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Red Density Perturbations and Inflationary Gravitational Waves

We study the implications of recent indications for a red spectrum of primordial density perturbations for the detection of inflationary gravitational waves (IGWs) with forthcoming cosmic microwave background experiments. We find that if inflation occurs with a single field with an inflaton potentia...

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Detalles Bibliográficos
Autores principales: Pagano, Luca, Cooray, Asantha, Melchiorri, Alessandro, Kamionkowski, Marc
Lenguaje:eng
Publicado: 2007
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2008/04/009
http://cds.cern.ch/record/1047601
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author Pagano, Luca
Cooray, Asantha
Melchiorri, Alessandro
Kamionkowski, Marc
author_facet Pagano, Luca
Cooray, Asantha
Melchiorri, Alessandro
Kamionkowski, Marc
author_sort Pagano, Luca
collection CERN
description We study the implications of recent indications for a red spectrum of primordial density perturbations for the detection of inflationary gravitational waves (IGWs) with forthcoming cosmic microwave background experiments. We find that if inflation occurs with a single field with an inflaton potential minimized at V=0, then Planck will be able to detect IGWs at better than 2$\sigma$ confidence level, unless the inflaton potential is a power law with a very weak power. The proposed satellite missions of the Cosmic Vision and Inflation Probe programs will be able to detect IGWs from all the models we have surveyed at better than 5$\sigma$ confidence level. We provide an example of what is required if the IGW background is to remain undetected even by these latter experiments.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
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spelling cern-10476012023-03-14T19:50:06Zdoi:10.1088/1475-7516/2008/04/009http://cds.cern.ch/record/1047601engPagano, LucaCooray, AsanthaMelchiorri, AlessandroKamionkowski, MarcRed Density Perturbations and Inflationary Gravitational WavesAstrophysics and AstronomyWe study the implications of recent indications for a red spectrum of primordial density perturbations for the detection of inflationary gravitational waves (IGWs) with forthcoming cosmic microwave background experiments. We find that if inflation occurs with a single field with an inflaton potential minimized at V=0, then Planck will be able to detect IGWs at better than 2$\sigma$ confidence level, unless the inflaton potential is a power law with a very weak power. The proposed satellite missions of the Cosmic Vision and Inflation Probe programs will be able to detect IGWs from all the models we have surveyed at better than 5$\sigma$ confidence level. We provide an example of what is required if the IGW background is to remain undetected even by these latter experiments.We study the implications of recent indications for a red spectrum of primordial density perturbations for the detection of inflationary gravitational waves (IGWs) with forthcoming cosmic microwave background experiments. We find that if inflation occurs with a single field with an inflaton potential minimized at V=0, then Planck will be able to detect IGWs at better than 2$\sigma$ confidence level, unless the inflaton potential is a power law with a very weak power. The proposed satellite missions of the Cosmic Vision and Inflation Probe programs will be able to detect IGWs from all the models we have surveyed at better than 5$\sigma$ confidence level. We provide an example of what is required if the IGW background is to remain undetected even by these latter experiments.arXiv:0707.2560CERN-PH-TH-2007-251oai:cds.cern.ch:10476012007-07-18
spellingShingle Astrophysics and Astronomy
Pagano, Luca
Cooray, Asantha
Melchiorri, Alessandro
Kamionkowski, Marc
Red Density Perturbations and Inflationary Gravitational Waves
title Red Density Perturbations and Inflationary Gravitational Waves
title_full Red Density Perturbations and Inflationary Gravitational Waves
title_fullStr Red Density Perturbations and Inflationary Gravitational Waves
title_full_unstemmed Red Density Perturbations and Inflationary Gravitational Waves
title_short Red Density Perturbations and Inflationary Gravitational Waves
title_sort red density perturbations and inflationary gravitational waves
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2008/04/009
http://cds.cern.ch/record/1047601
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AT coorayasantha reddensityperturbationsandinflationarygravitationalwaves
AT melchiorrialessandro reddensityperturbationsandinflationarygravitationalwaves
AT kamionkowskimarc reddensityperturbationsandinflationarygravitationalwaves