Results 101 to 110 of about 4,909 (237)

Novel Astrophysical Constraints on Black Holes

open access: yes, 2019
While black holes have captured both the public and scientific interest, they are still counted amongst the most mysterious objects in the Universe. In this dissertation, we study these objects from an astrophysical perspective.
Christian, Pierre
core  

Unsupervised Deep Representation Learning for Infrasound Phase Identification

open access: yesEarth and Space Science, Volume 13, Issue 6, June 2026.
Abstract Infrasound phase identification is challenging because atmospheric variability strongly influences signal propagation on short timescales that are not resolved by standard atmospheric models. While traditional approaches rely on propagation modeling and array‐derived parameters, recent work suggests that waveform structure itself encodes ...
Miro Ronac Giannone   +2 more
wiley   +1 more source

The Interior of Black Holes and their Astrophysics

open access: yes, 2002
Gravity warps space and time into a funnel and generates a black hole when a cosmic body undergoes a catastrophic collapse. What can one say about the interior of a black hole? The important point is that inside a black hole the space radial direction becomes time, and time becomes a space direction.
Artemova, Yulia, Novikov, Igor
openaire   +2 more sources

Deep Origin and Shallow Launch for the Etna 122 B.C. Mafic Plinian Eruption

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract Basaltic Plinian eruptions challenge our understanding of explosive volcanism. The 122 B.C. Plinian eruption of Etna ranks among the most powerful mafic explosive events known. Here, we combine volatile barometry of 122 B.C. from olivine‐hosted melt and fluid inclusions with comparative data from the sub‐Plinian Fall Stratified eruption at ...
M. Gavrilenko   +6 more
wiley   +1 more source

Primordial black holes, astrophysical systems and the Eddington-Weinberg relation

open access: yes, 2011
Starting from a quantization relation for primordial black holes, it is shown that quantum fluctuations can play a fundamental role in determining the effective scales of self-gravitating astrophysical systems.
DE LAURENTIS, MARIAFELICIA   +5 more
core   +1 more source

GW231123: Likely a Product of Successive Mergers from ∼10 Stellar-mass Black Holes

open access: yesThe Astrophysical Journal
GW231123 is an exceptionally massive binary black hole (BBH) merger with unusually high component spins. Such extreme properties challenge conventional stellar evolution models, predicting a black hole (BH) mass gap due to pair-instability supernovae. We
Yin-Jie Li   +3 more
doaj   +1 more source

A Note on the Observational Evidence for the Existence of Event Horizons in Astrophysical Black Hole Candidates

open access: yesThe Scientific World Journal, 2013
Black holes have the peculiar and intriguing property of having an event horizon, a one-way membrane causally separating their internal region from the rest of the Universe.
Cosimo Bambi
doaj   +1 more source

Geoelectric Field Caused by Flux Transfer Events in an Ionosphere‐Coupled Vlasiator Simulation

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract We report on the relationship between flux transfer events (FTEs) at Earth's magnetopause and the geoelectric field that is induced near the FTEs' magnetic footpoints. We study this system using the global hybrid‐Vlasov code Vlasiator, which has recently been extended to model ionospheric physics.
K. Horaites   +12 more
wiley   +1 more source

Massive black holes in galactic nuclei

open access: yes
Massive black holes are key inhabitants of the nuclei of galaxies. Moreover, their astrophysical relevance has gained significant traction in recent years, thanks especially to the amazing results that are being (or will be) delivered by instruments such
Lupi A.   +4 more
core   +1 more source

Black Holes

open access: yes, 2011
Black holes, once considered to be of purely theoretical interest, play an important role in observational astronomy and a range of astrophysical phenomena.

core   +1 more source

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