Results 71 to 80 of about 19,051 (197)
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 +26 more
wiley +1 more source
The Astrophysical Journal, 2023 We present the analysis of the magnetic field ( B -field) structure of galaxies measured with far-infrared (FIR) and radio (3 and 6 cm) polarimetric observations.
Alejandro S. Borlaff +15 more
doaj +1 more source
A NEW MODEL FOR GAMMA-RAY CASCADES IN EXTRAGALACTIC MAGNETIC FIELDS [PDF]
The Astrophysical Journal, 2011 5 pages, 5 figures, accepted for publication in Astrophysical Journal ...
Huan, H. +3 more
openaire +2 more sources
Modeling the Emission and Polarization Properties of Pulsating Ultraluminous X‐Ray Sources
Astronomische Nachrichten, Volume 346, Issue 1, January 2025.ABSTRACT Pulsating Ultraluminous X‐ray Sources (PULXs) are a class of extragalactic sources with high X‐ray luminosity, in excess of 1039$$ {10}^{39} $$ erg s−1$$ {\mathrm{s}}^{-1} $$, and showing pulsations that associate them with neutron stars accreting at a super‐Eddington rate.
S. Conforti +6 more
wiley +1 more source
Gamma-Ray Cosmology and Tests of Fundamental Physics
Galaxies, 2022 The propagation of gamma-rays over cosmological distances is the subject of extensive theoretical and observational research at GeV and TeV energies. The mean free path of gamma-rays in the cosmic web is limited above 100 GeV due to the production of ...
Jonathan Biteau, Manuel Meyer
doaj +1 more source
New Insights in Extragalactic Magnetic Fields
, 2019 Book collecting all the conference proceedings of Focus Meeting 8 "New Insights in Extragalactic Magnetic Fields" at the XXXth IAU General Assembly in Vienna, 2018.
Feretti, Luigina +2 more
openaire +1 more source
Evolution of Magnetic Field of the Quasar 1604+159 at parsec Scale
The Astrophysical JournalWe have analyzed the total intensity, spectral index, linear polarization, and rotation measure (RM) distributions at the parsec scale for the quasar 1604+159.
Xu-Zhi Hu +5 more
doaj +1 more source
Cosmic ray propagation with CRPropa 3
, 2014 Solving the question of the origin of ultra-high energy cosmic rays (UHECRs) requires the development of detailed simulation tools in order to interpret the experimental data and draw conclusions on the UHECR universe.
Batista, Rafael Alves +9 more
core +1 more source
Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers
Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto +9 more
wiley +1 more source
PARSEC: A Parametrized Simulation Engine for Ultra-High Energy Cosmic Ray Protons
, 2013 We present a new simulation engine for fast generation of ultra-high energy cosmic ray data based on parametrizations of common assumptions of UHECR origin and propagation.
Bretz, Hans-Peter +4 more
core +1 more source