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Universe, Volume 7, Issue 10

2021 October - 39 articles

Cover Story: In this work, we have analyzed, in detail, dark matter (DM) in a model (the aνMSM) that features sterile neutrinos and a QCD axion sector. This is well-motivated because it can account for all experimentally confirmed evidence of BSM physics (neutrino masses, dark matter, and baryon asymmetry), and it solves the strong CP problem, features a stable electroweak vacuum, and realizes a viable version of Higgs inflation. To date, DM was explained exclusively through the axion; however, as shown in this work, the lightest sterile neutrino can also contribute to DM, and one can have a multi-component (axion–sterile–neutrino). This scenario relates the axion parameters with the sterile neutrino parameters and allows enlarging the region of parameter space with absolute electroweak vacuum stability. View this paper
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Articles (39)

  • Article
  • Open Access
33 Citations
2,454 Views
18 Pages

Analysis of Birefringence and Dispersion Effects from Spacetime-Symmetry Breaking in Gravitational Waves

  • Kellie O’Neal-Ault,
  • Quentin G. Bailey,
  • Tyann Dumerchat,
  • Leïla Haegel and
  • Jay Tasson

14 October 2021

In this work, we review the effective field theory framework to search for Lorentz and CPT symmetry breaking during the propagation of gravitational waves. The article is written so as to bridge the gap between the theory of spacetime-symmetry breaki...

  • Communication
  • Open Access
10 Citations
2,024 Views
9 Pages

14 October 2021

Magnetars have already been a potential candidate as gravitational wave sources that could be detected by current and future terrestrial as well as ground-based gravitational wave detectors. In this article, we focus on the gravitational wave emissio...

  • Article
  • Open Access
2 Citations
2,786 Views
20 Pages

Lomonosov GRB Catalogue: The First Experience of Prompt Emission Multi-Wavelength Observations

  • V. A. Sadovnichy,
  • M. I. Panasyuk,
  • S. I. Svertilov,
  • V. M. Lipunov,
  • V. V. Bogomolov,
  • A. V. Bogomolov,
  • E. S. Gorbovskoy,
  • A. F. Iyudin,
  • V. V. Kalegaev and
  • I. V. Yashin
  • + 4 authors

9 October 2021

This paper presents a catalogue of gamma-ray bursts (GRBs) that were detected by the instruments onboard the Lomonosov space observatory. The Lomonosov mission gave the first experience of not only multi-wavelength (from optical to gamma) observation...

  • Article
  • Open Access
3 Citations
2,093 Views
18 Pages

9 October 2021

With the vast breakthrough brought by the Event Horizon Telescope, the theoretical analysis of various black holes has become more critical than ever. In this paper, the second-order asymptotic analytical solution of the charged dilaton black hole fl...

  • Review
  • Open Access
27 Citations
3,697 Views
14 Pages

Evolution of Data Formats in Very-High-Energy Gamma-Ray Astronomy

  • Cosimo Nigro,
  • Tarek Hassan and
  • Laura Olivera-Nieto

8 October 2021

Most major scientific results produced by ground-based gamma-ray telescopes in the last 30 years have been obtained by expert members of the collaborations operating these instruments. This is due to the proprietary data and software policies adopted...

  • Article
  • Open Access
43 Citations
3,046 Views
22 Pages

The Nuclear Matter Density Functional under the Nucleonic Hypothesis

  • Hoa Dinh Thi,
  • Chiranjib Mondal and
  • Francesca Gulminelli

6 October 2021

A Bayesian analysis of the possible behaviors of the dense matter equation of state informed by recent LIGO-Virgo as well as NICER measurements reveals that all the present observations are compatible with a fully nucleonic hypothesis for the composi...

  • Article
  • Open Access
26 Citations
4,443 Views
111 Pages

A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei—Preliminary Results

  • Luigi Foschini,
  • Matthew L. Lister,
  • Sonia Antón,
  • Marco Berton,
  • Stefano Ciroi,
  • Maria J. M. Marchã,
  • Merja Tornikoski,
  • Emilia Järvelä,
  • Patrizia Romano and
  • Elena Dalla Bontà
  • + 1 author

5 October 2021

We are compiling a new list of gamma-ray jetted active galactic nuclei (AGN), starting from the fourth catalog of point sources of the Fermi Large Area Telescope (LAT). Our aim is to prepare a list of jetted AGN with known redshifts and classificatio...

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Universe - ISSN 2218-1997