Advances in Magnetars

A special issue of Universe (ISSN 2218-1997). This special issue belongs to the section "Compact Objects".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 4645

Special Issue Editor

Perimeter Institute for Theoretical Physics, Waterloo, ON N2L 2Y5, Canada
Interests: high energy astrophysics; cosmology; plasma astrophysics

Special Issue Information

Dear Colleagues,

Due to their ultrastrong magnetic fields, magnetars are probably the most mysterious objects in the universe. Recently, the study of magnetars has received increasing amounts of attention, particularly in many proposed theoretical models, including gamma ray bursts, superluminous supernovae, fast radio bursts, as well as binary neutron star mergers.

In the meantime, the observation of magnetars has entered a new stage, as X-ray polarization telescopes, including IXPE and eXTP, are about to be launched. However, the profound physical implications of the strong magnetic fields remain to be explored. The mechanism for soft gamma ray bursts and outbursts, the mechanical and thermal properties of the crust, and plasma physics and radiative processes in the magnetosphere are essential to understand persistent and transient radiations of magnetars. In this Special Issue, we collect recent advances from observations and theories in the study of magnetars.

Topics include (but are not limited to):

  • X-ray observations of magnetars;
  • Fast radio bursts;
  • Polarization signatures of magnetars;
  • Magnetar crust;
  • Plasma and radiations in the magnetosphere.

Dr. Xinyu Li
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Universe is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetars
  • magnetic fields
  • neutron stars
  • X-ray observation
  • transient events

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

11 pages, 490 KiB  
Article
The Elasticity of the Neutron Star Mantle: The Improved Compressible Liquid Drop Model for Cylindrical Phases
by Nikita A. Zemlyakov and Andrey I. Chugunov
Universe 2023, 9(5), 220; https://doi.org/10.3390/universe9050220 - 4 May 2023
Cited by 3 | Viewed by 1458
Abstract
Neutron stars are the densest objects in the Universe. They have a microscopically homogeneous core and heterogeneous crust. In particular, there may be a specific layer inside neutron stars, the mantle, which consists of substantially non-spherical nuclei immersed in a background of relativistic [...] Read more.
Neutron stars are the densest objects in the Universe. They have a microscopically homogeneous core and heterogeneous crust. In particular, there may be a specific layer inside neutron stars, the mantle, which consists of substantially non-spherical nuclei immersed in a background of relativistic degenerate electrons and quasi-free neutrons. In this paper, we reconsider the transverse shear modulus for cylindrical phases of the mantle within the framework of the compressible liquid drop model. We demonstrate that transverse shearing affects the shape of nuclear clusters: their cross-section becomes elliptical. This effect reduces the respective elastic constant. Using a simple model, we perform all derivations analytically and obtain the expression for the transverse shear modulus, which can be useful for astrophysical applications. Full article
(This article belongs to the Special Issue Advances in Magnetars)
Show Figures

Figure 1

23 pages, 588 KiB  
Article
Onset of Electron Captures and Shallow Heating in Magnetars
by Nicolas Chamel and Anthea Francesca Fantina
Universe 2022, 8(6), 328; https://doi.org/10.3390/universe8060328 - 11 Jun 2022
Cited by 2 | Viewed by 2306
Abstract
The loss of magnetic pressure accompanying the decay of the magnetic field in a magnetar may trigger exothermic electron captures by nuclei in the shallow layers of the stellar crust. Very accurate analytical formulas are obtained for the threshold density and pressure, as [...] Read more.
The loss of magnetic pressure accompanying the decay of the magnetic field in a magnetar may trigger exothermic electron captures by nuclei in the shallow layers of the stellar crust. Very accurate analytical formulas are obtained for the threshold density and pressure, as well as for the maximum amount of heat that can be possibly released, taking into account the Landau–Rabi quantization of electron motion. These formulas are valid for arbitrary magnetic field strengths, from the weakly quantizing regime to the most extreme situation in which electrons are all confined to the lowest level. Numerical results are also presented based on experimental nuclear data supplemented with predictions from the Brussels-Montreal model HFB-24. This same nuclear model has been already employed to calculate the equation of state in all regions of magnetars. Full article
(This article belongs to the Special Issue Advances in Magnetars)
Show Figures

Figure 1

Back to TopTop