Results 51 to 60 of about 8,830 (213)

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

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

Pulsar Wind Nebulae in the SKA era [PDF]

Proceedings 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, Possenti, A, Stappers, B, Hessels, JWT, Ng, SCY, Breton, RP, Gelfand, JD   +6 more
openaire   +7 more sources

Rings and Jets around PSR J2021+3651: the `Dragonfly Nebula'

, 2008
We describe recent Chandra ACIS observations of the Vela-like pulsar PSR J2021+3651 and its pulsar wind nebula (PWN). This `Dragonfly Nebula' displays an axisymmetric morphology, with bright inner jets, a double-ridged inner nebula, and a ~30" polar jet.
Adam Van Etten, C.‐Y. Ng, English J., Rees M. J., Roger W. Romani, Zavlin V. E.   +5 more
core   +1 more source

Laue Gamma‐Ray Lenses for Space Astrophysics: Status and Prospects

X-Ray Optics and Instrumentation, Volume 2010, Issue 1, 2010., 2010
We review feasibility studies, technological developments, and the astrophysical prospects for Laue lenses devoted to hard X‐/gamma‐ray astronomy observations.
Filippo Frontera, Peter von Ballmoos, Stephen L. O′Dell   +2 more
wiley   +1 more source

Diffusive synchrotron radiation from pulsar wind nebulae [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
Diffusive Synchrotron Radiation (DSR) is produced by charged particles as they random walk in a stochastic magnetic field. The spectrum of the radiation produced by particles in such fields differs substantially from those of standard synchrotron emission because the corresponding particle trajectories deviate significantly from gyration in a regular ...
Fleishman, G. D., Bietenholz, M. F.
openaire   +2 more sources

HESS J1632-478: an energetic relic [PDF]

, 2010
HESS J1632-478 is an extended and still unidentified TeV source in the galactic plane. In order to identify the source of the very high energy emission and to constrain its spectral energy distribution, we used a deep observation of the field obtained ...
Balbo, M., Pavan, L., Pohl, M., Saouter, P., Tramacere, A., Walter, R., Zurita-Heras, J. -A.   +6 more
core   +4 more sources

Simulated synchrotron emission from pulsar wind nebulae [PDF]

Astronomy & Astrophysics, 2006
A complete set of diagnostic tools aimed at producing synthetic synchrotron emissivity, polarization, and spectral index maps from relativistic MHD simulations is presented. As a first application we consider here the case of the emission from Pulsar Wind Nebulae (PWNe).
DEL ZANNA, LUCA, D. VOLPI, E. AMATO, N. BUCCIANTINI   +3 more
openaire   +3 more sources