Results 91 to 100 of about 55,540 (200)
Super-Eddington Accretion onto Black Holes and Its Application to Fallback Accretion
The Astrophysical JournalWe study the problem of steady-state spherical accretion onto a black hole, in which the internal energy of the flow is governed by radiation and photon diffusion dominates the energy flux at large radii.
Tamar Faran, Eliot Quataert
doaj +1 more source
The Meissner effect for weakly isolated horizons
, 2017 Black holes are important astrophysical objects describing an end state of stellar evolution, which are observed frequently. There are theoretical predictions that Kerr black holes with high spins expel magnetic fields. However, Kerr black holes are pure
Gürlebeck, Norman, Scholtz, Martin
core +1 more source
The Gannon Storm's Impact on Electric and Magnetic Fields in Italy: A Regional Perspective
Space Weather, Volume 24, Issue 1, January 2026.Abstract The intense May 2024 geomagnetic storm provided an opportunity to conduct the first analysis of geoelectric hazards in Italy. Data from three geomagnetic observatories and a magnetotelluric station were analyzed to examine the spatiotemporal evolution of storm‐induced variations.
Giulia Pignatiello +5 more
wiley +1 more source
Scalar-Tensor Black Holes Embedded in an Expanding Universe
Universe, 2018 In this review, we focus our attention on scalar-tensor gravity models and their empirical verification in terms of black hole and wormhole physics.
Daria Tretyakova, Boris Latosh
doaj +1 more source
Driving Dynamical Inner‐Heliosphere Models With In Situ Solar Wind Observations
Space Weather, Volume 24, Issue 1, January 2026.Abstract Accurately reconstructing the solar wind throughout the inner heliosphere is essential for understanding solar–terrestrial interactions and improving space‐weather forecasts. Conventional reconstruction methods rely on photospheric magnetic field observations and coronal models to estimate solar wind conditions near the Sun, typically at 0.1 ...
M. J. Owens +10 more
wiley +1 more source
Novel Polarimetric Analysis of Near-horizon Flaring Episodes in M87* in Millimeter Wavelength
The Astrophysical JournalRecent multiwavelength observations of M87* revealed a high-energy γ -ray flare without a millimeter counterpart. We present a theoretical study of potential millimeter flares in M87*, using general relativistic magnetohydrodynamical simulations with ...
Razieh Emami +17 more
doaj +1 more source
A note on the resonant frequencies of rapidly rotating black holes
, 2004 I discuss the range of validity of Detweiler's formula for the resonant frequencies of rapidly rotating Kerr black holes. While his formula is correct for extremal black holes, it has also been commonly accepted that it describes very well the resonant ...
A. A. Starobinsky +9 more
core +1 more source
Spinning Black Holes in Astrophysical Environments
Physical Review Letters5 pages, 2 figures + supplemental material; V2: Accepted for publication in Physical Review ...
Pedro G. S. Fernandes, Vitor Cardoso
openaire +2 more sources
BRANEWORLD BLACK HOLES IN COSMOLOGY AND ASTROPHYSICS
International Journal of Modern Physics D, 2005 The braneworld description of our universe entails a large extra dimension and a fundamental scale of gravity that might be lower by several orders of magnitude compared to the Planck scale. An interesting consequence of the braneworld scenario is in the nature of spherically symmetric vacuum solutions to the brane gravitational field equations which ...
Majumdar, A. S., Mukherjee, N.
openaire +3 more sources
, 2003 We investigate the electromagnetic radiation released during the high energy collision of a charged point particle with a four-dimensional Schwarzschild black hole. We show that the spectra is flat, and well described by a classical calculation.
C.S. Wang Chang +35 more
core +1 more source