Results 21 to 30 of about 4,909 (237)

Extremal bifurcations of rotating AdS4 black holes

open access: yesJournal of High Energy Physics, 2021
The Weak Gravity Conjecture arises from the assertion that all extremal black holes, even those which are “classical” in the sense of being very massive, must decay by quantum-mechanical emission of particles or smaller black holes.
Brett McInnes
doaj   +1 more source

Tidal forces in dirty black hole spacetimes

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
Black holes can be inserted in very rich astrophysical environments, such as accretion disks. Although isolated black holes are simple objects in general relativity, their accretion disks may significantly enrich the field configurations of their ...
Haroldo C. D. Lima Junior   +3 more
doaj   +1 more source

Hair of Astrophysical Black Holes [PDF]

open access: yes, 2014
The "no hair" theorem is not applicable to black holes formed from collapse of a rotating neutron star. Rotating neutron stars can self-produce particles via vacuum breakdown forming a highly conducting plasma magnetosphere such that magnetic field lines are effectively "frozen-in" the star both before and during collapse.
openaire   +2 more sources

Neutrino treatment in multidimensional astrophysical simulations : a new spectral scheme [PDF]

open access: yes, 2014
Neutrinos play a central role in modern physics and astrophysics. Their extremely weak interaction rate with baryons and other leptons makes their detection on the Earth difficult and challenging.
Perego, Albino
core   +1 more source

Black holes in astrophysics

open access: yesNew Journal of Physics, 2005
To appear in a forthcoming Special Focus Issue on "Spacetime 100 Years Later" published by the New Journal of Physics (http://www.iop.org/EJ/njp) The article, finalized in October, 2004, consists of 21 pages of text, 3 figures and 6 movies (found at http://www.cfa.harvard.edu/~narayan/NJP)
openaire   +4 more sources

Quantum black hole seismology. II. Applications to astrophysical black holes [PDF]

open access: yesPhysical Review D, 2020
14 pages, 14 figures. NO and DT equally contributed to this work.
Oshita, Naritaka   +2 more
openaire   +2 more sources

Electric Currents along Astrophysical Jets

open access: yesGalaxies, 2017
Astrophysical black holes and their surrounding accretion disks are believed to be threaded by grand design helical magnetic fields. There is strong theoretical evidence that the main driver of their winds and jets is the Lorentz force generated by these
Ioannis Contopoulos
doaj   +1 more source

Rotating black holes in Horndeski gravity: thermodynamic and gravitational lensing

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
The lack of rotating black holes, typically found in nature, hinders testing modified gravity from astrophysical observations. We present the axially symmetric counterpart of an existing spherical hairy black hole in Horndeski gravity having additional ...
Rahul Kumar Walia   +2 more
doaj   +1 more source

How a Klein–Nishina Modified Eddington-limited Accretion Explains Rapid Black Hole Growth in the Early Universe

open access: yesThe Astrophysical Journal
The discovery of quasars and their supermassive black holes (SMBHs) over 10 ^9 ${M}_{{\rm{\odot }}}$ merely hundreds of millions of years after the Big Bang generates tension with the idea of Eddington-limited accretion and pressures the community into ...
Jackson Frangos   +4 more
doaj   +1 more source

The THESEUS Space Mission and the Infrared Telescope Calibration Unit

open access: yesAstronomische Nachrichten, EarlyView.
ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó   +9 more
wiley   +1 more source

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