Dark energy: Observational status and theoretical models

Shinji Tsujikawa*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


About 70 % of the energy density of the Universe today consists of dark energy responsible for cosmic acceleration. We present observational bounds on dark energy constrained by the type Ia supernovæ, cosmic microwave background, and baryon acoustic oscillations. We also review theoretical attempts to explain the origin of dark energy. This includes the cosmological constant, modified matter models (such as quintessence, k-essence, coupled dark energy, unified models of dark energy and dark matter), and modified gravity models (such as f(R) gravity, scalar-tensor theories, braneworlds).

Original languageEnglish
Title of host publicationQuantum Gravity and Quantum Cosmology
EditorsGianluca Calcagni, Lefteris Papantonopoulos, George Siopsis, Nikos Tsamis
Number of pages43
Publication statusPublished - 2013
Externally publishedYes

Publication series

NameLecture Notes in Physics
ISSN (Print)0075-8450

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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