Results 91 to 100 of about 8,336 (234)
Particle acceleration in Pulsars and Pulsar Wind Nebulae
These notes summarise the contents of the lectures I delivered at the International School of Physics "Enrico Fermi" on "Foundations of Cosmic Ray Astrophysics". The lectures were dealing with the physics of Pulsars and Pulsar Wind Nebulae (PWNe) in the Cosmic Ray (CR) perspective.
openaire +4 more sources
Neutrinos from the pulsar wind nebulae [PDF]
In the recent paper we calculated the $ $-ray spectra from pulsar wind nebulae (PWNe), assuming that a significant amount of the pulsar rotational energy is converted into relativistic nuclei. These nuclei accelerate leptons which are responsible for most of the observed electromagnetic emission from PWNe.
openaire +3 more sources
X-RAY EVOLUTION OF PULSAR WIND NEBULAE [PDF]
During the search for counterparts of very-high-energy gamma-ray sources, we serendipitously discovered large, extended, low surface brightness emission from PWNe around pulsars with the ages up to ~100 kyrs, a discovery made possible by the low and stable background of the Suzaku X-ray satellite.
Bamba, A.+6 more
openaire +4 more sources
The Boomerang Nebula is a bright radio and X-ray pulsar wind nebula (PWN) powered by an energetic pulsar, PSR J2229+6114. It is spatially coincident with one of the brightest ultrahigh-energy (UHE; ≥100 TeV) gamma-ray sources, LHAASO J2226+6057.
Xiao-Bin Chen+3 more
doaj +1 more source
HESS Observations of Pulsar Wind Nebulae [PDF]
6 pages, 3 figures, appeared in the proceedings of "Astrophysical Sources of High Energy Particles and Radiation", held in Torun, Poland, eds. T. Bulik, B.
openaire +3 more sources
A MODEL OF THE SPECTRAL EVOLUTION OF PULSAR WIND NEBULAE [PDF]
Recent observations suggest that many old pulsar wind nebulae (PWNe) are bright TeV gamma-ray sources without a strong X-ray counterpart. In this paper, we study the spectral evolution of PWNe taking into account the energy which was injected when they were young for old PWNe.
Shuta J. Tanaka, Fumio Takahara
openaire +5 more sources
Pulsar wind nebulae of runaway massive stars
ABSTRACT A significant fraction of massive stars move at speed through the interstellar medium of galaxies. After their death as core-collapse supernovae, a possible final evolutionary state is that of a fast-rotating magnetized neutron star, shaping its circumstellar medium into a pulsar wind nebula.
D M-A Meyer, Z Meliani
openaire +3 more sources
Radio Study of the Pulsar Wind Nebula Powered by PSR B1706-44
PSR B1706−44 is an energetic gamma-ray pulsar located inside supernova remnant (SNR) G343.1−2.3 and it powers a compact pulsar wind nebula (PWN) that shows torus and jet structure in X-rays.
Y. H. Liu, C.-Y. Ng, R. Dodson
doaj +1 more source
XMM-Newton and Chandra Observations of the Candidate Fermi-LAT Pulsar 4FGL J1015.5-6030
4FGL J1015.5-6030 is an unidentified Fermi-LAT source hosting a bright, extended X-ray source whose X-ray spectrum is consistent with that of a young pulsar, yet no pulsations have been found.
Jeremy Hare+4 more
doaj +1 more source
A candidate optical counterpart to the middle-aged gamma-ray pulsar PSR J1741-2054 [PDF]
We carried out deep optical observations of the middle-aged $\gamma$-ray pulsar PSR J1741-2054 with the Very Large Telescope (VLT). We identified two objects, of magnitudes $m_v=23.10\pm0.05$ and $m_v=25.32\pm0.08$, at positions consistent with the very ...
Belfiore, A.+9 more
core +2 more sources