Results 71 to 80 of about 2,322,909 (253)
Geodesic Geometry of Black Holes [PDF]
, 2006 The study of geodesics is of intrinsic significance in the study of the geometry of space-time. In this thesis null, space-like and time-like geodesics are studied in the case of the space-times of Schwarzschild, Reissner-Nordstrouml;m and Kerr black ...
Slezakova, Gabriela
core
The Astrophysical Journal LettersThe little red dots (LRDs) are high-redshift galaxies uncovered by JWST, characterized by small effective radii ( R _eff ∼ 80–300 pc), number densities intermediate between typical galaxies and quasars, and a redshift distribution peaked at z ∼ 5.
Fabio Pacucci, Abraham Loeb
doaj +1 more source
Physics Letters B, 2020 In this paper, a preliminary correspondence between the thermodynamic curvature and the isoperimetric theorem is established from a 4-dimensional ultraspinning black hole.
Zhen-Ming Xu
doaj +1 more source
An Edible Chitosan‐Based Acoustic Sensor for Sound‐Responsive Actuation in Edible Robots
Advanced Functional Materials, EarlyView.This study introduces an edible acoustic sensor for robotic food and edible robotics. Built from a chitosan piezoelectric film between gold electrodes, the sensor enables acoustic communication through ON/OFF keying. Integrated into an edible robot with pneumatically actuated arms and neck, it responds to high‐frequency tones.
Valerio Francesco Annese +8 more
wiley +1 more source
Close-up of star cluster black hole, 2013
, 2013 Close-up image of star cluster black hole. Scientists had believed that supermassive black holes, located at the centres of galaxies, increased their mass in step with the growth of their host galaxy.
Alister W. Graham, Gabriel Perez Diaz
core +1 more source
Atmospheric Limitations for High-frequency Ground-based Very Long Baseline Interferometry
The Astrophysical JournalVery long baseline interferometry (VLBI) provides the highest-resolution images in astronomy. The sharpest resolution is nominally achieved at the highest frequencies, but as the observing frequency increases, so too does the atmospheric contribution to ...
Dominic W. Pesce +12 more
doaj +1 more source
Robustness and the Event Horizon Telescope: the case of the first image of M87*
Philosophy of PhysicsWe examine the justification for taking the Event Horizon Telescope’s famous 2019 image to be a reliable representation of the region surrounding a black hole.
Juliusz Doboszewski, Jamee Elder
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Pressure‐Assisted Dimensional Transformation of 2D Hydrogenated Borophene into 0D Boron Quantum Dots
Advanced Functional Materials, EarlyView.Hydrogenated borophene (HB) is transformed into distinct boron nanostructures through a solvent‐free thermal process. Under flowing nitrogen, hydrogen escape promotes reconstruction into B2O3 nanoplatelets, whereas hydrogen‐induced pressure under sealed conditions facilitates fragmentation into boron quantum dots.
Ozden Gunes Yildiz +11 more
wiley +1 more source
Hierarchical Interferometric Bayesian Imaging
The Astrophysical JournalVery long baseline interferometry (VLBI) achieves the highest angular resolution in astronomy. VLBI measures corrupted Fourier components, known as visibilities.
Paul Tiede +6 more
doaj +1 more source
Advanced Functional Materials, EarlyView.USe3 is introduced as an actinide van der Waals semiconductor that mirrors the quasi‐one‐dimensional physics of transition‐metal trichalcogenides. Polarization‐resolved Raman spectroscopy on exfoliated flakes maps strong in‐plane phonon anisotropy and strain‐tunable mode shifts.
Aljoscha Söll +17 more
wiley +1 more source