Results 11 to 20 of about 10,429 (199)
Astronomische NachrichtenABSTRACTThe 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 ...
Pacholski D. P. +3 more
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Observations of Radio Magnetars with the Deep Space Network
Advances in Astronomy, 2019 The Deep Space Network (DSN) is a worldwide array of radio telescopes which supports NASA’s interplanetary spacecraft missions. When the DSN antennas are not communicating with spacecraft, they provide a valuable resource for performing observations of ...
Aaron B. Pearlman +2 more
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The Astrophysical Journal, 2016 ABSTRACT We examine four candidate mechanisms that could explain the high surface temperatures of magnetars. (1) Heat flux from the liquid core heated by ambipolar diffusion. It could sustain the observed surface luminosity erg s−1 if core heating offsets neutrino cooling ...
Beloborodov, Andrei M., Li, Xinyu
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Anisotropic Behavior of S‐Wave and P‐Wave States of Heavy Quarkonia at Finite Magnetic Field
Advances in High Energy Physics, Volume 2023, Issue 1, 2023., 2023 We studied the effect of momentum space anisotropy on heavy quarkonium states using an extended magnetized effective fugacity quasiparticle model (EQPM). Both the real and imaginary part of the potential has been modified through the dielectric function by including the anisotropic parameter ξ.
Manohar Lal +4 more
wiley +1 more source
Advances in High Energy Physics, Volume 2022, Issue 1, 2022., 2022 In this paper, we have investigated the density perturbations and cosmological evolution in the FLRW universe in the presence of a cosmic magnetic field, which may be assumed to mimic primordial magnetic fields. Such magnetic fields have sufficient strength to influence galaxy formation and cluster dynamics, thereby leaving an imprint on the CMB ...
Samarjit Chakraborty +2 more
wiley +1 more source
Impacts of Ionospheric Ions on Magnetic Reconnection and Earth's Magnetosphere Dynamics
Reviews of Geophysics, Volume 59, Issue 3, September 2021., 2021 Abstract Ionospheric ions (mainly H+, He+, and O+) escape from the ionosphere and populate the Earth's magnetosphere. Their thermal energies are usually low when they first escape the ionosphere, typically a few electron volt to tens of electron volt, but they are energized in their journey through the magnetosphere.
S. Toledo‐Redondo +15 more
wiley +1 more source
Temporary Singularities and Axions: An Analytic Solution that Challenges Charge Conservation
Annalen der Physik, Volume 533, Issue 6, June 2021., 2021 Is charge conservation sacrosact? If so, why? Even when local charge conservation remains in force, the presence of a temporary singularity can give rise to surprising results. This work shows how global charge conservation can be broken after the combined appearance of both new charge and an axion‐like field from the singularity.
Jonathan Gratus +2 more
wiley +1 more source
American Journal of Physics, 2000 Abstract I summarize recent observational and theoretical advances in the understanding of the Soft Gamma Repeaters and the Anomalous X-ray Pulsars. Several direct physical arguments point to very strong magnetic fields (B > 10 BQED = 4.4 × 1014 G) in SGR outbursts. The connection between these two classes of neutron stars is examined.
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A search for runaway stars in 12 Galactic supernova remnants
Astronomische Nachrichten, Volume 342, Issue 3, Page 553-577, March 2021., 2021 Runaway stars can result from core‐collapse supernovae in multiple stellar systems. If the supernova disrupts the system, the companion is ejected with its former orbital velocity. A clear identification of a runaway star can yield the time and place of the explosion, as well as orbital parameters of the pre‐supernova binary system.
Oliver Lux +3 more
wiley +1 more source
A Quarter Century of Wind Spacecraft Discoveries [PDF]
Rev Geophys, 2021 Abstract The Wind spacecraft, launched on November 1, 1994, is a critical element in NASA’s Heliophysics System Observatory (HSO)—a fleet of spacecraft created to understand the dynamics of the Sun‐Earth system. The combination of its longevity (>25 years in service), its diverse complement of instrumentation, and high resolution and accurate ...
Wilson L +13 more
europepmc +2 more sources