Results 61 to 70 of about 10,429 (199)

Probing the physics of newly born magnetars through observation of superluminous supernovae

, 2018
The central engines of some superluminous supernovae (SLSNe) are generally suggested to be newly born fast rotating magnetars, which spin down mainly through magnetic dipole radiation and gravitational wave emission.
Cheng, Quan, Yu, Yun-Wei, Zhang, Shuang-Nan, Zheng, Xiao-Ping   +3 more
core   +1 more source

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

The First Day in the Life of a Magnetar: Evolution of the Inclination Angle, Magnetic Dipole Moment and Braking Index of Millisecond Magnetars During Gamma-Ray Burst Afterglows

, 2019
The afterglow emission of some gamma-ray bursts (GRBs) show a shallow decay (plateau) phase implying continuous injection of energy. The source of this energy is very commonly attributed to the spin-down power of a nascent millisecond magnetar.
Andaç, I. Ceyhun, Aygun, Ugur, Ekşi, K. Yavuz, Mus, Sinem Sasmaz, Çıkıntoğlu, Sercan   +4 more
core   +1 more source

Heavy Elements and Electromagnetic Transients from Neutron Star Mergers

Annalen der Physik, Volume 536, Issue 2, February 2024.
Astro‐(physics) has made major leaps forward through the combined information provided by both gravitational waves and electromagnetic emission from the first detected neutron star merger event. This review provides an up‐to‐date overview of today's understanding of neutron star mergers and their electromagnetic emission and it discusses possible ...
Stephan Rosswog, Oleg Korobkin
wiley   +1 more source

Pulsed γ-ray emission from magnetar 1E 2259+586 [PDF]

Journal of Astronomy and Space Sciences, 2013
Anomalous X-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strong magnetic fields of >1014 Gauss.
Jason Hung Kit Wu, Chung Yue Hui, Regina Hsiu Hui Huang, Albert Kwok Hing Kong, Kwong Sang Cheng, Jumpei Takata, Pak Hin Thomas Tam, Eric Man Ho Wu, Joe Liu   +8 more
doaj   +1 more source

Twisted magnetar magnetospheres

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT Magnetar magnetospheres are strongly twisted, and are able to power sudden energetic events through the rapid release of stored electromagnetic energy. In this paper, we investigate twisted relativistic force-free axisymmetric magnetospheres of rotating neutron stars.
D Ntotsikas, K N Gourgouliatos, I Contopoulos, S K Lander   +3 more
openaire   +4 more sources

Seltene und extreme Supernovae

Physik in unserer Zeit, Volume 55, Issue 1, Page 40-46, January 2024.
Robotische Teleskope entdecken eine zunehmende Vielfalt transienter Strahlungsquellen, deren ungewöhnliche Eigenschaften neue Arten von Sternexplosionen nahelegen. Obwohl die absolute Häufigkeit solcher Ereignisse sehr klein ist, erlaubt ihre extreme Helligkeit relativ häufige Sichtungen, stellt aber theoretische Modelle vor große Herausforderungen ...
Hans‐Thomas Janka
wiley   +1 more source

X-ray Polarization from Magnetar Sources

Galaxies
The launch of the IXPE telescope in late 2021 finally made polarization measurements in the 2–8keV band a reality, more than 40 years after the pioneering observations of the OSO-8 satellite.
Roberto Taverna , Roberto Turolla 
doaj   +1 more source

Activated Magnetospheres of Magnetars

, 2010
Like the solar corona, the external magnetic field of magnetars is twisted by surface motions of the star. The twist energy is dissipated over time. We discuss the theory of this activity and its observational status.
A Tiengo, AI Ibrahim, AM Beloborodov, B Paczy´nski, BC Low, C Kouveliotou, C Thompson, C Thompson, C Thompson, C Thompson, DA Uzdensky, EV Gotthelf, F Bernardini, F Camilo, FP Gavriil, JK Daugherty, JP Halpern, JP Halpern, L Kuiper, L Nobili, L Pavan, M Durant, M Lyutikov, M Lyutikov, ME Gonzalez, MG Baring, MP Muno, N Rea, NS Kardashev, P Esposito, P Esposito, P Goldreich, PM Woods, PM Woods, PR Hartog den, R Dib, R Perna, R Perna, R Wolfson, R Wolfson, S Mereghetti, S Zane, S. Mereghetti, SJ Sturner, T Enoto, T Enoto, Y Lyubarsky, YE Lyubarsky, Z Medin   +48 more
core   +1 more source

Role of Time‐Varying Magnetic Field on QGP Equation of State

Advances in High Energy Physics, Volume 2024, Issue 1, 2024.
The phase diagram of quantum chromodynamics (QCD) and its associated thermodynamic properties of quark‐gluon plasma (QGP) are studied in the presence of time‐dependent magnetic field. The study plays a pivotal role in the field of cosmology, astrophysics, and heavy‐ion collisions. In order to explore the structure of quark‐gluon plasma to deal with the
Yogesh Kumar, Poonam Jain, Pargin Bangotra, Vinod Kumar, D. V. Singh, S. K. Rajouria, Bhartendu K. Singh   +6 more
wiley   +1 more source