Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Initial directional singularity in inflationary models
Year:2016
Research Areas
  • Physics astrophysics - Cosmology
Information
Abstract
In Haro, Amorós, and Pan [Phys. Rev. D 93, 084018 (2016)] a new cosmological model is proposed with no big bang singularity in the past, though past geodesically incomplete. This model starts with an inflationary era, follows with a stiff matter dominated period and evolves to accelerated expansion in an asymptotically de Sitter regime in a realistic fashion. The big bang singularity is replaced by a directional singularity. This singularity cannot be reached by comoving observers, since it would take them an infinite proper time lapse to go back to it. On the contrary, observers with nonzero linear momentum have the singularity at finite proper time in their past, though arbitrarily large. Hence, the time lapse from the initial singularity can be as long as desired, even infinity, depending on the linear momentum of the observer. This conclusion applies to similar inflationary models. Due to the interest of these models, we address here the properties of such singularities.
International
Si
JCR
Si
Title
Physical Review D
ISBN
1550-7998
Impact factor JCR
4,864
Impact info
Volume
94
10.1103/PhysRevD.94.024049
Journal number
2
From page
024049-1
To page
024049-5
Month
SIN MES
Ranking
Participants
  • Autor: Leonardo Fernandez Jambrina (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Matemática e Informática Aplicadas a la Ingenierías Civil y Naval
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)