Results 41 to 50 of about 8,830 (213)

Astronomical Signatures of Dark Matter

Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014
Several independent astronomical observations in different wavelength bands reveal the existence of much larger quantities of matter than what we would deduce from assuming a solar mass to light ratio. They are very high velocities of individual galaxies within clusters of galaxies, higher than expected rotation rates of stars in the outer regions of ...
Paul Gorenstein, Wallace Tucker, Anselmo Meregaglia   +2 more
wiley   +1 more source

A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7

, 2005
We report on a possible association of the recently discovered very high-energy $\gamma$-ray source HESS J1825--137 with the pulsar wind nebula (commonly referred to as G 18.0--0.7) of the $2.1\times 10^{4}$ year old Vela-like pulsar PSR B1823--13.
A. Djannati-Ataï, A. G. Akhperjanian, A. Jacholkowska, A. Konopelko, A. Lemière, A. M. Brown, A. Marcowith, A. Noutsos, A. R. Bazer-Bachi, A. Reimer, Aharonian, Aharonian, Aharonian, Aharonian, Aharonian, B. C. Raubenheimer, B. Degrange, B. Giebels, B. Khélifi, Bernlöhr, Blondin, Bucciantini, C. Boisson, C. G. Théoret, C. Hadjichristidis, C. Masterson, C. Schuster, C. Stegmann, C. Venter, Clifton, D. Berge, D. Emmanoulopoulos, D. Horns, D. Spangler, F. A. Aharonian, F. Breitling, F. Feinstein, Funk, G. Dubus, G. Fontaine, G. Heinzelmann, G. Henri, G. Hermann, G. Pelletier, G. Pühlhofer, G. Rowell, G. Vasileiadis, Gaensler, H. J. Dickinson, H. J. Völk, H. Sol, Hartman, Hinton, I. Braun, I. J. Latham, J. A. Hinton, J. F. Glicenstein, J. L. Osborne, J. M. Martin, J. Raux, J. Ripken, J.-P. Tavernet, K. Bernlöhr, K. J. Orford, L. Costamante, L. O'C. Drury, , L. Rob, L. Rolland, L. Saugé, L.-M. Chounet, M. Beilicke, M. de Naurois, M. Hauser, M. Holleran, M. Lemoine-Goumard, M. Ouchrif, M. Panter, M. Punch, M. Raue, M. Siewert, M. Tluczykont, N. Leroy, Nel, Nolan, Nu. Komin, O. Bolz, O. C. de Jager, O. Martineau-Huynh, O. Reimer, P. Espigat, P. Goret, P. M. Chadwick, P. Vincent, R. Cornils, R. Le Gallou, R. Schlickeiser, R. Steenkamp, R. Terrier, S. Funk, S. Gillessen, S. J. Nolan, S. J. Wagner, S. M. Rayner, S. Pita, S. Schlenker, T. J. L. McComb, T. Lohse, U. Schwanke, V. Borrel, V. Sahakian, van der Swaluw, W. Benbow, W. Hofmann, Y. A. Gallant, Y. Fuchs   +114 more
core   +2 more sources

Multimessengers from Core‐Collapse Supernovae: Multidimensionality as a Key to Bridge Theory and Observation

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
Core‐collapse supernovae are dramatic explosions marking the catastrophic end of massive stars. The only means to get direct information about the supernova engine is from observations of neutrinos emitted by the forming neutron star, and through gravitational waves which are produced when the hydrodynamic flow or the neutrino flux is not perfectly ...
Kei Kotake, Tomoya Takiwaki, Yudai Suwa, Wakana Iwakami Nakano, Shio Kawagoe, Youhei Masada, Shin-ichiro Fujimoto, Andrew Fruchter   +7 more
wiley   +1 more source

Turbulent Magnetic Relaxation in Pulsar Wind Nebulae [PDF]

The Astrophysical Journal, 2017
Abstract We present a model for magnetic energy dissipation in a pulsar wind nebula. A better understanding of this process is required to assess the likelihood that certain astrophysical transients may be powered by the spin-down of a “millisecond magnetar.” Examples include superluminous supernovae, gamma-ray bursts, and anticipated ...
Jonathan Zrake, Jonathan Arons
openaire   +2 more sources

A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant

, 2009
A pulsar wind nebula inside a supernova remnant provides a unique insight into the properties of the central neutron star, the relativistic wind powered by its loss of rotational energy, its progenitor supernova, and the surrounding environment.
Aharonian, Aharonian, Arons, Bandiera, Blondin, Blondin, Büsching, Chandrasekhar, Chevalier, Chevalier, Frail, Gelfand, Green, Joseph D. Gelfand, Jun, Kaplan, Kothes, LaMassa, Malyshev, Milne, Mori, Pacholczyk, Patrick O. Slane, Rees, Rybicki, Sedov, Sefako, Shapiro, Slane, Slane, Spitkovsky, Stone, Temim, Temim, Truelove, van der Swaluw, Venter, Weiqun Zhang, Weisskopf, Woltjer   +39 more
core   +1 more source

Spectral signature of a free pulsar wind in the gamma-ray binaries LS 5039 and LSI +61$\degr$303 [PDF]

, 2008
LS 5039 and LSI +61$\degr$303 are two binaries that have been detected in the TeV energy domain. These binaries are composed of a massive star and a compact object, possibly a young pulsar.
Aharonian, Aharonian, Albert, B. Cerutti, Ball, Ball, Begelman, Blumenthal, Bogovalov, Bogovalov, Bosch-Ramon, Casares, Casares, Chernyakova, Dubus, Dubus, Dubus, Eichler, Fargion, G. Dubus, G. Henri, Grundstrom, Hartman, Johnston, Jones, Kennel, Khangulyan, Kirk, Komissarov, McSwain, Rees, Romero, Sierpowska, Stevens, Waters, Zdziarski   +35 more
core   +3 more sources

Proton Acceleration with Relativistic Electromagnetic Shock

Advanced Science, Volume 12, Issue 30, August 14, 2025.
New Ion Acceleration Mechanism! A novel cosmic‐ray proton acceleration mechanism is proposed, where relativistic electromagnetic shocks accelerate protons transversely. Hamiltonian analysis yields a scaling law linking the proton energy to the minimum longitudinal thickness of the shock.
Ting Xiao, Xiaomei Zhang, Fanqiu Kong, Xiaolong Zheng, Zheng Gong, Baifei Shen   +5 more
wiley   +1 more source

Pulsar‐Driven Jets in Supernovae, Gamma‐Ray Bursts, and the Universe

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
The bipolarity of Supernova 1987A can be understood through its very early light curve from the CTIO 0.4 m telescope and IUE FES and following speckle observations of the “Mystery Spot”. These indicate a beam/jet of light/particles, with initial collimation factors >104 and velocities >0.95 c, involving up to 10−5 M⊙ interacting with circumstellar ...
John Middleditch, Alberto J. Castro-Tirado   +1 more
wiley   +1 more source

The imprint of pulsar parameters on the morphology of Pulsar Wind Nebulae

, 2016
The morphology of young Pulsar Wind Nebulae (PWN) is largely determined by the properties of the wind injected by the pulsar. We have used a recent parametrization of the wind obtained from Force Free Electrodynamics simulations of pulsar magnetospheres ...
Buehler, Rolf, Giomi, Matteo
core   +1 more source

The effects of spin-down on the structure and evolution of pulsar wind nebulae [PDF]

, 2004
We present high resolution spherically symmetric relativistic magnetohydrodynamical simulations of the evolution of a pulsar wind nebula inside the free expanding ejecta of the supernova progenitor.
Blondin, Blondin, Bucciantini, Camilo, Chevalier, Chevalier, Chevalier, Del Zanna, Del Zanna, Dwarkadas, E. Amato, Emmering, Featherstone, Fesen, Goldreich, J. M. Blondin, Jun, Karni, Kennel, Komissarov, Kun, L. Del Zanna, Lyne, Lyne, Matzner, Michel, N. Bucciantini, R. Bandiera, Rees, Reynolds, Sankrit, Shyue, Sollerman, van der Swaluw, van der Swaluw   +34 more
core   +2 more sources