Browsing ODA Open Digital Archive by Journals "Universe"
Now showing items 1-4 of 4
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Consequences of the improved limits on the tnsor-to-scalar ratio from BICEP/Planck, and of future CMB-S4 measurements, for inflationary models
(Peer reviewed; Journal article, 2022)More than 30 inflationary models are confronted with the recently improved limit on the tensor-to-scalar ratio presented by the Planck team. I show that a few more models are falsified due to this sharper restriction. ... -
Exact Solutions of the Field Equations for Empty Space in the Nash Gravitational Theory
(Universe;Volume 3, Issue 1, Journal article; Peer reviewed, 2017-02-14)John Nash has proposed a new theory of gravity. We define a Nash-tensor equal to the curvaturetensorappearingintheNashfieldequationsforemptyspace,andcalculateitscomponents for two cases: 1. A static, spherically symmetric ... -
Inertial Frame Dragging and Relative Rotation of ZAMOs in Axistationary Asymptotically Flat Spacetimes
(Universe;, Peer reviewed; Journal article, 2023)In axistationary, asymptotically flat spacetimes, zero angular momentum observers (ZAMOs) define an absolute standard of non-rotation locally, as can be verified by the absence of any Sagnac effect for these observers. ... -
Predictions of Spectral Parameters by Several Inflationary Universe Models in light of the Planck Results
(Universe;Volume 4, Issue 2, Journal article; Peer reviewed, 2018-01-29)I give a review of predictions of values of spectral parameters for a large number of inflationary models. The present review includes detailed deductions and information about the approximations that have been made, written ...