Results 81 to 90 of about 17,260 (230)

The role of magnetar transient activity in time-domain and multimessenger astronomy

Frontiers in Astronomy and Space Sciences
Time-domain and multimessenger astronomy (TDAMM) involves the study of transient and time-variable phenomena across various wavelengths and messengers.
Michela Negro, George Younes, Zorawar Wadiasingh, Zorawar Wadiasingh, Zorawar Wadiasingh, Eric Burns, Aaron Trigg, Matthew Baring   +7 more
doaj   +1 more source

Chiral anomalous processes in magnetospheres of pulsars and black holes

European Physical Journal C: Particles and Fields, 2022
We propose that chirally asymmetric plasma can be produced in the gap regions of the magnetospheres of pulsars and black holes. We show that, in the case of supermassive black holes situated in active galactic nuclei, the chiral charge density and the ...
Eduard V. Gorbar, Igor A. Shovkovy
doaj   +1 more source

Stochastic background of gravitational waves emitted by magnetars

, 2010
Two classes of high energy sources in our galaxy are believed to host magnetars, neutron stars whose emission results from the dissipation of their magnetic field.
Allen, Alpar, Bonazzola, Braithwaite, Braithwaite, Braithwaite, Ciolfi, Ciolfi, Colaiuda, Cutler, Dall’Osso, Davies, Duncan, Ferrari, Ferrari, Ferrari, Ferrario, Ferraro, Jones, Jones, Jones, Kinney, Kinney, Konno, Lander, Luigi Stella, Lyutikov, Marassi, Mereghetti, Omukai, Ostriker, Popov, Raffaella Schneider, Regimbau, Regimbau, Regimbau, Riccardo Ciolfi, Schneider, Schneider, Schneider, Schneider, Spergel, Stefania Marassi, Stella, Thompson, Thompson, Thompson, Tornatore, Turner, Valeria Ferrari, Woods   +50 more
core   +1 more source

INTEGRAL Observations of Magnetars

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT The INTEGRAL satellite has collected a large amount of data on magnetars in our Galaxy, spanning more than 20 years starting from 2003. The large data set obtained with the IBIS/ISGRI instrument at energies above 20 keV allows us to study both the properties and long‐term evolution of their persistent hard X‐ray emission and the population ...
Dominik Patryk Pacholski, Lorenzo Ducci, Martin Topinka, Sandro Mereghetti   +3 more
wiley   +1 more source

Probing the birth of fast rotating magnetars through high-energy neutrinos

, 2009
We investigate the high-energy neutrino emission expected from newly born magnetars surrounded by their stellar ejecta. Protons might be accelerated up to 0.1-100 EeV energies possibly by, e.g., the wave dissipation in the winds, leading to hadronic ...
B. Zhang, Bing Zhang, Kohta Murase, P. M. Woods, Peter Mészáros   +4 more
core   +1 more source

A Brief, Biased View of Neutron Star Cooling

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT This is a concise and non‐technical review of topics related to neutron star (NS) cooling, for both young NSs and NSs in low‐mass x‐ray binaries. Neutrino emission from the NS core drives cooling rates, via different processes including Urca processes and pair breaking and formation at the neutron superfluid critical temperature.
Craig Heinke
wiley   +1 more source

Spatially resolved X-ray study of supernova remnants that host magnetars: Implication of their fossil field origin [PDF]

Astronomy & Astrophysics, 2019
Magnetars are regarded as the most magnetized neutron stars in the Universe. Aiming to unveil what kinds of stars and supernovae can create magnetars, we have performed a state-of-the-art spatially resolved spectroscopic X-ray study of the supernova ...
P. Zhou, J. Vink, S. Safi-Harb, M. Miceli   +3 more
semanticscholar   +1 more source

The Minimum Variation Timescales of X-Ray Bursts from SGR J1935+2154

The Astrophysical Journal Supplement Series, 2023
The minimum variation timescale (MVT) of soft gamma-ray repeaters can be an important probe to estimate the emission region in pulsar-like models, as well as the Lorentz factor and radius of the possible relativistic jet in gamma-ray burst (GRB)–like ...
Shuo Xiao, Jiao-Jiao Yang, Xi-Hong Luo, Shao-Lin Xiong, Yuan-Hong Qu, Shuang-Nan Zhang, Wang-Chen Xue, Xiao-Bo Li, You-Li Tuo, Ai-Jun Dong, Ru-Shuang Zhao, Shi-Jun Dang, Lun-Hua Shang, Qing-Bo Ma, Ce Cai, Jin Wang, Ping Wang, Cheng-Kui Li, Shu-Xu Yi, Zhen Zhang, Ming-Yu Ge, Shi-Jie Zheng, Li-Ming Song, Wen-Xi Peng, Xiang-Yang Wen, Xin-Qiao Li, Zheng-Hua An, Xin Xu, Yue Wang, Chao Zheng, Yan-Qiu Zhang, Jia-Cong Liu, Bin Zhang, Wei Xie, Jian-Chao Feng, De-Hua Wang, Qi-Jun Zhi   +36 more
doaj   +1 more source

Structure, Deformations and Gravitational Wave Emission of Magnetars

, 2010
Neutron stars can have, in some phases of their life, extremely strong magnetic fields, up to 10^15-10^16 G. These objects, named magnetars, could be powerful sources of gravitational waves, since their magnetic field could determine large deformations ...
Abbott B, Abbott B, Bonazzola S, Ferrari V, Ioka K, Israel G L, Kluzniak W, Konno K, L Gualtieri, Lander S K Jones D I, Link B, Marchant P Reisenegger A Akgün T, Markey P, Ng C Y Kaspi V M, Palomba C, R Ciolfi, Stella L, Strohmayer T E, Tayler R J, Thompson C, V Ferrari, Wheeler J C, Wright G A E, Yoshida S   +23 more
core   +3 more sources

Characterizing the dynamical magnetosphere of the extremely slowly rotating magnetic O9.7 V star HD 54879 using rotational modulation of the Hα profile

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract The magnetic field in the O9.7 V star HD 54879 has been monitored for almost a decade. Spectropolarimetric observations reveal a rather strong mean longitudinal magnetic field that varies with a period of about 7.41 years. Observations in the Hα$$ \alpha $$ line show a variation with the same period, while the Hβ$$ \beta $$ line shows only ...
Manfred Küker, S. P. Järvinen, S. Hubrig, Ilya Ilyin, M. Schöller   +4 more
wiley   +1 more source