Dark energy: Observational status and theoretical models

Shinji Tsujikawa*

*Corresponding author for this work

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


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, George Siopsis, Lefteris Papantonopoulos, Nikos Tsamis
PublisherSpringer New York LLC
Number of pages43
ISBN (Print)9783642330353
Publication statusPublished - 2013
Externally publishedYes
Event6th Aegean School on Quantum Gravity and Quantum Cosmology, 2011 - Chora on Naxos Island, Greece
Duration: 2011 Sept 122011 Sept 17

Publication series

NameSpringer Proceedings in Mathematics and Statistics
ISSN (Print)2194-1009
ISSN (Electronic)2194-1017


Conference6th Aegean School on Quantum Gravity and Quantum Cosmology, 2011
CityChora on Naxos Island

ASJC Scopus subject areas

  • Mathematics(all)


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