Logo del repository
  1. Home
 
Opzioni

Running spectral index from inflation with modulations

Kobayashi T.
•
Takahashi F.
2011
  • journal article

Periodico
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Abstract
We argue that a large negative running spectral index, if confirmed, might suggest that there are abundant structures in the inflaton potential, which result in a fairly large (both positive and negative) running of the spectral index at all scales. It is shown that the center value of the running spectral index suggested by the recent CMB data can be easily explained by an inflaton potential with superimposed periodic oscillations. In contrast to cases with constant running, the perturbation spectrum is enhanced at small scales, due to the repeated modulations. We mention that such features at small scales may be seen by 21 cm observations in the future. © 2011 IOP Publishing Ltd and SISSA.
DOI
10.1088/1475-7516/2011/01/026
WOS
WOS:000286802900026
Archivio
http://hdl.handle.net/20.500.11767/124835
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79551672847
https://arxiv.org/abs/1011.3988
Diritti
metadata only access
Soggetti
  • Cosmological paramete...

  • Inflation

  • Physics of the early ...

  • Power spectrum

  • Settore FIS/02 - Fisi...

google-scholar
Get Involved!
  • Source Code
  • Documentation
  • Slack Channel
Make it your own

DSpace-CRIS can be extensively configured to meet your needs. Decide which information need to be collected and available with fine-grained security. Start updating the theme to match your nstitution's web identity.

Need professional help?

The original creators of DSpace-CRIS at 4Science can take your project to the next level, get in touch!

Realizzato con Software DSpace-CRIS - Estensione mantenuta e ottimizzata da 4Science

  • Impostazioni dei cookie
  • Informativa sulla privacy
  • Accordo con l'utente finale
  • Invia il tuo Feedback