Results 91 to 100 of about 6,506 (234)

Understanding the evolution of Pulsar Wind Nebulae

Proceedings of High Energy Phenomena in Relativistic Outflows VIII — PoS(HEPROVIII)
Pulsar Wind nebulae are visible as bright and extended sources at a wide range of energies, with varying properties and morphology along their different evolutionary stages.
B. Olmi
semanticscholar   +1 more source

Deriving pulsar pair-production multiplicities from pulsar wind nebulae using H.E.S.S. and LHAASO observations [PDF]

Astronomy & Astrophysics
Pulsar wind nebulae (PWNe) dominate the galactic gamma-ray sky at very high energies and they are major contributors to the leptonic cosmic ray flux. However, the question of whether or not pulsars also accelerate ions to comparable energies has not yet ...
S. T. Spencer, Alison M. W. Mitchell
semanticscholar   +1 more source

Gigahertz-peaked spectra pulsars in Pulsar Wind Nebulae [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
We have carried out a detailed study of the spectral nature of six pulsars surrounded by Pulsar wind nebulae (PWN). The pulsar flux density were estimated using the interferometric imaging technique of the Giant Metrewave Radio Telescope at three frequencies 325 MHz, 610 MHz and 1280 MHz. The spectra showed a turnover around gigahertz frequency in four
Karolina Rożko, Rahul Basu, Rahul Basu, Jarosław Kijak, Wojciech Lewandowski   +4 more
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The contribution of Galactic TeV pulsar wind nebulae to Fermi-LAT diffuse emission

, 2021
The large-scale diffuse γ−ray flux observed by Fermi-LAT in the 1-100 GeV energy range, parameterized as ∝ E−Γ, has a spectral index Γ that depends on the distance from the Galactic center.
V. Vecchiotti, G. Pagliaroli, F. Villante   +2 more
semanticscholar   +1 more source

Particle acceleration in Pulsars and Pulsar Wind Nebulae

, 2022
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

HESS Observations of Pulsar Wind Nebulae [PDF]

AIP Conference Proceedings, 2005
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]

The Astrophysical Journal, 2010
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

First Detection of Polarization in X-Rays for PSR B0540-69 and Its Nebula

The Astrophysical Journal
We report on X-ray polarization measurements of the extragalactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud, using a ∼850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IXPE. No
Fei Xie, Josephine Wong, Fabio La Monaca, Roger W. Romani, Jeremy Heyl, Philip Kaaret, Alessandro Di Marco, Niccolò Bucciantini, Kuan Liu, Chi-Yung Ng, Niccolò Di Lalla, Martin C. Weisskopf, Enrico Costa, Paolo Soffitta, Fabio Muleri, Matteo Bachetti, Maura Pilia, John Rankin, Sergio Fabiani, Iván Agudo, Lucio A. Antonelli, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Wataru Iwakiri, Svetlana G. Jorstad, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Alan P. Marscher, Herman L. Marshall, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Michela Negro, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Andrea Possenti, Juri Poutanen, Simonetta Puccetti, Brian D. Ramsey, Ajay Ratheesh, Oliver J. Roberts, Carmelo Sgrò, Patrick Slane, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Kinwah Wu, Silvia Zane, IXPE Collaboration, Zorawar Wadiasingh, Wynn C. G. Ho, Alice K. Harding, Keith C. Gendreau, Zaven Arzoumanian   +103 more
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Emission of cosmic rays from Pulsar wind nebulae

Journal of Physics: Conference Series, 2021
The goal of the paper is to interpret AMS-02 positron data. Most of the positrons come from secondary production which can fit well the data below 10 GeV.
X. Dai
semanticscholar   +1 more source

Comparison between the Emission Torus and the Measured Toroidal Magnetic Field for the Crab and Vela Nebulae

The Astrophysical Journal
Polarization measurements provide insight into the magnetic field, a critical aspect of the dynamics and emission properties around the compact object.
Wei Deng, Fei Xie, Kuan Liu, Mingyu Ge, Youli Tuo, Fabio La Monaca, Alessandro Di Marco, En-wei Liang   +7 more
doaj   +1 more source