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Among the many different classes of stellar objects, neutron stars provide a unique environment where we can test (at the same time) our understanding of matter with extreme density, temperature, and magnetic field. In particular, the…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Nanda Rea

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

In this paper we present a new result, namely that the primal magnetic field of the collapsed core during a supernova explosion will, as a result of the conservation of magnetic flux, receive a massive boost to more than 90 times its…

Astrophysics · Physics 2008-11-26 Qiu-he Peng , Hao Tong

Well before the radio discovery of pulsars offered the first observational confirmation for their existence (Hewish et al., 1968), it had been suggested that neutron stars might be endowed with very strong magnetic fields of…

High Energy Astrophysical Phenomena · Physics 2019-02-18 Konstantinos N. Gourgouliatos , Paolo Esposito

Neutron stars contain persistent, ordered magnetic fields that are the strongest known in the Universe. However, their magnetic fluxes are similar to those in magnetic A and B stars and white dwarfs, suggesting that flux conservation during…

Astrophysics · Physics 2009-11-13 Andreas Reisenegger

Neutron stars are natural physical laboratories allowing us to study a plethora of phenomena in extreme conditions. In particular, these compact objects can have very strong magnetic fields with non-trivial origin and evolution. In many…

High Energy Astrophysical Phenomena · Physics 2021-09-14 Andrei P. Igoshev , Sergei B. Popov , Rainer Hollerbach

The presence of strong magnetic fields in neutron stars, such as in magnetars, may significantly affect their crust-core transition properties and the crust size. This knowledge is crucial in the correct interpretation of astrophysical…

Nuclear Theory · Physics 2019-04-03 Debarati Chatterjee , Francesca Gulminelli , Debora P. Menezes

Neutron stars feature extremely high magnetic fields with deduced field strengths of $10^{15}$ G in the case of magnetars and potentially much higher values inside of the star. In this context we consider the appearance of $\rho^-$ meson…

Solar and Stellar Astrophysics · Physics 2015-04-03 S. Schramm , A. Bhattacharyya , V. Dexheimer , R. Mallick

Since there is 3P2 neutron superfluid in neutron star interior, it can be treated as a system of magnetic dipoles. Under the presence of background magnetic field, the magnetic dipoles tend to align in the same direction. When the…

High Energy Astrophysical Phenomena · Physics 2016-12-15 Qiu-he Peng , Jie Zhang , Men-quan Liu , Chich-gang Chou

We propose that a magnetar could be formed during the core collapse of massive stars or coalescence of two normal neutron stars, through collecting and inheriting the magnetic fields magnified by hyperaccreting disk. After the magnetar is…

High Energy Astrophysical Phenomena · Physics 2015-06-11 Yi Xie , Shuang-Nan Zhang

We review the results in our recent works on the generation of strong magnetic fields in compact stars driven by the parity violating electroweak interactions between background fermions. The cases of a neutron star, a hybrid star, and a…

High Energy Astrophysical Phenomena · Physics 2017-12-21 Maxim Dvornikov

Strongly magnetized neutron stars are popular candidates for producing detectable electromagnetic and gravitational-wave signals. Gravitational collapses of neutron stars triggered by a phase transition from hadrons to deconfined quarks in…

High Energy Astrophysical Phenomena · Physics 2024-10-25 Anson Ka Long Yip , Patrick Chi-Kit Cheong , Tjonnie Guang Feng Li

The properties of the extremely strong magnetic fields of neutron stars affect in a unique way their evolution and the associated phenomenology. Due to the lack of constraints from direct observations, our understanding of the magnetic…

High Energy Astrophysical Phenomena · Physics 2015-06-22 Riccardo Ciolfi

A phase transition from paramagnetism to ferromagnetism in neutron star interior is explored. Since there is $^3$P$_2$ neutron superfluid in neutron star interior, it can be treated as a system of magnetic dipoles. Under the presence of…

High Energy Astrophysical Phenomena · Physics 2009-11-12 Qiu He Peng , Hao Tong

This paper suggests the idea that all neutron stars experienced at birth an ultrafast decay of their magnetic fields from their initial values to their current surface values. If the electromagnetic energy radiated during this field decay…

Astrophysics of Galaxies · Physics 2012-04-05 Ricardo Heras

The presence of a strong magnetic field is a feature common to a significant fraction of degenerate stars, yet little is understood about field origin and evolution. New observational constraints from volume-limited surveys point to a more…

Solar and Stellar Astrophysics · Physics 2022-08-24 Stefano Bagnulo , John D. Landstreet

Recently, neutron stars with very strong surface magnetic fields have been suggested as the site for the origin of observed soft gamma repeaters (SGRs). We investigate the influence of a strong magnetic field on the properties and internal…

Astrophysics · Physics 2009-10-31 In-Saeng Suh , G. J. Mathews

Magnetars form a special population of neutron stars with strong magnetic fields and long spin periods. About 30 magnetars and magnetar candidates known currently are probably isolated. But the possibility that magnetars are in binaries…

High Energy Astrophysical Phenomena · Physics 2022-02-02 Kun Xu , Xiang-Dong Li , Zhe Cui , Qiao-Chu Li , Yong Shao , Xilong Liang , Jifeng Liu

Neutron stars enable us to study both the highest densities and the highest magnetic fields in the known Universe. In this article I review what can be learned about such fundamental physics using magnetar bursts. Both the instability…

High Energy Astrophysical Phenomena · Physics 2012-06-26 Anna L. Watts

Massive stars are crucial building blocks of galaxies and the universe, as production sites of heavy elements and as stirring agents and energy providers through stellar winds and supernovae. The field of magnetic massive stars has seen…

Solar and Stellar Astrophysics · Physics 2015-05-27 Rolf Walder , Doris Folini , Georges Meynet