Results 51 to 60 of about 4,973 (222)
The Search for Very High Energy γ-rays from Misaligned AGN [PDF]
, 2013 The aim of this work is to study the potential for emission at very high energies (100 GeV) by misaligned active galactic nuclei (AGN) and the future prospects for observations of these objects with the next generation imaging atmospheric Cherenkov ...
CHEESEBROUGH, ALISTAIR
core
The Astrophysical JournalWe present mid-infrared (MIR) observations of the Seyfert 1 galaxy NGC 4151 using the Large Binocular Telescope Interferometer (LBTI). We took open-loop Fizeau images with 66–104 mas (5.8–9.1 pc) resolution in the N -band (at 8.7 and 10.5 μ m), using ...
Jacob W. Isbell +14 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
The bulk kinetic power of radio jets in active galactic nuclei？
, 2009 Based on the Konigl's inhomogeneous jet model, we estimate the jet parameters, such as bulk Lorentz factor Gamma, viewing angle theta and electron number density n(e) from radio very long-baseline interferometry and X-ray data for a sample of active ...
D. R. Jiang +5 more
core +1 more source
Study of the radio and optical properties of Active Galactic Nuclei
Communications of the Byurakan Astrophysical Observatory, 2021 The investigation of the physical properties of active galactic nuclei is one of the most important tasks of astronomy. Until now, the properties of AGN have not been fully studied. Therefore, we have studied a number of important properties of AGN. For example, one of the main properties of AGN is the variability.
openaire +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
Ultrafast Transitions in X‐Ray Irradiated Solids
Contributions to Plasma Physics, EarlyView.ABSTRACT In this review, we present current developments on modeling ultrafast transitions in solids triggered by intense, atto‐ to femtosecond pulses from X‐ray free electron lasers. This specific irradiation regime requires dedicated simulation tools based on theoretical and computational methods, involving the elements of classical and quantum ...
Sebastião Antunes +3 more
wiley +1 more source
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
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