Results 91 to 100 of about 1,259,005 (366)

Jet-Induced Feedback in the [O III] Lines of Early Evolution Stage Active Galactic Nuclei

open access: yesUniverse, 2021
It is well known that active galactic nuclei (AGN) show various forms of interaction with their host galaxy, in a number of phenomena generally called AGN feedback.
Marco Berton, Emilia Järvelä
doaj   +1 more source

VLBA Imaging of NGC 4261: Symmetric Parsec-scale Jets and the Inner Accretion Region [PDF]

open access: yes, 1997
We observed the nuclear region of NGC 4261 (3C270) with the VLBA at two frequencies (1.6 and 8.4 GHz) simultaneously. We find that the position angle of the parsec-scale radio axis agrees, within the errors, with the position angle of the VLA-scale jet ...
Ann E. Wehrle   +4 more
core   +3 more sources

Multimaterial Approach to Improve the Mechanical Properties of a Novel Modified Auxetic Reentrant Honeycomb Structure

open access: yesAdvanced Engineering Materials, EarlyView.
A multimaterial approach is introduced to improve upon auxetic structures by combining two different polymers into the same reentrant honeycomb structure via additive manufacturing. The deformation behavior as well as the resulting Poisson's ratio are thereby improved significantly.
Alexander Engel   +2 more
wiley   +1 more source

The Radio Properties of Radio-Loud Narrow-Line Seyfert 1 Galaxies on Parsec Scales

open access: yes, 2015
We present the detection of compact radio structures of fourteen radio-loud narrow line Seyfert 1 (NLS1) galaxies from Very Long Baseline Array observations at 5 GHz, which were performed in 2013.
Chen, Yongjun   +7 more
core   +1 more source

The bulk kinetic power of radio jets in active galactic nuclei [PDF]

open access: yes, 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 ...
M. Gu, Xinwu Cao, D. Jiang
semanticscholar   +1 more source

Performance Comparison of Surface Sensitizers for Diode Laser Powder Bed Fusion of Polyamide 12

open access: yesAdvanced Engineering Materials, EarlyView.
Laser‐generated nanoparticles transform standard PA12 powders into high‐performance, dye‐free feedstocks for diode laser 3D printing. Despite identical absorbance at 808 nm, CuS, LaB6, and CB coatings reveal striking differences in fusion and strength—unlocking new design space for recyclable, industrial‐grade polymers.
Michael Willeke   +9 more
wiley   +1 more source

HST Observations of the Optical Jets of PKS 0521-365, 3C371, and PKS 2201+044 [PDF]

open access: yes, 1999
HST observations have led to the discovery of the optical counterpart of the radio jet of PKS 2201+044, and to a detailed analysis of the optical jets of PKS 0521-365 and 3C371.
Akujor C. E.   +12 more
core   +2 more sources

DIRECT EVIDENCE FOR OUTFLOW OF METAL-ENRICHED GAS ALONG THE RADIO JETS OF HYDRA A [PDF]

open access: yes, 2009
Using deep Chandra observations of the Hydra A galaxy cluster, we examine the metallicity structure near the central galaxy and along its powerful radio source.
C. Kirkpatrick   +11 more
semanticscholar   +1 more source

Mitigation of Cracks in High‐Performance Nickel‐Based Superalloys in Powder Bed Fusion Laser Beam of Metals Using a Metal Matrix Composite Approach

open access: yesAdvanced Engineering Materials, EarlyView.
High‐performance nickel‐based superalloys are often not processible in additive manufacturing (AM) due to hot cracking. The findings in this manuscript propose an efficient method to mitigate cracking and enhance mechanical properties of these alloys by producing a metal matrix composite, contributing to the material and process perspective of the AM ...
Klaus Büßenschütt   +3 more
wiley   +1 more source

Helical Magnetic Field in a Massive Protostellar Jet

open access: yesThe Astrophysical Journal Letters
Highly collimated outflows (jets) are observed across a wide range of astrophysical systems involving the accretion of material onto central objects, from supermassive black holes in active galaxies to proto-brown dwarfs and stellar-mass black holes ...
A. Rodríguez-Kamenetzky   +9 more
doaj   +1 more source

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