Results 61 to 70 of about 40,224 (203)
The origin of radio emission from radio-quiet active galactic nuclei [PDF]
Nature Astronomy, 2019 The central nuclei of galaxies, where supermassive black holes (SMBHs) are thought to reside, can experience phases of activity when they become active galactic nuclei (AGNs). An AGN can eject winds and jets and produce radiation across the entire electromagnetic spectrum.
Francesca Panessa +5 more
openaire +3 more sources
Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei
Astronomische Nachrichten, EarlyView.ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley +1 more source
SDSS J110546.07+145202.4: The First Long-duration Radio Changing-look NLS1 Galaxy
The Astrophysical JournalSDSS J110546.07+145202.4 stands out as a unique radio changing-look narrow-line Seyfert 1 (NLS1) galaxy that has brightened dramatically and shows an exceptionally long duration of its “on” phase.
S. Komossa +14 more
doaj +1 more source
Overview and Status of the International Celestial Reference Frame as Realized by VLBI
Universe, 2022 Accurate measurement of angular positions on the sky requires a well-defined system of reference that is realized with accessible objects. The purpose of this study is to review the international standard realization of such a system, the International ...
Aletha de Witt +3 more
doaj +1 more source
Cosmic Evolution of Nearby Radio Active Galactic Nuclei
Journal of Physics: Conference Series, 2019 Abstract The exact formation mechanism of massive galaxy in the universe still become an open question in modern astrophysics. Radio emission from active galactic nucleus (AGN) is known to be suppressing stellar growth in the most massive galaxies, thus becoming significant ingredient in modeling galaxy formation process.
Taufik Andika, I. +5 more
openaire +2 more sources
On Radio‐bright Active Galactic Nuclei in a Complete Spectroscopic Redshift Survey [PDF]
The Astrophysical Journal, 2006 26 pages with 8 figures.
Reviglio, Pietro, Helfand, David J.
openaire +2 more sources
Roles of 2D halide perovskites in 2D/3D heterojunctions for high‐performance perovskite solar cells
Bulletin of the Korean Chemical Society, EarlyView.This review establishes a design framework for two‐dimensional (2D)/three‐dimensional (3D) perovskite heterojunctions, redefining the 2D perovskite layer as an active semiconductor component. We classify 2D structures by spacer chemistry and analyze their roles within the heterojunction.
Seungmin Lee +4 more
wiley +1 more source
Varstrometry for Dual Active Galactic Nuclei Using Radio Interferometry: VaDAR with the VLBA
The Astrophysical JournalMultiple active galactic nuclei (multi-AGN) are a known result of galaxy mergers. Therefore, they are an important tool for studying the formation and dynamical evolution of galaxies and supermassive black holes. A novel method for the selection of multi-
Emma Schwartzman +8 more
doaj +1 more source
Cytoskeleton, EarlyView.ABSTRACT Cells sense the stiffness of their extracellular matrix (ECM) and adapt their behavior accordingly. We investigated how ECM stiffness affects the spatial organization of talin1, a key mechanosensitive focal adhesion protein. Using polyacrylamide (PA) hydrogels with tunable stiffnesses (0.2–188 kPa), we analyzed cell morphology, migration ...
Joanna Hajduk +5 more
wiley +1 more source
Observational Signatures of Galactic Winds Powered by Active Galactic Nuclei
, 2014 We predict the observational signatures of galaxy scale outflows powered by active galactic nuclei (AGN). Most of the emission is produced by the forward shock driven into the ambient interstellar medium (ISM) rather than by the reverse shock.
Faucher-Giguere, Claude-Andre +2 more
core +1 more source