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
• Umfang: 6 S.
• Fussnoten: Gesehen am 17.11.2017
• Titel Quelle: Enthalten in: Royal Astronomical Society: Monthly notices of the Royal Astronomical Society
• Jahr Quelle: 2003
• Band/Heft Quelle: 342(2003), 1, S. 221-226
• ISSN Quelle: 1365-2966
• DOI: doi:10.1046/j.1365-8711.2003.06540.x
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565449657

Abstract

Most models of dark energy predict the beginning of the accelerated epoch at z≤ 1. However, there is no observational or theoretical evidence in favour of such a recent start of the cosmic acceleration. In fact, a model of dark energy coupled to dark matter is explicitly constructed which (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.