Results 71 to 80 of about 6,949,336 (206)
Material Strategies for Stimulation and Recording in Neural Biocomputing Platforms
Advanced Electronic Materials, EarlyView.Material strategies enabling stimulation and recording are central to neural biocomputing systems. This review examines how electronic materials govern the encoding of inputs and decoding of outputs in living neural networks. Advances in electrical, optical, and multimodal interfaces highlight emerging design principles for biocomputing platforms ...
Sehong Kang +5 more
wiley +1 more source
Spectral Energy Distributions of PG Quasars [PDF]
, 1989 Between 10^(13) - 10^(17) Hz tne continua of all PG quasars can be described in the most general terms by a model consisting of two broad peaks of thermal radiation.
Phinney, S. +4 more
core
Decline of the space density of quasars between z = 2 and z = 4
, 2003 We define a new complete sample of 13 optically luminous radio quasars [MAB(1450 Å) 25.7] with redshift 3.8 < z < 4.5, obtained by cross-correlating the Faint Images of the Radio Sky at Twenty cm (FIRST) radio survey and the Automatic Plate Measuring ...
Mack, K. H. +6 more
core +1 more source
Star formation in luminous LoBAL quasars at 2.0 < z < 2.5 [PDF]
, 2022 Low-ionization broad absorption line quasars (LoBALs) mark an important, yet poorly understood, population of quasars showing direct evidence for energetic mass outflows.
Jari Kotilainen +3 more
core +1 more source
Astronomische Nachrichten, EarlyView.ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar +3 more
wiley +1 more source
Cosmic ray and TeV gamma ray generation by quasar remnants [PDF]
AIP Conference Proceedings, 2001 Results from new broadband (radio to X-ray) high-resolution imaging studies of the dormant quasar remnant cores of nearby giant elliptical galaxies are now shown to permit the harboring of compact dynamos capable of generating the highest energy cosmic ray particles and associated curvature radiation of TeV photons.
openaire +1 more source
Ionized outflows in SDSS type 2 quasars at z ∼ 0.3–0.6 [PDF]
, 2011 We have analysed the spatially integrated kinematic properties of the ionized gas within the inner r ≲ few kpc in 13 optically selected SDSS type 2 quasars at z ∼ 0.3–0.6, using the [O ]λλ4959,5007 lines. The line profiles show a significant asymmetry in
Andrew Humphrey
core
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
Mg ii Line Properties in Lobe-dominated Quasars [PDF]
Astrophysical Journal, 2018 We investigate the relationships between Mg ii λ2798 emission line properties, as well as between these properties and inclination angle and Fe ii strength, in a lobe-dominated quasar sample.
C. Wildy, B. Czerny, A. Ku'zmicz
semanticscholar +1 more source
Weak Hard X-Ray Emission from Broad Absorption Line Quasars: Evidence for Intrinsic X-Ray Weakness [PDF]
, 2014 We report NuSTAR observations of a sample of six X-ray weak broad absorption line (BAL) quasars. These targets, at z = 0.148-1.223, are among the optically brightest and most luminous BAL quasars known at z <1.3.
Comastri, A. +34 more
core +1 more source