Results 41 to 50 of about 6,070 (203)

Multiwavelength Observations of Pulsar Wind Nebulae

, 2010
The extended nebulae formed as pulsar winds expand into their surroundings provide information about the composition of the winds, the injection history from the host pulsar, and the material into which the nebulae are expanding. Observations from across
A Lemiere, A Pellizzoni, A Spitkovsky, AA Abdo, BM Gaensler, BM Gaensler, DA Frail, DA Green, DK Milne, E Giacani, E Swaluw van der, EV Gotthelf, F Bocchino, F Pacini, FA Aharonian, FA Aharonian, FR Stephenson, GC Rudie, J Fang, JD Gelfand, JM Blondin, MC Begelman, MF Bietenholz, N Bucciantini, OC Jager de, P Slane, P Slane, P Slane, PA Shaver, RA Chevalier, RA Chevalier, S Funk, SM LaMassa, SP Reynolds, T Temim, T Temim, V Mangano, YA Shibanov, YE Lyubarsky   +38 more
core   +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

Possible TeV Source Candidates In The Unidentified EGRET Sources [PDF]

, 2004
We study the $\gamma$-ray emission from the pulsar magnetosphere based on outer gap models, and the TeV radiation from pulsar wind nebulae (PWNe) through inverse Compton scattering using a one-zone model.
Cheng, K. S., Jiang, Z. J., Pun, C. S. J., Wang, W.   +3 more
core   +3 more sources

Beyond Accretion Limits: The Rise of Pulsating Gems

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT The discovery of several ultraluminous X‐ray sources exhibiting fast and rapidly evolving X‐ray pulsations unequivocally associates these sources with accreting neutron stars orbiting relatively massive companion stars (> 8M ⊙$$ {}_{\odot } $$).
Gian Luca Israel, Roberta Amato, Matteo Imbrogno, Nicoló Oreste Pinciroli Vago, on behalf of a Larger Team, Guillermo Andres Rodríguez Castillo, Andrea Belfiore, Luigi Stella, Matteo Bachetti, Felix Fürst, Dom Walton, Matthew Middleton, Murray Brightman, Fabio Pintore, Ciro Pinto, Silvia Conforti, Luca Zampieri, Chiara Salvaggio, Anna Wolter, Andrea Tiengo, Andrea De Luca, Paolo Esposito, Ruben Salvaterra, Hannah Earnshaw, Tim Roberts, Andres Gúrpide, Sara Motta   +26 more
wiley   +1 more source

Focusing X‐Ray Optics for Astronomy

X-Ray Optics and Instrumentation, Volume 2010, Issue 1, 2010., 2010
Focusing X‐ray telescopes have been the most important factor in X‐ray astronomy’s ascent to equality with optical and radio astronomy. They are the prime tool for studying thermal emission from very high temperature regions, non‐thermal synchrotron radiation from very high energy particles in magnetic fields and inverse Compton scattering of lower ...
Paul Gorenstein, Stephen L. O′Dell
wiley   +1 more source

Pulsar Wind Nebulae with Thick Toroidal Structure

, 2011
We investigate a class of pulsar wind nebulae that show synchrotron emission from a thick toroidal structure. The best studied such object is the small radio and X-ray nebula around the Vela pulsar, which can be interpreted as the result of interaction ...
Abdo, Arzoumanian, Bietenholz, Bietenholz, Blondin, Bogovalov, Chevalier, Chevalier, Dodson, Gaensler, Halpern, Kargaltsev, Kothes, Kothes, Landau, Lu, Mizuno, Ng, Pavlov, Stone   +19 more
core   +1 more source

Multiband Nonthermal Radiative Study of PeVatron Candidate Pulsar Wind Nebula HESS J1849-000

The Astrophysical Journal
Pulsar wind nebula HESS J1849-000 is one of the sources that may emit PeV γ -ray photons based on the recent measurement by the Tibet Air Shower Array and the Large High Altitude Air Shower Observatory.
Bo-Tao Zhu, Fang-Wu Lu, Li Zhang
doaj   +1 more source

4FGL J1844.4–0306: High-energy Emission Likely from the Supernova Remnant G29.37 + 0.1

The Astrophysical Journal, 2023
Very-high-energy (VHE) observations have revealed approximately 100 TeV sources in our Galaxy, and a significant fraction of them are under investigation to understand their origin. We report our study of one of them, HESS J1844−030.
Dong Zheng, Zhongxiang Wang, Xiao Zhang, Yang Chen, Yi Xing   +4 more
doaj   +1 more source

Heavy Elements and Electromagnetic Transients from Neutron Star Mergers

Annalen der Physik, Volume 536, Issue 2, February 2024.
Astro‐(physics) has made major leaps forward through the combined information provided by both gravitational waves and electromagnetic emission from the first detected neutron star merger event. This review provides an up‐to‐date overview of today's understanding of neutron star mergers and their electromagnetic emission and it discusses possible ...
Stephan Rosswog, Oleg Korobkin
wiley   +1 more source

The Dark Matter Annihilation Signal from Dwarf Galaxies and Subhalos

Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010
Dark Matter annihilation holds great potential for directly probing the clumpiness of the Galactic halo that is one of the key predictions of the Cold Dark Matter paradigm of hierarchical structure formation. Here we review the γ‐ray signal arising from dark matter annihilation in the centers of Galactic subhalos.
Michael Kuhlen, Andrey V. Kravtsov
wiley   +1 more source