English
Related papers

Related papers: The influence of magnetic field geometry on magnet…

200 papers

There has recently been growing evidence for the existence of neutron stars possessing magnetic fields with strengths that exceed the quantum critical field strength of $4.4 \times 10^{13}$ G, at which the cyclotron energy equals the…

Astrophysics · Physics 2009-11-11 Alice K. Harding , Dong Lai

A detailed characterization of the particle induced background is fundamental for many of the scientific objectives of the Athena X-ray telescope, thus an adequate knowledge of the background that will be encountered by Athena is desirable.…

Magnetic field may distort neutron stars (NSs), but its effect has not been robustly tested through gravitational-wave observation yet due to the absence of a fast rotating Galactic magnetar. Part of gamma-ray bursts (GRBs) are potential to…

High Energy Astrophysical Phenomena · Physics 2022-10-19 Tingting Lin , Shuang Du , Weihua Wang , Shujin Hou , Renxin Xu

Estimations of magnetic fields of neutron stars, observed as radio and X-ray pulsars, are discussed. It is shown, that theoretical and observational values for different types of radiopulsars are in good correspondence. Radiopulsars in…

High Energy Astrophysical Phenomena · Physics 2016-01-18 G. S. Bisnovatyi-Kogan

Isolated neutron stars show a diversity in timing and spectral properties, which has historically led to a classification in different sub-classes. The magnetic field plays a key role in many aspects of the neutron star phenomenology: it…

High Energy Astrophysical Phenomena · Physics 2015-01-28 Daniele Viganò , Jose A. Pons , Juan A. Miralles , Nanda Rea

Magnetic field geometry is expected to play a fundamental role in magnetar activity. The discovery of a phase-variable absorption feature in the X-ray spectrum of SGR 0418+5729, interpreted as cyclotron resonant scattering, suggests the…

High Energy Astrophysical Phenomena · Physics 2019-06-12 D. Pizzocaro , A. Tiengo , S. Mereghetti , R. Turolla , P. Esposito , L. Stella , S. Zane , N. Rea , F. Coti Zelati , G. Israel

The excellent sensitivity of X-ray telescopes, such as Chandra and XMM-Newton, is ideal for the study of cooling neutron stars, which can emit at these energies. In order to exploit the wealth of information contained in the high quality…

High Energy Astrophysical Phenomena · Physics 2014-08-08 Wynn C. G. Ho

Magnetic fields play an important role in shaping the structure and evolution of the interstellar medium (ISM) of galaxies, but the details of this relationship remain unclear. With SKA1, the 3D structure of galactic magnetic fields and its…

In this paper we present a three-dimensional numerical model for the radio emission of Magnetic Chemically Peculiar stars, on the hypothesis that energetic electrons emit by the gyrosynchrotron mechanism. For this class of radio stars,…

Astrophysics · Physics 2009-11-10 C. Trigilio , P. Leto , G. Umana , F. Leone , C. S. Buemi

Pre-decoupling magnetic fields affect the scalar modes of the geometry and produce observable effects which can be constrained also through the use of current (as opposed to forthcoming) data stemming from the Cosmic Microwave Background…

Cosmology and Nongalactic Astrophysics · Physics 2010-04-29 Massimo Giovannini

Recent multiwavelength observations of PKS 0208-512 by SMARTS, Fermi, and Swift revealed that gamma-ray and optical light curves of this flat spectrum radio quasars are highly correlated, but with an exception of one large optical flare…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Xuhui Chen , Ritaban Chatterjee , Giovanni Fossati , Martin Pohl

The surface structure of the magnetic field in stars is one part of the information about the surface inhomogeneities like brightness, movement or chemical composition, which is contained in the integral radiation flux but distorted beyond…

Astrophysics · Physics 2007-05-23 E. Gerth , Yu. V. Glagolevskij

We perform Monte Carlo simulations of cosmic ray-induced hard X-ray radiation from the Earth's atmosphere. We find that the shape of the spectrum emergent from the atmosphere in the energy range 25-300 keV is mainly determined by Compton…

Astrophysics · Physics 2008-11-26 S. Sazonov , E. Churazov , R. Sunyaev , M. Revnivtsev

The recent association of soft gamma repeaters (SGRs) with counterparts in other wavebands has sparked much interest in these sources. One of the recent models for these objects is that they originate in the environs of neutron stars with…

Astrophysics · Physics 2009-10-28 M. G. Baring , A. K. Harding

The emission spectra of individual self-assembled quantum dots containing a single magnetic Mn atom differ strongly from dot to dot. The differences are explained by the influence of the system geometry, specifically the in-plane asymmetry…

Other Condensed Matter · Physics 2009-11-11 Y. Leger , L. Besombes , L. Maingault , D. Ferrand , H. Mariette

Covariant density functional theory is used to study the effect of strong magnetic fields, up to the limit predicted for neutron stars (for magnetars $B \approx10^{18}$G), on nuclear structure. All new terms in the equation of motion…

Nuclear Theory · Physics 2015-05-28 Daniel Pena Arteaga , Marcella Grasso , Elias Khan , Peter Ring

Axion dark matter passing through the magnetospheres of magnetars can undergo hyper-efficient resonant mixing with low-energy photons, leading to the production of narrow spectral lines that could be detectable on Earth. Since this is a…

High Energy Physics - Phenomenology · Physics 2025-05-28 Sandip Roy , Anirudh Prabhu , Christopher Thompson , Samuel J. Witte , Carlos Blanco , Jonathan Zhang

Thermal surface emissions have now been detected from more than a dozen isolated neutron stars, including radio pulsars, radio-quiet neutron stars and magnetars. These detections can potentially provide important information on the interior…

Astrophysics · Physics 2007-05-23 Dong Lai , W. C. G. Ho

In this work, we study the effects of different magnetic field configurations in neutron stars described by a many-body forces formalism (MBF model). The MBF model is a relativistic mean field formalism that takes into account many-body…

Nuclear Theory · Physics 2017-09-06 R. O. Gomes , B. Franzon , V. Dexheimer , S. Schramm , C. A. Z. Vasconcellos

Ultramagnetized neutron stars or magnetars have been invoked to explain several astrophysical phenomena. We examine how the magnetic field of a magnetar will decay over time and how this decay affects the cooling of the object. We find that…

Astrophysics · Physics 2009-10-30 Jeremy S. Heyl , S. R. Kulkarni