Results 61 to 70 of about 56,013 (217)

Astrophysical Black Holes: A Review [PDF]

Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII — PoS(MULTIF2019), 2020
13 pages, 2 figures. Talk given at the Frascati Workshop 2019 "Multifrequency Behaviour of High Energy Cosmic Sources - XIII" (Palermo, Italy, 3-8 June 2019)
openaire   +2 more sources

On the Fate of Little Red Dots

The Astrophysical Journal
We study the stability and possible fates of little red dots (LRDs) under the stellar-only interpretation of their observational features. This is performed by a combination of analyzing the relevant timescales in their stellar dynamics and also the ...
Andrés Escala, Lucas Zimmermann, Sebastián Valdebenito, Marcelo C. Vergara, Dominik R. G. Schleicher, Matías Liempi   +5 more
doaj   +1 more source

Mass of a Black Hole Firewall

, 2014
Quantum entanglement of Hawking radiation has been supposed to give rise to a Planck density "firewall" near the event horizon of old black holes.
Abramowicz, M. A., Kluźniak, W., Lasota, J. -P.   +2 more
core   +1 more source

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

Meteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson, S'lindile S. Wela, Leonidas C. Vonopartis, Marco A. G. Andreoli   +3 more
wiley   +1 more source

Astrophysical Black Holes: Overview [PDF]

Progress of Theoretical Physics Supplement, 2004
Recent progress in understanding the nature of astrophysical black holes is briefly reviewed. Special attentions are paid on the comparison of various classes of astrophysical black holes and the non-standard type models of accretion flow onto black holes, including near-critical accretion flow (slim-disk) model and magnetohydrodynamical (MHD) flow ...
openaire   +1 more source

Effects of Dissipation Physics on High-frequency Quasiperiodic Oscillations in Black Hole X-Ray Binaries

The Astrophysical Journal
We numerically investigate the effects of black hole spin and local dissipation profiles on high-frequency quasiperiodic oscillation (HFQPO) observed in black hole X-ray binaries (BHXBs).
Theodore Dezen, Sergio Gomez, Kathryn Anawalt   +2 more
doaj   +1 more source

The United States Magnetotelluric Array and the National Impedance Map

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andrew Frassetto, Benjamin S. Murphy   +7 more
wiley   +1 more source

A study of black holes in F(R)-ModMax gravity: Gravitational lensing and constraints from EHT observations

Physics Letters B
The study of astrophysical phenomena like black hole shadows is an effective approach to properly understand the modified gravity and explore its validity.
Khadije Jafarzade, Zeynab Bazyar, Mubasher Jamil   +2 more
doaj   +1 more source

Image features of spinning regular black holes based on a locality principle

European Physical Journal C: Particles and Fields, 2021
To understand the true nature of black holes, fundamental theoretical developments should be linked all the way to observational features of black holes in their natural astrophysical environments. Here, we take several steps to establish such a link. We
Astrid Eichhorn, Aaron Held
doaj   +1 more source

Autoparallels and the Inverse Problem of the Calculus of Variations

Fortschritte der Physik, Volume 74, Issue 5, May 2026.
ABSTRACT We prove that autoparallel curves associated with a torsion‐free but not necessarily metric‐compatible affine connection can be derived from an action principle. We explicitly construct the action functional and show by standard variational techniques that it produces the desired equations.
Lavinia Heisenberg
wiley   +1 more source