Results 41 to 50 of about 4,909 (237)

Nonthermal Synchrotron Emission and Polarization Signatures during Black Hole Flux Eruptions

The Astrophysical Journal
In this work, we investigate synchrotron emission and the observational signatures of anisotropic nonthermal electrons during magnetic flux eruptions in a magnetically arrested disk, using 3D GRMHD simulations.
Fan Zhou, Jiewei Huang, Yuehang Li, Zhenyu Zhang, Yehui Hou, Minyong Guo, Bin Chen   +6 more
doaj   +1 more source

The High Energy X-ray Probe (HEX-P): probing accretion onto stellar mass black holes

Frontiers in Astronomy and Space Sciences
Accretion is a universal astrophysical process that plays a key role in cosmic history, from the epoch of reionization to galaxy and stellar formation and evolution. Accreting stellar-mass black holes in X-ray binaries are one of the best laboratories to
Riley M. T. Connors, John A. Tomsick, Paul Draghis, Benjamin Coughenour, Aarran W. Shaw, Javier A. García, Javier A. García, Dominic Walton, Kristin Madsen, Daniel Stern, Nicole Cavero Rodriguez, Thomas Dauser, Melania Del Santo, Jiachen Jiang, Henric Krawczynski, Honghui Liu, Joseph Neilsen, Michael Nowak, Sean Pike, Andrea Santangelo, Navin Sridhar, Navin Sridhar, Navin Sridhar, Andrew West, Jörn Wilms   +24 more
doaj   +1 more source

Embedding Black Holes and Other Inhomogeneities in the Universe in Various Theories of Gravity: A Short Review

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
doaj   +1 more source

Perturbative correction terms to electromagnetic self-force due to metric perturbation: astrophysical and cosmological implications

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
doaj   +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

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

Introduction to Black Hole Astrophysics [PDF]

, 2014
This book is based on the lecture notes of the course on black hole astrophysicsgiven at the University of La Plata, Argentina, by one of us (GER). The materialaims at advanced undergraduate and graduate students with interest in astrophysics.The course takes one semester and is usually complemented by a course on high-energyastrophysics.
Romero, Gustavo Esteban, Vila, Gabriela Soledad   +1 more
openaire   +2 more sources

Stochastic Gravitational Wave Background from Primordial Black Holes

, 2022
reservedOne of the biggest problems in modern cosmology is to assess the nature of dark matter. We propose Primordial Black Holes (PBHs) as a possible candidate and we investigate how this scenario can be probed with the Stochastic Gravitational Wave ...
MAGARAGGIA, ALBERTO
core  

LifeMet: Report on the 2024–2025 meteorite recovery expedition in Dronning Maud Land, Antarctica for the study of microbe–meteorite interactions

Meteoritics &Planetary Science, EarlyView.
Abstract Since the discovery of nine meteorites near the Yamato mountains in 1969, Antarctica has been recognized as a superb location for meteorite recovery. While Antarctic recovery expeditions prioritize meteorite preservation for mineralogical and planetary studies, meteorites are not typically collected for biological applications.
Rachael Lappan, Rachel S. Kirby, Andrew G. Tomkins   +2 more
wiley   +1 more source