Results 21 to 30 of about 709 (205)

Cannonball or Bowling Ball: Proper Motion and Parallax for PSR J0002+6216

open access: yesThe Astrophysical Journal, 2023
We report the results of careful astrometric measurements of the cannonball pulsar J0002+6216 carried out over 3 yr using the High Sensitivity Array. We significantly refine the proper motion to μ = 35.3 ± 0.6 mas yr ^−1 and place new constraints on the ...
S. Bruzewski   +6 more
doaj   +1 more source

The Theory of Pulsar Winds and Nebulae [PDF]

open access: yes, 2009
We review current theoretical ideas on pulsar winds and their surrounding nebulae. Relativistic MHD models of the wind of the aligned rotator, and of the striped wind, together with models of magnetic dissipation are discussed. It is shown that the observational signature of this dissipation is likely to be point-like, rather than extended, and that ...
John G. Kirk   +2 more
openaire   +3 more sources

Supernova remnants in nearby galaxies

open access: yesAstronomische Nachrichten, Volume 341, Issue 2, Page 156-162, February 2020., 2020
Abstract Supernova remnants (SNRs) are the aftermath of stellar explosions, which inject large amounts of energy into the interstellar medium (ISM), carving out new structures and transferring kinetic energy to the ISM. They also act as recycling centers, which return elements processed in stars to the ISM, and cosmic particle accelerators.
Manami Sasaki
wiley   +1 more source

Turbulent Diffusion of the Particles within Pulsar Wind Nebulae

open access: yesThe Astrophysical Journal, 2023
A turbulent diffusion model is presented to account for the energy and spatial diffusion of the particles within pulsar wind nebulae (PWNe), with the assumption that the energy injected from the pulsar into the nebula is split between the turbulence ...
Fang-Wu Lu, Bo-Tao Zhu, Wen Hu, Li Zhang
doaj   +1 more source

Magnetic Reconnection in the Space Sciences: Past, Present, and Future

open access: yesJournal of Geophysical Research: Space Physics, Volume 125, Issue 2, February 2020., 2020
Abstract Magnetic reconnection converts, often explosively, stored magnetic energy to particle energy in space and in the laboratory. Through processes operating on length scales that are tiny, it facilitates energy conversion over dimensions of, in some cases, hundreds of Earth radii.
M. Hesse, P. A. Cassak
wiley   +1 more source

Pulsar Wind Nebulae in the SKA era [PDF]

open access: yesProceedings of Advancing Astrophysics with the Square Kilometre Array — PoS(AASKA14), 2015
Comments: 10 pages, 3 figures, to be published in: "Advancing Astrophysics with the Square Kilometre Array", Proceedings of Science, PoS(AASKA14)
Roberts, MSE   +6 more
openaire   +7 more sources

A new approach to generate a catalogue of potential historical novae

open access: yesAstronomische Nachrichten, Volume 341, Issue 1, Page 79-98, January 2020., 2020
Abstract Ancient Chinese, Korean, and Vietnamese observers left us records of celestial sightings, the so‐called “guest stars” dated up to ∼2500 years ago. Their identification with modern observable targets could open interesting insights into the long‐term behavior of astronomical objects, as shown by the successful identification of eight galactic ...
Susanne M. Hoffmann   +2 more
wiley   +1 more source

GEMINGA’S PUZZLING PULSAR WIND NEBULA [PDF]

open access: yesThe Astrophysical Journal, 2017
ABSTRACT We report on six new Chandra observations of the Geminga pulsar wind nebula (PWN). The PWN consists of three distinct elongated structures—two ≈ 0.2 d
B. Posselt   +8 more
openaire   +7 more sources

The Polarized Cosmic Hand: IXPE Observations of PSR B1509−58/MSH 15−52

open access: yesThe Astrophysical Journal, 2023
We describe IXPE polarization observations of the pulsar wind nebula (PWN) MSH 15−5 ^2 , the “Cosmic Hand.” We find X-ray polarization across the PWN, with B -field vectors generally aligned with filamentary X-ray structures.
Roger W. Romani   +102 more
doaj   +1 more source

Evolved Pulsar Wind Nebulae

open access: yesUniverse, 2023
Based on the expected population of core collapse supernova remnants and the huge number of detected pulsars in the Galaxy, still representing only a fraction of the real population, pulsar wind nebulae are likely to constitute one of the largest classes of extended Galactic sources in many energy bands. For simple evolutionary reasons, the majority of
openaire   +3 more sources

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