Acceleration at z>1?

• Verfasst von: Amendola, Luca [VerfasserIn]
• Titel: Acceleration at z>1?
• Verf.angabe: Luca Amendola, INAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monte Porzio Catone, Roma, Italy
• Fussnoten: Gesehen am 17.11.2017
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2002
• Band/Heft Quelle: (2002) Artikel-Nummer 0209494, 13 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565449819

Abstract

Most models of dark energy predict the beginning of the accelerated epoch at z <= 1. However, there are no observational or theoretical evidences in favor of such a recent start of the cosmic acceleration. In fact, a model of dark energy coupled to dark matter is explicitely constructed that a) is accelerated even at high z; b) allows structure formation during acceleration; and c) is consistent with the type Ia supernovae Hubble diagram, including the farthest known supernova SN1997ff at z~1.7 . It is shown that the accelerated epoch in this model could have started as early as z~5.