2.5
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21 days
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Acceptance to Publication

Universe, Volume 5, Issue 11

2019 November - 5 articles

Cover Story: Gravitational wave astronomy allows us to study objects and events invisible in electromagnetic waves. It is crucial to validate the theories and models of the most mysterious and extreme matter in the Universe: neutron stars. In addition to inspirals and mergers of neutron stars, there are currently a few proposed mechanisms that can trigger long-lasting gravitational radiation from neutron stars, such as elastically and/or magnetically driven deformations: mountains on the stellar surface supported by the elastic strain or magnetic field, free precession, or unstable oscillation modes (e.g., the r-modes). View this paper.

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43 Citations

4,261 Views

23 Pages

Observational Constraints on Dynamical Dark Energy with Pivoting Redshift

Weiqiang Yang,
Supriya Pan,
Eleonora Di Valentino and
Emmanuel N. Saridakis

Universe2019, 5(11), 219;https://doi.org/10.3390/universe5110219

16 November 2019

We investigate the generalized Chevallier–Polarski–Linder (CPL) parametrization, which contains the pivoting redshift $z_{p}$ as an extra free parameter, in order to examine whether the evolution of the dark energy equation of state c...

(This article belongs to the Special Issue Probing the Dark Universe with Theory and Observations)

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Review

63 Citations

5,728 Views

44 Pages

The Effects of Finite Distance on the Gravitational Deflection Angle of Light

Toshiaki Ono and
Hideki Asada

Universe2019, 5(11), 218;https://doi.org/10.3390/universe5110218

1 November 2019

In order to clarify the effects of the finite distance from a lens object to a light source and a receiver, the gravitational deflection of light has been recently reexamined by using the Gauss–Bonnet (GB) theorem in differential geometry (Ishi...

(This article belongs to the Special Issue Gravitational Lensing and Optical Geometry: A Centennial Perspective)

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Article

2 Citations

4,401 Views

28 Pages

Gravitational Fluctuations as an Alternative to Inflation II. CMB Angular Power Spectrum

Herbert W. Hamber and
Lu Heng Sunny Yu

Universe2019, 5(11), 216;https://doi.org/10.3390/universe5110216

31 October 2019

Power spectra always play an important role in the theory of inflation. In particular, the ability to reproduce the galaxy matter power spectrum $P (k)$ and the CMB temperature angular power spectrum $C_{l}$ ’s to high accuracy is of...

Full Article

Review

107 Citations

10,194 Views

36 Pages

Continuous Gravitational Waves from Neutron Stars: Current Status and Prospects

Magdalena Sieniawska and
Michał Bejger

Universe2019, 5(11), 217;https://doi.org/10.3390/universe5110217

31 October 2019

Gravitational waves astronomy allows us to study objects and events invisible in electromagnetic waves. It is crucial to validate the theories and models of the most mysterious and extreme matter in the Universe: the neutron stars. In addition to ins...

(This article belongs to the Special Issue Neutron Star Astrophysics)

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Article

27 Citations

3,730 Views

11 Pages

On the Constant-Roll Inflation with Large and Small η_H

Qing Gao,
Yungui Gong and
Zhu Yi

Universe2019, 5(11), 215;https://doi.org/10.3390/universe5110215

25 October 2019

We study the apparent duality between large and small $η_{H}$ for the constant-roll inflation with the second slow-roll parameter $η_{H}$ being a constant. In the previous studies, only the constant-roll inflationary models with small...