Results 61 to 70 of about 140,146 (178)
Universe, 2018 Classic black hole mechanics and thermodynamics are formulated for stationary black holes with event horizons. Alternative theories of gravity of interest for cosmology contain a built-in time-dependent cosmological “constant” and black holes
Valerio Faraoni
doaj +1 more source
Testing Ghasemi-Nodehi–Bambi spacetime with continuum-fitting method
European Physical Journal C: Particles and Fields, 2020 The continuum-fitting method is the analysis of the thermal spectrum of the geometrically thin and optically thick accretion disk around stellar-mass black holes.
M. Ghasemi-Nodehi
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European Physical Journal C: Particles and Fields, 2021 We consider the equation of motion of a charged particle or a charged compact object in curved space-time, under the reaction of electromagnetic radiation and also consider a physical situation such that the charged particle or compact object emits ...
Arnab Sarkar, Amna Ali, Salah Nasri
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Fortschritte der Physik, Volume 74, Issue 8, August 2026.ABSTRACT We apply the boundary‐only isothermal formulation of finite‐distance weak gravitational deflection to regular black holes, black‐bounces, traversable wormholes, non‐asymptotically flat backgrounds, and static quadrupolar spacetimes. The methodological advance is not a new value for a known bending angle.
Reggie C. Pantig, Ali Övgün
wiley +1 more source
On the Fate of Little Red Dots
The Astrophysical JournalWe 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 +5 more
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Superradiance of charged black holes embedded in dark matter halos [PDF]
Physical Review DAstrophysical environments are ubiquitous in the Universe; from accretion disks around black holes to galactic dark matter halos, distributions of astrophysical material veil the vast majority of Cosmos.
Alessandro Mollicone, K. Destounis
semanticscholar +1 more source
Vanadium Isotopic Compositions of the High‐3He/4He Baffin Island Lavas
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract The isotopic composition of vanadium (V) in hotspot lavas provides new insight into the source of deep mantle heterogeneities. We measured V isotopic compositions in Paleogene Baffin Island lavas, which erupted above the Iceland plume head, to constrain the mantle plume source. These lavas have V isotopic compositions that are lighter (−0.96 ±
Jonas Kaare‐Rasmussen +4 more
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Simulation-based Prediction of Black Hole Fe Kα Line Profiles
The Astrophysical JournalOne of the most useful spectral diagnostics of accreting black hole systems is the Fe K α fluorescence line. Detected in many systems, it is often used to estimate the black hole spin, as its breadth is attributed to relativistic kinematics near the spin-
Chris Nagele +3 more
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Dynamics Around Supermassive Black Holes: Extreme-mass-ratio Inspirals as Gravitational-wave Sources [PDF]
Astrophysical JournalSupermassive black holes and their surrounding dense stellar environments nourish a variety of astrophysical phenomena. We focus on the distribution of stellar-mass black holes around the supermassive black hole and the consequent formation of extreme ...
Barak Rom +3 more
semanticscholar +1 more source
AGU Advances, Volume 7, Issue 5, August 2026.Abstract The Ross Sea continental shelf plays a key role in the global carbon cycle. However, the sources and cycling of dissolved organic carbon (DOC) in the region are poorly understood. Here, we determined the radiocarbon (14C) and stable carbon isotope (13C) contents of DOC in addition to those of dissolved inorganic carbon (DIC) in the Little ...
Sunmin Oh +8 more
wiley +1 more source