMOGRAV Grupo de Fenomenología de Interacciones Fundamentales |
| dc.subject.lemb.none.fl_str_mv |
Cosmología Cosmology Radiación de fondo Radiation background Ondas electromagnéticas Electromagnetic waves Análisis espectral Spectrum analysis |
| topic |
Cosmología Cosmology Radiación de fondo Radiation background Ondas electromagnéticas Electromagnetic waves Análisis espectral Spectrum analysis Radiación de Fondo Cósmico de Microondas (CMB) Potencial de inflación |
| dc.subject.proposal.spa.fl_str_mv |
Radiación de Fondo Cósmico de Microondas (CMB) Potencial de inflación |
| description |
ABSTRACT: We study the effects of a class of features of the potential of slow-roll inflationary models corresponding to a step symmetrically dumped by an even power negative exponential factor, which we call local features. Local-type features differ from other branch-type features considered previously, because the potential is only affected in a limited range of the scalar field value, and they are symmetric with respect to the location of the feature. This type of feature only affects the spectrum and bispectrum in a narrow range of scales which leave the horizon during the time interval corresponding to the modification of the potential. On the contrary branch-type features have effects on all the perturbation modes leaving the horizon when the field value is within the interval defining the branch, introducing for example differences in the power spectrum between large and small scale which are absent in the case of local-type features. The spectrum and bispectrum of primordial curvature perturbations are affected by oscillations around the scale k0 exiting the horizon at the time τ0 corresponding to the feature. We also compute the effects of the features on the CMB temperature and polarization spectra, showing the effects of different choices of parameters. |
| publishDate |
2016 |
| dc.date.issued.none.fl_str_mv |
2016 |
| dc.date.accessioned.none.fl_str_mv |
2025-01-22T20:26:16Z |
| dc.date.available.none.fl_str_mv |
2025-01-22T20:26:16Z |
| dc.type.spa.fl_str_mv |
Artículo de investigación |
| dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_2df8fbb1 |
| dc.type.redcol.spa.fl_str_mv |
https://purl.org/redcol/resource_type/ART |
| dc.type.coarversion.spa.fl_str_mv |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.driver.spa.fl_str_mv |
info:eu-repo/semantics/article |
| dc.type.version.spa.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
| format |
http://purl.org/coar/resource_type/c_2df8fbb1 |
| status_str |
publishedVersion |
| dc.identifier.citation.spa.fl_str_mv |
Gallego-Cadavid, A., Romano, A.E. & Gariazzo, S. Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations. Eur. Phys. J. C 76, 385 (2016). https://doi.org/10.1140/epjc/s10052-016-4232-4 |
| dc.identifier.issn.none.fl_str_mv |
1434-6044 |
| dc.identifier.uri.none.fl_str_mv |
https://hdl.handle.net/10495/44324 |
| dc.identifier.doi.none.fl_str_mv |
10.1140/epjc/s10052-016-4232-4 |
| dc.identifier.eissn.none.fl_str_mv |
1434-6052 |
| identifier_str_mv |
Gallego-Cadavid, A., Romano, A.E. & Gariazzo, S. Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations. Eur. Phys. J. C 76, 385 (2016). https://doi.org/10.1140/epjc/s10052-016-4232-4 1434-6044 10.1140/epjc/s10052-016-4232-4 1434-6052 |
| url |
https://hdl.handle.net/10495/44324 |
| dc.language.iso.spa.fl_str_mv |
eng |
| language |
eng |
| dc.relation.ispartofjournalabbrev.spa.fl_str_mv |
Eur. Phys. J. C. |
| dc.relation.citationendpage.spa.fl_str_mv |
14 |
| dc.relation.citationissue.spa.fl_str_mv |
385 |
| dc.relation.citationstartpage.spa.fl_str_mv |
1 |
| dc.relation.citationvolume.spa.fl_str_mv |
76 |
| dc.relation.ispartofjournal.spa.fl_str_mv |
European Physical Journal C |
| dc.rights.uri.spa.fl_str_mv |
https://creativecommons.org/licenses/by/4.0/ |
| dc.rights.uri.*.fl_str_mv |
http://creativecommons.org/licenses/by/2.5/co/ |
| dc.rights.accessrights.spa.fl_str_mv |
info:eu-repo/semantics/openAccess |
| dc.rights.coar.spa.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
| rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/2.5/co/ http://purl.org/coar/access_right/c_abf2 |
| eu_rights_str_mv |
openAccess |
| dc.format.extent.spa.fl_str_mv |
14 páginas |
| dc.format.mimetype.spa.fl_str_mv |
application/pdf |
| dc.publisher.spa.fl_str_mv |
Springer |
| dc.publisher.place.spa.fl_str_mv |
Les Ulis, Francia |
| institution |
Universidad de Antioquia |
| bitstream.url.fl_str_mv |
https://bibliotecadigital.udea.edu.co/bitstreams/f4eaa70c-2883-4d71-b745-23fb0fa99319/download https://bibliotecadigital.udea.edu.co/bitstreams/16b51c2c-72d1-4903-9b0e-2d0341ea2c4d/download https://bibliotecadigital.udea.edu.co/bitstreams/2cc27224-b501-48be-8a40-1aac9d999297/download https://bibliotecadigital.udea.edu.co/bitstreams/e6bca794-7048-47fd-86c6-777a26070e45/download https://bibliotecadigital.udea.edu.co/bitstreams/98f3a610-5ff1-4db4-ba7c-9bb43ab2f5ee/download |
| bitstream.checksum.fl_str_mv |
c93539214888683b8c69d0c699e97c56 1646d1f6b96dbbbc38035efc9239ac9c 8a4605be74aa9ea9d79846c1fba20a33 a59f276f72e5f4941a16b8ee9fb45412 c32260ba2bc1ce02ff7ffff20d7a7aaa |
| bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
| repository.name.fl_str_mv |
Repositorio Institucional de la Universidad de Antioquia |
| repository.mail.fl_str_mv |
aplicacionbibliotecadigitalbiblioteca@udea.edu.co |
| _version_ |
1851052341028978688 |
| spelling |
Gallego Cadavid, AlexanderRomano, Antonio EneaGariazzo, StefanoCOSMOGRAVGrupo de Fenomenología de Interacciones Fundamentales2025-01-22T20:26:16Z2025-01-22T20:26:16Z2016Gallego-Cadavid, A., Romano, A.E. & Gariazzo, S. Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbations. Eur. Phys. J. C 76, 385 (2016). https://doi.org/10.1140/epjc/s10052-016-4232-41434-6044https://hdl.handle.net/10495/4432410.1140/epjc/s10052-016-4232-41434-6052ABSTRACT: We study the effects of a class of features of the potential of slow-roll inflationary models corresponding to a step symmetrically dumped by an even power negative exponential factor, which we call local features. Local-type features differ from other branch-type features considered previously, because the potential is only affected in a limited range of the scalar field value, and they are symmetric with respect to the location of the feature. This type of feature only affects the spectrum and bispectrum in a narrow range of scales which leave the horizon during the time interval corresponding to the modification of the potential. On the contrary branch-type features have effects on all the perturbation modes leaving the horizon when the field value is within the interval defining the branch, introducing for example differences in the power spectrum between large and small scale which are absent in the case of local-type features. The spectrum and bispectrum of primordial curvature perturbations are affected by oscillations around the scale k0 exiting the horizon at the time τ0 corresponding to the feature. We also compute the effects of the features on the CMB temperature and polarization spectra, showing the effects of different choices of parameters.Unión Europea. Fondo Social Europeo-FSEFondos Nacionales GriegosUniversidad de Antioquia. Vicerrectoría de investigación. Comité para el Desarrollo de la Investigación - CODICOL0147829COL000842314 páginasapplication/pdfengSpringerLes Ulis, Franciahttps://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by/2.5/co/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Effects of local features of the inflaton potential on the spectrum and bispectrum of primordial perturbationsArtículo de investigaciónhttp://purl.org/coar/resource_type/c_2df8fbb1https://purl.org/redcol/resource_type/ARThttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionCosmologíaCosmologyRadiación de fondoRadiation backgroundOndas electromagnéticasElectromagnetic wavesAnálisis espectralSpectrum analysisRadiación de Fondo Cósmico de Microondas (CMB)Potencial de inflaciónEur. Phys. J. C.14385176European Physical Journal CARISTEIA IIDedicación exclusiva y SostenibilidadIN10219CE2015- 4044RoR:03bp5hc83PublicationORIGINALGallegoAlexander_2016_Effects_Local_Features.pdfGallegoAlexander_2016_Effects_Local_Features.pdfArtículo de investigaciónapplication/pdf1283758https://bibliotecadigital.udea.edu.co/bitstreams/f4eaa70c-2883-4d71-b745-23fb0fa99319/downloadc93539214888683b8c69d0c699e97c56MD51trueAnonymousREADCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8927https://bibliotecadigital.udea.edu.co/bitstreams/16b51c2c-72d1-4903-9b0e-2d0341ea2c4d/download1646d1f6b96dbbbc38035efc9239ac9cMD52falseAnonymousREADLICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://bibliotecadigital.udea.edu.co/bitstreams/2cc27224-b501-48be-8a40-1aac9d999297/download8a4605be74aa9ea9d79846c1fba20a33MD53falseAnonymousREADTEXTGallegoAlexander_2016_Effects_Local_Features.pdf.txtGallegoAlexander_2016_Effects_Local_Features.pdf.txtExtracted texttext/plain41100https://bibliotecadigital.udea.edu.co/bitstreams/e6bca794-7048-47fd-86c6-777a26070e45/downloada59f276f72e5f4941a16b8ee9fb45412MD54falseAnonymousREADTHUMBNAILGallegoAlexander_2016_Effects_Local_Features.pdf.jpgGallegoAlexander_2016_Effects_Local_Features.pdf.jpgGenerated Thumbnailimage/jpeg14725https://bibliotecadigital.udea.edu.co/bitstreams/98f3a610-5ff1-4db4-ba7c-9bb43ab2f5ee/downloadc32260ba2bc1ce02ff7ffff20d7a7aaaMD55falseAnonymousREAD10495/44324oai:bibliotecadigital.udea.edu.co:10495/443242025-03-26 20:51:11.549https://creativecommons.org/licenses/by/4.0/open.accesshttps://bibliotecadigital.udea.edu.coRepositorio Institucional de la Universidad de Antioquiaaplicacionbibliotecadigitalbiblioteca@udea.edu.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 |