Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Amendola, Luca [VerfasserIn]  |
| Polarski, David [VerfasserIn]  |
| Tsujikawa, Shinji [VerfasserIn]  |
Titel: | Power-laws f(R) theories are cosmologically unacceptable |
Verf.angabe: | Luca Amendola, David Polarski, and Shinji Tsujikawa |
Fussnoten: | Gesehen am 15.11.2017 |
Titel Quelle: | Enthalten in: De.arxiv.org |
Jahr Quelle: | 2007 |
Band/Heft Quelle: | (2007) Artikel-Nummer 0605384, 4 Seiten |
Abstract: | In a recent paper [1] (PRL 98,131302,2007) we have shown that f(R)=R + mu R^{n} modified gravity dark energy models are not cosmologically viable because during the matter era that precedes the accelerated stage the cosmic expansion is given by a sim t^{1/2} rather than a sim t^{2/3}, where a is a scale factor and t is the cosmic time. A recent work [2] (PLB 639,135-143,2006) by Capozziello et al. criticised our results presenting some apparent counter-examples to our claim in f(R)= mu R^{n} models. We show here that those particular R^{n} models can produce an expansion as a sim t^{2/3} but this does not connect to a late-time acceleration. Hence, though acceptable f(R) dark energy models may exist, the R^{n} models presented in Capozziello et al. are not cosmologically viable, confirming our previous results in Ref. [1]. |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Kostenfrei: Verlag: http://arxiv.org/abs/astro-ph/0605384 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1565369343 |
Verknüpfungen: | → Sammelwerk |
Power-laws f(R) theories are cosmologically unacceptable / Amendola, Luca [VerfasserIn] (Online-Ressource)
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