Do supernovae favor tachyonic big brake instead of de sitter?

L. Á Gergely, Z. Keresztes, A. Yu Kamenshchik, V. Gorini, U. Moschella

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We investigate whether a tachyonic scalar field, encompassing both dark energy and dark matter-like features will drive our universe towards a Big Brake singularity or a de Sitter expansion. In doing this it is crucial to establish the parameter domain of the model, which is compatible with type Ia supernovae data. We find the 1σ contours and evolve the tachyonic sytem into the future. We conclude, that both future evolutions are allowed by observations, Big Brake becoming increasingly likely with the increase of the positive model parameter k.

Original languageEnglish
Title of host publicationInvisible Universe International Conference
Pages884-891
Number of pages8
DOIs
Publication statusPublished - Aug 23 2010
EventInvisible Universe International Conference - Paris, France
Duration: Jun 29 2009Jul 3 2009

Publication series

NameAIP Conference Proceedings
Volume1241
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInvisible Universe International Conference
CountryFrance
CityParis
Period6/29/097/3/09

Keywords

  • cosmological singularities
  • dark energy
  • supernovae
  • tachyons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Gergely, L. Á., Keresztes, Z., Kamenshchik, A. Y., Gorini, V., & Moschella, U. (2010). Do supernovae favor tachyonic big brake instead of de sitter? In Invisible Universe International Conference (pp. 884-891). (AIP Conference Proceedings; Vol. 1241). https://doi.org/10.1063/1.3462729